Having problems with message search?
Agnet April 12/04
Alberta's canola industry averts disruption of product to China
Greenpeace shifts focus
Pakistan facing multi-million dollar law suit for rejecting Australian wheat
U.S. EPA fines Arcadia Company for selling mislabeled disinfectants
Fruit farmers say cutbacks hurt
Toward a better sugar beet
Soybean aphid, Part 1: Overwintering, egg hatch, and colonization
Grub damage apparent in wheat
Dual Magnum special local needs 24(c) registration granted in sugar beets
Wheat in condition good; normal development
Getting your corn crop off to a good start
Calculating seeding rates for corn
Current weed control reminders
Black cutworm moths flying in Ohio
how to subscribe
Alberta's canola industry averts disruption of product to China
April 11, 2004
CP Wire
EDMONTON - According to this story, China set an April 20 deadline for makers of genetically modified crops to submit safety certificates required under new regulations, and as of last week, it looked like Canadian canola producers would be locked out of China since developers of genetically modified canola, Bayer and Monsanto, had not yet received approvals from China.
But Barbara Isman, president of the Canola Council of Canada, was cited as saying the organization has learned that the Chinese vice-minister of agriculture has signed off on the safety certificates for those companies, adding, "Although there's nothing on paper received by the developers yet, they are expecting to receive those (soon). I would describe it as cautious optimism. I can't say that we expect anything to go wrong but you just don't know."
Greenpeace shifts focus
April 12, 2004
The Record (Kitchener, Cambridge and Waterloo)
A4
Canadian Press
Steven Guilbault, Greenpeace's Quebec spokesman, was cited as saying that the group won't participate in the latest campaign against the Canadian seal hunt because it's focusing on more pressing concerns such as genetically modified foods and climate change, adding, "People aren't talking about climate change, the ozone layer or GMOs. Our role is to work on issues that are particularly urgent."
A renewed international protest initiative began after Canada's announcement last year of a quota of 975,000 seals that could be killed off Newfoundland and Labrador through 2005. The latest paid advertisements coincided with the start of the peak killing period this month.
Pakistan facing multi-million dollar law suit for rejecting Australian wheat
April 12, 2004
Agence France Presse
SYDNEY - A Pakistani trading company whose shipments of Australian wheat were rejected because of alleged contamination by a fungus not found in Australia is, according to this story, threatening a 30-million US dollar law suit against Pakistan, it was reported Monday.
The Australian newspaper said Karachi-based importer Tradesman International alleges the real reason for the rejection of the shipments was profiteering by corrupt Pakistani government officials.
Pakistani authorities refused to allow the four shipments to be unloaded two months ago after locally administered tests allegedly detected the fungal disease, Karnal bunt, which imparts a fishy smell that makes the grain unfit for human consumption.
Karnal bunt has never been detected in Australia and Australian experts who tested the grain said they found none in the shipment.
U.S. EPA fines Arcadia Company for selling mislabeled disinfectants
April 8, 2004
U.S. Environmental Protection Agency
http://yosemite.epa.gov/r9/r9press.nsf/7f3f954af9cce39b882563fd0063a09c/546a67ecd3e2393d88256e70007416c5?OpenDocument
SAN FRANCISCO The U.S. Environmental Protection Agency recently fined Elio E. Salvo Inc., doing business as Miracle Sealants Company of Arcadia Calif., $13,200 for allegedly selling a mislabeled pesticide product named "Miracle Disinfectant, a violation of EPA's pesticide regulations.
A review of the label showed that it did not adequately warn consumers of the potential risks involved with use of this product. The label was lacking information consistent with the EPA approved labeling requirements for ingredients, precautionary statements and application methods. This information is necessary to communicate effective use of the product.
"Pesticide registrants are responsible for ensuring that the labels on their product contain the necessary instructions," said Enrique Manzanilla, EPA's director of the pesticide division for the Pacific Southwest region. "Precautionary information is necessary to ensure consumers use the product safely."
The EPA registers pesticides under the Federal Insecticide, Fungicide and Rodenticide Act. Properly registered products have labels that list their ingredients, their human, environmental, physical and chemical hazards, and information on their use, storage and disposal.
The alleged violation was noted after an inspection by the California Department of Pesticide Regulation.
Fruit farmers say cutbacks hurt
April 11, 2004
CP Wire
HAMILTON - Niagara, Ontario's fruit farmers, grape growers and greenhouse operators are, according to this story, lamenting cutbacks to the programs at the historic Vineland Agricultural Station, which dates back to 1906.
Once a thriving centre of information and education for local farmers, the station has fallen victim to a modern ailment -- downsizing.
Irwin Smith, president of Flowers Canada, was quoted as saying, "Growers could pop in to talk to researchers and specialists or just to look at all the latest varieties of flowers. It was a focal point for the entire agriculture industry in Niagara."
In 1997, the province rolled the station -- known as the Horticultural Research Institute of Ontario -- into the research contract of the University of Guelph.
Smith says the Ministry of Agriculture gave the university an annual grant of about $50 million to run all the agricultural stations in the province and to update and modernize agricultural programs.
Since then, the consolidation process has seen entire programs and research personnel transferred from Vineland to the university.
Jerry Walker, a special projects co-ordinator for the Grape Growers of Ontario and the Tender Fruit Producers of Ontario, was cited as saying the gradual whittling away of services and staff at Vineland has resulted in the loss of valuable programs.
Four scientists involved in assessing the quality and suitability of new varieties of fruit have been transferred to the university, as well as the only oneologist.
"There's been a slow bleed on the system ... and you don't realize what we've lost until it's gone," Walker said.
While the resources at the Vineland continue to shrink, the university said there are no plans to shut it down altogether.
Clarence Swanton, chair of the university's Plant Agriculture Department, was quoted as saying, "Yes, we had to consolidate because of budget constraints, but those programs and scientists that have moved here will be in a much better position because of our teamwork approach that will improve the quality of research. We see a bright future for Vineland and are looking forward to celebrating its centennial in 2006."
Toward a better sugar beet
April 12, 2004
ARS News Service
Agricultural Research Service, USDA
A team of Agricultural Research Service scientists in East Lansing, Mich., is well on its way toward developing sugar beets with improved seedling vigor, higher sugar content, enhanced disease resistance and other valuable traits.
J. Mitchell McGrath, a geneticist at the ARS Sugar Beet and Bean Research Unit in East Lansing, leads the team, which has given the Beet Sugar Development Foundation of Denver, Colo., a simple test for seedling emergence. The emergence test has already led to commercial varieties with higher germination rates.
The team also discovered two possible genetic markers for seedling vigor, which is the ability of a seed to sprout and of the seedling to survive in adverse environments.
Regarding high sugar content, the researchers found a possible marker to predict beets with this trait when they're about seven weeks old, instead of waiting for full growth in about 25 weeks. McGrath and colleagues theorize that beets with the highest sugar content aren't better at storing sugar, just better at keeping the concentration high by letting less water in.
The scientists are also on the trail of the genes for resistance to two major seedling disease agents: Aphanomyces and Rhizoctonia. Disease is the main threat to a seedling's survival in its first month. The researchers have developed a test for Aphanomyces seedling disease and used it to show there are two genes for resistance. They're also examining sugar beet germplasm to develop ideas that could help in breeding for resistance to Rhizoctonia seedling disease.
Read more about the research in the April issue of Agricultural Research magazine, available online at:
http://www.ars.usda.gov/is/AR/archive/apr04/beet0404.htm
ARS is the U.S. Department of Agriculture's chief scientific research agency.
Soybean aphid, Part 1: Overwintering, egg hatch, and colonization
April 8, 2004
Field Crop Advisory, Vol. 19, No. 2
Michigan State University
Christina DiFonzo, Entomology
http://www.ipm.msu.edu/CAT04_fld/FC04-08-04.htm#1
This is the first in a series of articles on soybean aphid. Upcoming editions of the CAT Alert will feature articles on scouting, thresholds, and management recommendations for 2004.
Soybean aphid has been overwintering as eggs throughout the winter, and is set to hatch in southern Michigan. Egg hatch was already recorded in Indiana at the end of March. My lab keeps potted buckthorn shrubs infested with eggs, and we will be examining the specimens each day to determine the timing of hatch this spring.
Once the eggs hatch, the aphids (all female) feed for three generations on buckthorn in April and May. Observations over the last few springs show that aphid colonies are usually found closer to the ground rather than up in the buckthorn canopy. For example, at the MSU Crop and Soil Sciences farm last spring, we found the most aphids on the branch tips of scrubby low-growing shrubs regrowing from cut buckthorn stumps. Low growth may be more attractive for egg laying in the fall, or egg survival may be greater under the snow pack closer to the ground.
In each generation on buckthorn, a portion of the aphid population is winged as adults. The winged adults leave buckthorn to find their summer host, soybean. With each generation, the proportion of winged migrants is larger so that by the third generation, most or all of the aphids have wings and leave buckthorn.
The first aphids that leave buckthorn do so before soybean is planted or emerges; many of these first migrants may die. But as the season progresses, the aphids find fields to colonize. In parts of Michigan where we know buckthorn is common, my students find soybean aphid on plants at the V1 stage – small plants with a single leaflet.
In areas lacking buckthorn (for example, the counties in southwest Michigan), colonization is later. The winged aphids colonizing these fields are actually produced in soybean fields colonized early in the spring, perhaps many miles away. In 2003, my lab worked in a field in Van Buren County that was not colonized by aphids until early July. Interestingly, we first found aphids several days after a storm front moved across the region from west to east. I suspect that winged aphids from Minnesota, Iowa and Wisconsin (states with large areas of buckthorn) were carried by the weather front and deposited across southern Michigan and northern Indiana. Another area lacking buckthorn is the eastern edge of the Thumb. Extension agents in that part of the state report that aphids seem to infest fields from west (Saginaw County with large areas of buckthorn) to east (Sanilac and Huron Counties with no or little buckthorn).
A prediction for 2004? No way! Michigan had damaging populations of SBA in 2000, 2001, and 2003. But in 2002, aphid numbers were low. We still do not fully understand why some years are good or bad for aphids. Overwintering egg survival, early season predation, timing of soybean emergence and weather conditions all may play a role in producing a “bad” aphid year.
Grub damage apparent in wheat
April 8, 2004
Field Crop Advisory Team Vol. 19, No. 2
Michigan State university
Christina DiFonzo, Entomology
http://www.ipm.msu.edu/CAT04_fld/FC04-08-04.htm#2
As grass greens up, areas with grub damage are becoming more apparent not only in lawns, but also in wheat fields and pasture. Over the last several years, the amount of grub-damaged wheat has increased dramatically, thanks to the European chafer. This insect is relatively new to Michigan. It was introduced a number of years ago in the eastern U.S., then it moved across Ontario into Michigan in the 1990s. It is now one of the most important grubs in home turf (along with Japanese beetles and true white grubs), and it is the most common grub found in winter wheat.
Adult European chafer beetles are particularly fond of laying eggs in soybean fields. The small grubs feed on the roots of soybean in August. If the field is rotated to winter wheat in the fall, the grubs are provided food in the fall and the following spring. In essence, the wheat field becomes the grub version of Old Country Buffet.
European chafer grubs are more cold tolerant than other grub species. Thus they feed late into the fall (perhaps even under snow cover), and then early in the spring. This extended damage window means that wheat fields are exposed to feeding for many months. In some cases, damage in the fall is so severe that fields are a total loss even before the snow falls. This makes it easier to decide to work the field up in the spring. In other fields, the damage takes place under the snow, and isn’t apparent until spring as thinning patches in the field. Then it is more difficult to judge overall yield loss and make a decision to rotate the field to corn or soybeans.
It is unusual for an entire field to be affected by chafers. Cooperative work between the University of Guelph and MSU shows that chafer number is greater in sandier soils. Thus if you know the soil types across your field, you can often predict where chafer damage will occur – tops of hills and other areas with light soil. To confirm that thinning areas are caused by chafer feeding, simply pull or dig plants up at the edge of the thinning patch and look for grubs. Unfortunately, there is nothing you can do to rescue an infested wheat field. However, for future reference, tillage before planting helps to reduce grub populations. If rotating out of wheat into corn, most soil insecticides also control grubs.
Dual Magnum special local needs 24(c) registration granted in sugar beets
April 8, 2004
Field Crop Advisory Team Alert Vol. 19, No. 2
Michigan State University
Christy Sprague, Crop Soil Sciences
http://www.ipm.msu.edu/CAT04_fld/FC04-08-04.htm#4
Last year Syngenta was granted a Section 3 registration for Dual Magnum for weed control in sugar beets. This registration allowed for the use of Dual Magnum preplant incorporated (PPI), preemergence (PRE), and postemergence (POST) after sugar beets had one true leaf. Due to injury and stand loss that occurred from PPI and PRE Dual Magnum applications during the 2003 season, these applications were removed from the Section 3 registration for the 2004 growing season. The label for POST applications of Dual Magnum in sugar beets remained intact. However, there has been interest by some growers for continued use of PPI and PRE applications of Dual Magnum for weed control in sugar beets under certain conditions. To accommodate these requests the Beet Sugar Development Foundation worked with Syngenta and the Michigan Department of Agriculture for a Section 24(c) registration for PRE and PPI applications of Dual Magnum.
What exactly is the Dual Magnum Section 24(c) registration?
This registration allows for the use of PPI and PRE applications of Dual Magnum. In order for a grower to be able to utilize Dual Magnum at these application timings the grower needs to obtain the 24(c) label. To receive this label the grower must sign an indemnification agreement that releases Syngenta and the Beet Sugar Development Foundation of all liability of injury or crop loss from PPI or PRE applications of Dual Magnum. What this really means that if a grower wants to use this product PPI or PRE in sugar beets he or she will be using this product at their own risk and any crop injury or stand loss resulting from PPI and PRE applications of Dual Magnum stop at the grower.
How does a grower get a Dual Magnum 24(c) label?
The agriculturalists from both Monitor and Michigan Sugar Companies have copies of the indemnification agreements for growers to sign if they are planning to use Dual Magnum PPI or PRE for weed control. The indemnification agreement needs to be signed and notarized prior to receiving the 24(c) label from the agriculturalists. It is important to note that in order to legally apply Dual Magnum PPI or PRE this year the grower must have a copy of the 24(c) label.
How should Dual Magnum be applied in sugar beets?
Even with the 24(c) registration, Michigan State University does not recommend the use of Dual Magnum PPI or PRE in sugar beets. MSU research over the last seven years and grower experiences from last year have shown that substantial stand loss can occur from PPI and PRE applications of Dual Magnum particularly if there is a rainy period when sugar beets are emerging. Last year in MSU research trials there was between 21 and 45 percent stand loss from PRE applications of Dual Magnum at three different sites. Also remember that with PPI and PRE applications of Dual Magnum you are at your own risk, and if injury or stand loss occurs, it is your responsibility and there is no recourse. MSU recommends the best way to use Dual Magnum for weed control in sugar beets is to apply it after sugar beet emergence, particularly after sugar beets have two true leaves. After this stage sugar beets are very tolerant to Dual Magnum and these applications can provide residual grass and pigweed control. Remember that Dual Magnum does not control emerged weeds. So other herbicides will need to be used to control already emerged weeds.
Results of herbicide-resistant marestail in Michigan
Steve Gower
Diagnostic Services
Marestail (Conyza canadensis), also known as horseweed, is a weed that has developed resistance to glyphosate and ALS-inhibiting herbicides used extensively for weed control in many crops. Being an annual member of the aster family, a mature marestail plant is capable of producing thousands of wind-disseminated seed. This seed, much smaller and lighter than dandelion seed, is able to blow considerable distances by wind. A resistant marestail population will likely have the ability to infect fields miles away. Currently, glyphosate-resistant marestail has been confirmed in at least ten states in the Eastern U.S. with ALS resistance reported in Ohio, Indiana, and Michigan.
Glyphosate and ALS inhibitors are very important to Michigan soybean producers. Identifying herbicide resistant marestail populations in Michigan will allow growers and ag professionals to recognize the problem and initiate appropriate management strategies with the goal of preventing or limiting its spread. To address this problem, marestail has been screened for glyphosate, ALS and triazine resistance in MSU Diagnostic Services since 2001. This service is FREE to Michigan soybean producers. All sample costs are covered by checkoff dollars through the Michigan Soybean Promotion Committee.
To date, no glyphosate-resistant marestail has been found in Michigan. However, ALS-resistant marestail has been confirmed in at least 11 locations in Branch, Clinton, Eaton, Hillsdale, Ionia, Montcalm and Sanilac Counties. Surprisingly, triazine-resistant marestail has been confirmed in two locations in Gratiot County. To our knowledge, this is the first report of triazine-resistant marestail in a corn-soybean rotation in the U.S.
This resistance-screening program will be offered for the 2004 growing season. If you have fields where marestail is a problem and resistance is suspected, collect seedheads from mature plants in late summer to early fall. Consult the marestail submittal form for detailed sampling instructions on field criteria and seedhead collection. Marestail submittal forms will be available at various locations, including county MSU Extension offices, grain elevators and chemical retail businesses.
Marestail seedheads and the submittal form should be dropped off at your local county MSU Extension Office or sent directly to: MSU Diagnostic Services, 101 Center for Integrated Plant Systems, East Lansing, MI 48824, Attn: Steven Gower.
If you have any questions, please call Steven Gower at 517-432-9693 or send an email to: sgower@...
Wheat in condition good; normal development
April 6-13, 2004
C.O.R.N. Newsletter 2004-08
Ohio State University
Patrick Lipps
http://corn.osu.edu/index.php?setissueID=31
After the colder weather in late March and the first week of April, the wheat crop appears to still be in fairly good condition. It is likely that the worst conditions are now past and we can expect rapid growth of the crop over the next couple of weeks. The recent colder weather has held the crop back somewhat, but there is no need to be concerned at this time. This will give growers a few more days to make the needed nitrogen applications and apply herbicides before Growth Stage 6 when the first node can be detected at the base of the stems. Crop development is on schedule with some early planted fields in extreme southern Ohio approaching this critical growth stage. In northern Ohio little growth has occurred to date. If weather conditions remain normal we can likely expect stem elongation to occur in two to three weeks in northern Ohio.
Winter damage to the wheat crop appears to be confined to sections in fields where water accumulated and froze into ice sheets in January. Therefore, expect few plants to recover or survive in these areas. Few diseases are usually detected in wheat before the flag leaf emergence stage, but in some areas we may see evidence of one or more virus diseases.
Wheat spindle streak mosaic and soilborne wheat mosaic virus can be detected during early phases of wheat growth in the spring. Symptoms of these two wheat virus diseases are sometimes very similar, except that wheat spindle streak is more uniform throughout a field and soilborne wheat mosaic affects plants in low areas or in pockets. Most modern wheat varieties have resistance to these two viruses, but there are still some out there that are susceptible to one, or less frequently, both diseases. Some varieties highly susceptible to soilborne wheat mosaic virus remain stunted in the spring and produce only a few tillers.
As temperatures warm in May plants generally recover and the yellowing symptoms tend to disappear. If plants recover soon enough there is little yield loss. If either of these virus diseases appear in your fields, do not plant that variety again in that field, but choose a variety resistant to soil-borne virus diseases in the future.
Getting your corn crop off to a good start
April 6-13, 2004
C.O.R.N. Newsletter 2004-08
Ohio State University
Peter Thomison
http://corn.osu.edu/index.php?setissueID=31#B
The record corn yields of 2003 owed much to timely planting and good seedbed conditions. Last year, 83 percent of the corn crop was planted by May 4 – nearly three weeks ahead of the five-year average. However, keep in mind that 2003 rainfall was near normal to below average with temperatures generally warmer than normal in the 2 to 3 weeks preceding planting. Dry soil conditions allowed timely field operations and minimized soil compaction.
Mistakes made during the planting operation are usually irreversible, and can put a "ceiling" on the crop's yield potential before the plants have even emerged. The following are some proven practices that will help get a crop off to a good start.
Perform tillage operations only when necessary and under the proper soil conditions.
Avoid working wet soil and reduce secondary tillage passes. Perform secondary tillage operations only when necessary to prepare an adequate seedbed. Shallow compaction created by excessive secondary tillage can reduce crop yields (remember 2002 when we were hit with drought stress after the cold wet spring). Deep tillage should only be used when a compacted zone has been identified and soil is relatively dry. Late summer and fall are the best times of year for deep tillage.
Complete planting by mid-May
If soil conditions are dry, begin planting before the optimum date. (The recommended time for planting corn in northern Ohio is April 15 to May 10 and in southern Ohio, April 10 to May 10). Avoid early planting on poorly drained soils or those prone to ponding. Yield reductions resulting from "mudding the seed in" may be much greater than those resulting from a slight planting delay. In 2003 many growers who prudently delayed planting wet fields until late May still ended up with some very decent yields.
If growers have the equipment capability to plant more than half of their corn acres prior to the optimum planting date, then this should allow planting all the corn acres prior to the calendar date when corn yields begin to decline quickly. During the two to three weeks of optimal corn planting time, there is, on average, about one out of three days when field work can occur. This narrow window of opportunity further emphasizes the need to begin planting as soon as field conditions will allow, even though the calendar date may be before the optimal date. As a guide, calendar date is more reliable than soil temperature for making the decision on when to begin to plant corn.
Adjust Seeding Depth According to Soil Conditions.
Plant between 1-1/2 to 2 inches deep to provide for frost protection and adequate root development. In April, when the soil is usually moist and evaporation rate is low, seed should be planted no deeper than 1-1/2 inches. As the season progresses and evaporation rates increase, deeper planting may be advisable. When soils are warm and dry, corn may be seeded more deeply up to 2 inches on non-crusting soils. Consider seed-press wheels or seed firmers to ensure good seed-soil contact.
One risk associated with shallower planting depths is the possibility of poor development of the permanent (or secondary) root system if the crown is at or near the soil surface, some of the permanent roots may not grow under hot, dry conditions (resulting in the "rootless" and "floppy" corn syndromes). Another potential risk from planting less than 1-1/2 inches is shoot uptake of soil-applied herbicides. Seeding depth should be monitored periodically during the planting operation and adjusted for varying soil conditions. Irregular planting depths contribute to uneven plant emergence, which can reduce yields.
Adjust Seeding Rates on a Field-by-Field Basis.
Adjust planting rates by using the yield potential of a site as a major criterion for determining the appropriate plant population. Higher seeding rates are recommended for sites with high-yield potential with high soil-fertility levels and water-holding capacity. On productive soils, with long term average yields of 160 bu/acre or more, final stands of 30,000 plants/acre or more may be required to maximize yields.
Lower seeding rates are preferable when droughty soils or late planting (after June 1) limit yield potential. On soils that average 120 bu/acre or less, final stands of 20,000 to 22,000 plants/acre are adequate for optimal yields. Seeding rate can be cut to lower seed costs but this approach typically costs more than it saves. Most research suggests that planting a hybrid at suboptimal seeding rates is usually more likely to cause yield loss than planting above recommended rates (unless lodging becomes more severe at higher population levels). Under drought stress conditions, high plant populations usually do not cause significant yield reduction on most Ohio soils. When planting occurs in cold soils, usually early planting dates, the seeding rate should be 10-15% higher than the desired harvest population. Follow seed company recommendations to adjust plant population for specific hybrids.
Calculating seeding rates for corn
April 6-13, 2004
C.O.R.N. Newsletter 2004-08
Ohio State University
Peter Thomison
http://corn.osu.edu/index.php?setissueID=31#C
If the recommended plant population for a corn hybrid is 28,000 plants/acre based on various factors including site yield and potential hybrid characteristics, what should the seeding rate be? Remember a recommended plant population refers to final plant stand or the number of plants/A at harvest not seeding rate.
The number of plants/acre at harvest is always less than the number of seeds planted (unless you have a lot of volunteer corn!) Planting date, tillage practices, pest problems, chemical injury, planter performance, and seed quality can affect final corn populations obtained in the field. To compensate for these losses, a corn grower needs to plant more seed than the desired population at harvest.
To determine an appropriate seeding rate, use the following formula:
Seeding rate = Plant population per acre at harvest/(Seed germination x Expected survival)
Seed germination is the percent germination shown on the seed tag. Most seed corn has a germination rate of 95% or higher. Expected survival is the percentage of plants that you expect to survive to become harvestable plants in the fall. Keep in mind that survival rates for corn are often in the range of 85 to 95% but can vary considerably depending on planting conditions and other environmental factors. When early planting is likely to create stressful conditions for corn during emergence (e.g. no-till in early to mid April), consider seeding rates 10 to15% higher than the desired harvest population.
EXAMPLE: A grower wants to achieve a final stand of 28,000 plants/acre. The seed tag indicates a germination rate of 95% and the grower expects that 90% of the germinable seed will survive until harvest. Based on the formula above, divide the desired plant population at harvest, 28,000 plants/acre, by 0.95 x 0.90 (0.855) to obtain a seeding rate of 32,749 seeds/A. (Note that % germination and % survival are converted to decimal form for use in the formula.) If only 85% of the germinable seed were expected to survive (due to stressful environmental conditions during emergence), then dividing 28,000 by 0.95 x 0.85 (.8075) would give a higher seeding rate of 34,675 seeds/A.
Current weed control reminders
January 6-13, 2004
C.O.R.N. Newsletter 2004-08
Ohio State University
Jeff Stachler
http://corn.osu.edu/index.php?setissueID=31#C
Alfalfa in most of the state is beyond 2 inches, therefore Velpar can no longer be used in alfalfa. The only options at this time are Pursuit and Raptor.
If you are targeting winter annual weeds in wheat, those applications need to be going on now. If targeting Canada thistle or summer annual weeds, then wait a little longer. Watch wheat development stages and herbicide labels to prevent injury.
Now is the time to begin early preplant burndown applications, especially in no-tillage soybeans. For excellent control of dandelion, marestail/horseweed, and lambsquarters that may be emerged be sure to include 2,4-D in the burndown mixture. Weedone 650 and E-99 can be applied at 1.3 pt/A (1.0 lb ai/A) 15 days before planting of soybeans.
Do not apply herbicides when the morning lows are below 35 degrees.
Black cutworm moths flying in Ohio
April 6-13, 2004
C.O.R.N. Newsletter 2004-08
Ohio State University
Bruce Eisley, Ron Hammond
http://corn.osu.edu/index.php?setissueID=31#C
We have begun trapping for some of the agronomic insects that can cause problems in Ohio. At the present time we will have pheromone traps in the field at three sites for black cutworm and common armyworm. Other traps will be added later in the season for European corn borer and southwestern corn borer. Pheromone traps will not tell us if a particular insect is going to be a problem or in which field(s) the problem is going to occur but the traps can be used to track insect emergence, movements and when peak populations occur. Information from the traps will be reported in future newsletters and on the web at: http://entomology.osu.edu/ag/04traps.htm
Agnet is produced by the Food Safety Network at the University of Guelph and is sponsored by the Ontario Ministry of Agriculture and Food, Plants Program at the University of Guelph, Agricultural Adaptation Council (CanAdapt Program), AGCare, Canadian Council of Grocery Distributors, ConAgra Foods Inc., Meat Livestock Australia, Pioneer Hi-Bred Limited (Canada), Monsanto Canada, National Pork Board, Syngenta Seeds, Inc. USA, JIFSAN, CropLife Canada, Canadian Animal Health Institute, Burger King Corporation, Southern Crop Protection Association, Ag-West Biotech Inc., Ontario Agri-Food Technologies, Syngenta Crop Protection, Feedlot Health Management Services, Institute of Environmental Science Research Limited , National Food Processors Association, Tactix Government Consulting, Inc., CanAmera Foods, Global Public Affairs, and Agri Business Group, Inc.
To subscribe to the html version of Agnet (subscription is free), send mail to:
listserv@...
leave subject line blank
in the body of the message type:
subscribe agnet-L firstname lastname
i.e. subscribe agnet-L Doug Powell
(replace agnet-L with agnettext to subscribe to the text version of agnet)
To unsubscribe to the html version of Agnet, send mail to:
listserv@...
leave subject line blank
in the body of the message type:
signoff agnet-L
(replace agnet-L with agnettext to unsubscribe to the text version of agnet)
For more information about the Agnet research program, please contact:
Dr. Douglas Powell
Associate Professor
dept. of plant agriculture
University of Guelph
Guelph, Ont.
N1G 2W1
tel: 519-824-4120 x54280
cell: 519-835-3015
fax: 519-763-8933
dpowell@...
http://www.foodsafetynetwork.ca
The Food Safety Network's bilingual toll-free line for obtaining food safety
information: 1-866-50-FSNET (1-866-503-7638)
archived at "http://131.104.232.9/agnet-archives.htm
Send Email