Category Archives: Diseases

Preliminary UT Cotton Variety Strip Trial Data Now Available

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Preliminary UT Cotton Variety Strip Trial Data Now Available

By Tyson Raper and Ryan Blair

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The University of Tennessee Cotton Agronomy Program provides an unbiased evaluation of experimental and commercial varieties available for production in Tennessee each year. The 2016 program consisted of Continue reading

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Wrapping up harvest aid applications in 2016

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Wrapping up harvest aid applications in 2016

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We have been blessed with another great harvest season and it appears we may be able to finish harvest with little rain.  Here on the 5th day of Oct, I would guess the average cotton acre within the state has already received the first application of harvest aids and is very close to seeing a picker.  Even so, several acres have not been defoliated.  This has led many to call with concerns about the cooler temperatures in the forecast over the weekend and several have asked if it is simply time to defoliate based on calendar date.   Continue reading

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A year for disease – soybean diseases at higher levels

Author: Heather Marie Kelly, Extension Plant Pathologist Comments Off on A year for disease – soybean diseases at higher levels

While the earliest planted and maturity soybeans are drying down and being harvested many later planted and maturity soybeans are exhibiting multiple diseases and some pre-mature defoliation may be occurring due to diseases. Continue reading

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2016 Mid-South Cotton Defoliation Guide

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on 2016 Mid-South Cotton Defoliation Guide

defolguideTennessee’s 2016 cotton crop is rapidly maturing and many of our acres will receive the first shot of defoliant in the next week.  There are many factors to consider in determining timing, products and rates.   In an effort to outline these decisions and provide harvest aid recommendations for the Mid-South, the 2016 Mid-South Cotton Defoliation Guide has just been updated and is now available online.   To access the guide, click the image above or the included link.  Please keep in mind that this was compiled as a regional guide and should be used in conjunction with your previous experiences. Continue reading

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Target Spot and Boll Drop – The Knowns and Unknowns

Author: Heather Marie Kelly, Extension Plant Pathologist Comments Off on Target Spot and Boll Drop – The Knowns and Unknowns

Authored by Heather M. Kelly, Extension Plant Pathologist and Tyson Raper, Cotton and Small Grains Specialist

The abnormally warm and wet conditions in the Mid-South during August have contributed to the highest level of target spot-driven defoliation in commercial fields to date. Still, the majority of Tennessee’s cotton will not see a yield penalty from the disease due to a late onset and very low levels of defoliation.  Continue reading

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Soybean Rust Detected in Middle Tennessee

Author: Heather Marie Kelly, Extension Plant Pathologist Comments Off on Soybean Rust Detected in Middle Tennessee

A sample from the soybean sentinel plot in Coffee County collected August 29th contained very low levels of soybean rust. Late planted soybeans in the area are at risk and would benefit from a fungicide application. Continue reading

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Cotton turning . . . too soon?

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Cotton turning . . . too soon?

IMG_4307The call of the week (beyond target spot) has concerned cotton ‘turning’.  In the dictionary of cotton rhetoric, ‘turning’ refers to the shift in canopy color from dark green to shades of yellow and red, or senescence, which usually coincides with the second or third week of football season.  Over the past week, the crop has definitely made a turn towards finishing out the season .  . .  and kickoff for the first game is still a few days away. The general concern is this change has occurred much more rapidly and earlier than we would like.  So are we looking at premature senescence and yield penalties? Continue reading

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