Soybeans on the average are at growth stage V5. Some soybeans are approaching the R1 stage which is the beginning of flowering. It is important to understand the growth stages especially when considering the application of a fungicide for disease control. Be sure to read the label of the specific fungicide that you may use and apply at the appropriate growth stage of soybeans. Consider the following when determining the economics of fungicide applications:
1. Disease pressure and/or forcast
2. Varietal suseptibility
3. Crop rotation
4. Crop Growth Stage/Maturity
5. Field Environment (River bottoms vs. upland)
6. Grain Prices
7. Cost of fungicide and application
Thursday, June 26, 2008
Wednesday, June 18, 2008
Hail Damage Assessment Time
Two hail adjustor's have been in my office today and I thought it would be time to give you some idea to the damage inflicted on crops this past Monday. The following link is an excellent place to visit. Bob Neilsen, Purdue Corn specialist has a gallery of pictures of hail damage to young corn at different growth stages. http://www.agry.purdue.edu/ext/corn/news/timeless/HailDamageYoungCornGallery.html Another excellent link is: Recovery From Hail Damage to Young Corn This site will give more detailed information regarding yield potential of the crop according to growth stage and severity of the damage. You might want to review this before the hail adjusters visit.
Timely Weed Control
Timely applications of herbicides will enhance the effectiveness of the specific chemistry of the product as well as the successful eradication of problem weeds. Soybean development is at or approaching the ideal time to control weeds. Most herbicides work best when applied to small actively growing weeds. So scout those crop fields now and determine is the time is right for your post emergent weed control strategy.
This link will give you great weed control information. http://agcrops.osu.edu/weeds/
Determining Corn Leaf Stages
Most university agronomists prefer the leaf collar method in determining the stage of development of a corn plant. It is important that growers understand how to identify the various corn growth stages as many products applied to corn especially fungicides have a direct relationship between timing of application of a fungicide and the stage of crop development. When determining the growth stage of corn using the leaf collar method, count only leaves with visible leaf collars (see photo). The off color green band at the base of the leaf near the stem of the plant is the leaf collar. For example if a plant has three visible leaf collars, then it is described as the V3 leaf stage or vegetative 3 stage.
Wednesday, June 11, 2008
Bean Leaf Beetles
Bean leaf Beetle activity is alive and well in soybean fields. There are two generations of this beetle during the growing season. Beetles can be yellow, tan or red in color with distinct black triangular mark between the wing covers, behind the head (black spots may or may not be present on the wing covers). Damage occurs as a result of defoliation and pod feeding. Classic feeding damage on the leaves appears as a shot hole appearance. Economic threshold during the vegetative stage is 40% defoliation. Soybeans at this time are at the V2 growth stage. Continue to monitor fields at this point. Defoliation reports are from 1% to 25%.
Friday, June 6, 2008
2, 3, 4, even 7 inches of Rain. What to Expect?
Recent intense rainfall events (technically referred to as “toad stranglers” or “goose drownders”) have caused flooding of low-lying corn fields or ponding in poorly drained swales within fields. Other areas within fields, while not technically flooded or ponded, may remain saturated for lengthy periods of time. What are the prospects for recently submerged corn fields?For more information click here...http://www.agry.purdue.edu/ext/corn/news/timeless/PondingYoungCorn.html
10 Tips to Get the Most out of Your Sprayer
Dr. Erdal Ozkan
Extension Agricultural Engineer
Ohio State University
Paying attention to certain things will help you improve the accuracy and performance of your sprayer and save you money. Applying chemicals with a sprayer that is not calibrated and operated accurately could cause insufficient weed, insect or disease control which can lead to reduced yields. The following “Top Ten” list will help you improve the performance of your sprayer and keep it from failing you:
1) Check the gallon per acre application rate of the sprayer. This can only be determined by a thorough calibration of the sprayer. Use clean water while calibrating to reduce the risk of contact with chemicals. Read OSU Extension Publication AEX-520 for an easy calibration method (http://ohioline.osu.edu/aex-fact/0520.html).
2) How the chemical is deposited on the target is as important as the amount applied. Know what kind of nozzles are on your sprayer and whether or not their patterns need to be overlapped for complete coverage. Make sure the nozzles are not partially clogged. Clogging will not only change the flow rate, it also changes the spray pattern. Never use a pin, knife or any other metal object to unclog nozzles.
3) In addition to clogging, other things such as nozzle tips with different fan angles on the boom, and uneven boom height are the most common causes of non-uniform spray patterns. They can all cause streaks of untreated areas that result in insufficient pest control and economic loss.
4) Setting the proper boom height for a given nozzle spacing is extremely important in achieving proper overlapping. Conventional flat-fan nozzles require 30 to 50% overlapping of adjacent spray patterns. Flood-type nozzles require 50% overlapping. Check nozzle catalogs for specific recommendations for different nozzles.
5) Know your actual travel speed, and keep it steady as possible. Increasing the speed by 20% may let you cover the field quicker, but it also cuts the application rate by 20%. Similarly, a reduction of speed by 20% causes an over application of pesticide by 20%; an unnecessary waste of pesticides and money.
6) Pay attention to spray pressure. Variations in pressure will cause changes in application rate, droplet size and spray pattern. At very low pressures, the spray angle will be noticeably narrowed, causing insufficient overlap between nozzle patterns and streaks of untreated areas.
7) Don’t waste your chemical. After all, you have paid for it. Spray drift wastes more chemicals than anything else. Don’t spray when the wind speed is likely to cause drift. Don’t take the risk of getting sued by your neighbors because of the drift damage to their fields. Keep the spray pressure low if it is practical to do so, or replace conventional nozzles with low-drift nozzles. Use other drift reduction strategies: keep the boom close to the target, use drift retardant adjuvants, and spray in early morning and late afternoon when drift potential is less.
8) Carry extra nozzles, washers, other spare parts, and tools to repair simple problems quickly in the field.
9) Calibrate your sprayer periodically during spraying season to keep it at peak performance. One calibration per season is never enough. For example, when switching fields, ground conditions (tilled, firm, grassy) will affect travel speed which directly affects gallon per acre application rate. Be safe. Pesticides are poisons. Read the chemical and equipment instructions and follow them. Wear protective clothing, rubber gloves and respirators when calibrating the sprayer, doing the actual spraying and cleaning the equipment.
Extension Agricultural Engineer
Ohio State University
Paying attention to certain things will help you improve the accuracy and performance of your sprayer and save you money. Applying chemicals with a sprayer that is not calibrated and operated accurately could cause insufficient weed, insect or disease control which can lead to reduced yields. The following “Top Ten” list will help you improve the performance of your sprayer and keep it from failing you:
1) Check the gallon per acre application rate of the sprayer. This can only be determined by a thorough calibration of the sprayer. Use clean water while calibrating to reduce the risk of contact with chemicals. Read OSU Extension Publication AEX-520 for an easy calibration method (http://ohioline.osu.edu/aex-fact/0520.html).
2) How the chemical is deposited on the target is as important as the amount applied. Know what kind of nozzles are on your sprayer and whether or not their patterns need to be overlapped for complete coverage. Make sure the nozzles are not partially clogged. Clogging will not only change the flow rate, it also changes the spray pattern. Never use a pin, knife or any other metal object to unclog nozzles.
3) In addition to clogging, other things such as nozzle tips with different fan angles on the boom, and uneven boom height are the most common causes of non-uniform spray patterns. They can all cause streaks of untreated areas that result in insufficient pest control and economic loss.
4) Setting the proper boom height for a given nozzle spacing is extremely important in achieving proper overlapping. Conventional flat-fan nozzles require 30 to 50% overlapping of adjacent spray patterns. Flood-type nozzles require 50% overlapping. Check nozzle catalogs for specific recommendations for different nozzles.
5) Know your actual travel speed, and keep it steady as possible. Increasing the speed by 20% may let you cover the field quicker, but it also cuts the application rate by 20%. Similarly, a reduction of speed by 20% causes an over application of pesticide by 20%; an unnecessary waste of pesticides and money.
6) Pay attention to spray pressure. Variations in pressure will cause changes in application rate, droplet size and spray pattern. At very low pressures, the spray angle will be noticeably narrowed, causing insufficient overlap between nozzle patterns and streaks of untreated areas.
7) Don’t waste your chemical. After all, you have paid for it. Spray drift wastes more chemicals than anything else. Don’t spray when the wind speed is likely to cause drift. Don’t take the risk of getting sued by your neighbors because of the drift damage to their fields. Keep the spray pressure low if it is practical to do so, or replace conventional nozzles with low-drift nozzles. Use other drift reduction strategies: keep the boom close to the target, use drift retardant adjuvants, and spray in early morning and late afternoon when drift potential is less.
8) Carry extra nozzles, washers, other spare parts, and tools to repair simple problems quickly in the field.
9) Calibrate your sprayer periodically during spraying season to keep it at peak performance. One calibration per season is never enough. For example, when switching fields, ground conditions (tilled, firm, grassy) will affect travel speed which directly affects gallon per acre application rate. Be safe. Pesticides are poisons. Read the chemical and equipment instructions and follow them. Wear protective clothing, rubber gloves and respirators when calibrating the sprayer, doing the actual spraying and cleaning the equipment.
Monday, June 2, 2008
2008 Purdue Top Farmer Workshop
A new article entitled 2008 Top Farmer Crop Workshop—Adding Value to Every Acre You Farm has been posted to the TFCW site. You can access the article by clicking on Monthly Update on the main TFCW page: http://www.agecon.purdue.edu/topfarmer/update.asp
The 2008 workshop agenda is now posted on the Top Farmer web site (http://www.agecon.purdue.edu/topfarmer/conference.asp), as well as lodging, parking, registration, and other information. We hope you will find interesting and insightful what we have in store for you this year, and we look forward to seeing you in July! If you have attended in the past few years, you will be receiving a hard copy of the program with a registration form in the mail in the next few days. To reserve your spot now, go ahead and register on-line at : http://www.conf.purdue.edu/TOPCROP.
We are offering a $100 registration discount this year to first time attendees (applies to full registrations only). Use the discount code TCFIRST when you register on-line, write this code on the mail-in form, or mention this if you register via phone. We encourage you to forward this email to any of your farming colleagues that you think might benefit from this program.
Please don’t hesitate to contact us if you have any questions about this year’s program—and be sure to mark July 20 through 23 on your calendar.
The 2008 workshop agenda is now posted on the Top Farmer web site (http://www.agecon.purdue.edu/topfarmer/conference.asp), as well as lodging, parking, registration, and other information. We hope you will find interesting and insightful what we have in store for you this year, and we look forward to seeing you in July! If you have attended in the past few years, you will be receiving a hard copy of the program with a registration form in the mail in the next few days. To reserve your spot now, go ahead and register on-line at : http://www.conf.purdue.edu/TOPCROP.
We are offering a $100 registration discount this year to first time attendees (applies to full registrations only). Use the discount code TCFIRST when you register on-line, write this code on the mail-in form, or mention this if you register via phone. We encourage you to forward this email to any of your farming colleagues that you think might benefit from this program.
Please don’t hesitate to contact us if you have any questions about this year’s program—and be sure to mark July 20 through 23 on your calendar.
Effects of Climate Change on Agriculture
WASHINGTON, May 27, 2008 -- The U.S. Climate Change Science Program (CCSP) today released “Synthesis and Assessment Product 4.3 (SAP 4.3): The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity in the United States.” The CCSP integrates the federal research efforts of 13 agencies on climate and global change. Today’s report is one of the most extensive examinations of climate impacts on U.S. ecosystems. USDA is the lead agency for this report and coordinated its production as part of its commitment to CCSP.
“The report issued today provides practical information that will help land owners and resource managers make better decisions to address the risks of climate change,” said Agriculture Chief Economist Joe Glauber.
The report was written by 38 authors from the universities, national laboratories, non-governmental organizations, and federal service. The report underwent expert peer review by 14 scientists through a Federal Advisory Committee formed by the USDA. The National Center for Atmospheric Research also coordinated in the production of the report. It is posted on the CCSP Web site at:
http://www.climatescience.gov/Library/sap/sap4-3/default.php.
The report finds that climate change is already affecting U.S. water resources, agriculture, land resources, and biodiversity, and will continue to do so. Specific findings include:
Grain and oilseed crops will mature more rapidly, but increasing temperatures will increase the risk of crop failures, particularly if precipitation decreases or becomes more variable.
Higher temperatures will negatively affect livestock. Warmer winters will reduce mortality but this will be more than offset by greater mortality in hotter summers. Hotter temperatures will also result in reduced productivity of livestock and dairy animals.
Forests in the interior West, the Southwest, and Alaska are already being affected by climate change with increases in the size and frequency of forest fires, insect outbreaks and tree mortality. These changes are expected to continue.
Much of the United States has experienced higher precipitation and streamflow, with decreased drought severity and duration, over the 20th century. The West and Southwest, however, are notable exceptions, and increased drought conditions have occurred in these regions.
Weeds grow more rapidly under elevated atmospheric CO2. Under projections reported in the assessment, weeds migrate northward and are less sensitive to herbicide applications.
There is a trend toward reduced mountain snowpack and earlier spring snowmelt runoff in the Western United States.
Horticultural crops (such as tomato, onion, and fruit) are more sensitive to climate change than grains and oilseed crops.
Young forests on fertile soils will achieve higher productivity from elevated atmospheric CO2 concentrations. Nitrogen deposition and warmer temperatures will increase productivity in other types of forests where water is available.
Invasion by exotic grass species into arid lands will result from climate change, causing an increased fire frequency. Rivers and riparian systems in arid lands will be negatively impacted.
A continuation of the trend toward increased water use efficiency could help mitigate the impacts of climate change on water resources.
The growing season has increased by 10 to 14 days over the last 19 years across the temperate latitudes. Species’ distributions have also shifted.
The rapid rates of warming in the Arctic observed in recent decades, and projected for at least the next century, are dramatically reducing the snow and ice covers that provide denning and foraging habitat for polar bears.
USDA agencies are responding to the risks of climate change. For example, the Forest Service is incorporating climate change risks into National Forest Management Plans and is providing guidance to forest managers on how to respond and adapt to climate change. The Natural Resources Conservation Service and Farm Services Agency are encouraging actions to reduce greenhouse gas emissions and increase carbon sequestration through conservation programs. USDA’s Risk Management Agency has prepared tools to manage drought risks and is conducting an assessment of the risks of climate change on the crop insurance program.
For more information, please visit:
http://www.usda.gov/oce/global_change/
http://www.climatescience.gov/Library/sap/sap4-3/default.php or
http://www.sap43.ucar.edu/.
“The report issued today provides practical information that will help land owners and resource managers make better decisions to address the risks of climate change,” said Agriculture Chief Economist Joe Glauber.
The report was written by 38 authors from the universities, national laboratories, non-governmental organizations, and federal service. The report underwent expert peer review by 14 scientists through a Federal Advisory Committee formed by the USDA. The National Center for Atmospheric Research also coordinated in the production of the report. It is posted on the CCSP Web site at:
http://www.climatescience.gov/Library/sap/sap4-3/default.php.
The report finds that climate change is already affecting U.S. water resources, agriculture, land resources, and biodiversity, and will continue to do so. Specific findings include:
Grain and oilseed crops will mature more rapidly, but increasing temperatures will increase the risk of crop failures, particularly if precipitation decreases or becomes more variable.
Higher temperatures will negatively affect livestock. Warmer winters will reduce mortality but this will be more than offset by greater mortality in hotter summers. Hotter temperatures will also result in reduced productivity of livestock and dairy animals.
Forests in the interior West, the Southwest, and Alaska are already being affected by climate change with increases in the size and frequency of forest fires, insect outbreaks and tree mortality. These changes are expected to continue.
Much of the United States has experienced higher precipitation and streamflow, with decreased drought severity and duration, over the 20th century. The West and Southwest, however, are notable exceptions, and increased drought conditions have occurred in these regions.
Weeds grow more rapidly under elevated atmospheric CO2. Under projections reported in the assessment, weeds migrate northward and are less sensitive to herbicide applications.
There is a trend toward reduced mountain snowpack and earlier spring snowmelt runoff in the Western United States.
Horticultural crops (such as tomato, onion, and fruit) are more sensitive to climate change than grains and oilseed crops.
Young forests on fertile soils will achieve higher productivity from elevated atmospheric CO2 concentrations. Nitrogen deposition and warmer temperatures will increase productivity in other types of forests where water is available.
Invasion by exotic grass species into arid lands will result from climate change, causing an increased fire frequency. Rivers and riparian systems in arid lands will be negatively impacted.
A continuation of the trend toward increased water use efficiency could help mitigate the impacts of climate change on water resources.
The growing season has increased by 10 to 14 days over the last 19 years across the temperate latitudes. Species’ distributions have also shifted.
The rapid rates of warming in the Arctic observed in recent decades, and projected for at least the next century, are dramatically reducing the snow and ice covers that provide denning and foraging habitat for polar bears.
USDA agencies are responding to the risks of climate change. For example, the Forest Service is incorporating climate change risks into National Forest Management Plans and is providing guidance to forest managers on how to respond and adapt to climate change. The Natural Resources Conservation Service and Farm Services Agency are encouraging actions to reduce greenhouse gas emissions and increase carbon sequestration through conservation programs. USDA’s Risk Management Agency has prepared tools to manage drought risks and is conducting an assessment of the risks of climate change on the crop insurance program.
For more information, please visit:
http://www.usda.gov/oce/global_change/
http://www.climatescience.gov/Library/sap/sap4-3/default.php or
http://www.sap43.ucar.edu/.
Weather Trends for June
AgCrops Team Crop weather
May summary: It was a cool and damp month in most locations. Temperatures averaged several degrees below normal reducing evapotranspiration rates (which was a significant reduction). Rainfall was close to average with a tendency toward above normal rainfall in the south and normal in the north.
There were pockets of below average rainfall in central Ohio and far northwest Ohio and far northeast Ohio. Toledo and Columbus and Pittsburgh stations were below average, Dayton and Cleveland were near average and Cincinnati was above average. The cool weather which is very La Nina like made it seem much wetter of a month with little evapotranspiration.
June outlook: A change toward above normal temperatures is expected for June. Rainfall will be near average but that will come with high variability. It appears above normal rainfall is on tap in northern Ohio while a little below normal may occur in the south and average in between.
This week will see the best chances for rain especially north of I-70 Tuesday/Wednesday. Temperatures will reach 85-93 Thu/Fri. The high soil moisture content will keep temperatures from getting too high (a good thing). Next week will see highs mostly in the 80s, a few 90s far south. A few rain chances early and late in the week again especially in the north.
The following week will see more isolated storms with warm weather.
Source: James Noel, NOAA, Wilmington, Ohio
James.Noel@noaa.gov
May summary: It was a cool and damp month in most locations. Temperatures averaged several degrees below normal reducing evapotranspiration rates (which was a significant reduction). Rainfall was close to average with a tendency toward above normal rainfall in the south and normal in the north.
There were pockets of below average rainfall in central Ohio and far northwest Ohio and far northeast Ohio. Toledo and Columbus and Pittsburgh stations were below average, Dayton and Cleveland were near average and Cincinnati was above average. The cool weather which is very La Nina like made it seem much wetter of a month with little evapotranspiration.
June outlook: A change toward above normal temperatures is expected for June. Rainfall will be near average but that will come with high variability. It appears above normal rainfall is on tap in northern Ohio while a little below normal may occur in the south and average in between.
This week will see the best chances for rain especially north of I-70 Tuesday/Wednesday. Temperatures will reach 85-93 Thu/Fri. The high soil moisture content will keep temperatures from getting too high (a good thing). Next week will see highs mostly in the 80s, a few 90s far south. A few rain chances early and late in the week again especially in the north.
The following week will see more isolated storms with warm weather.
Source: James Noel, NOAA, Wilmington, Ohio
James.Noel@noaa.gov
Wheat Pollination
This is a critical time to scout wheat fields for disease and insects. Pollination is occuring in wheat fields throughout Ross and surrounding counties. See the latest issue of the C.O.R.N. newsletter for cereal leaf beetle larvae control as several other timely crop issues.
Subscribe to:
Posts (Atom)
