Category Archives: Corn

Heat unit accumulation during 2017

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Heat unit accumulation during 2017

Heat unit accumulation has been the big question over the past week.  Mild temperatures settled over Tennessee during early August and there is some concern that the crop may not be maturing as quickly as noted in years past.  While I agree the weather has been quite comfortable, we are currently very close to the 30 year average heat unit accumulation trend noted from 1980-2010.

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Consider Establishing a Cover Crop this Fall

Author: Drake Copeland 1 Comment
Soybeans in a cereal rye cover crop

PPO-resistant Palmer amaranth has required growers to adapt to an integrated weed control approach with the assistance of the new technologies available. The adoption of cover crops in the state has shown to be a major tool for successfully controlling Palmer amaranth. Furthermore, Palmer amaranth infested fields in Tennessee are cleaner this year compared to the last decade. Continue reading

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Heat stress on its way

Author: Avat Shekoofa, Crop Physiologist Comments Off on Heat stress on its way

The three-month outlook for July, August, and September currently depicts enhanced odds of warmer than normal temperatures. Meanwhile, the precipitation outlook for the same three-month time period places the region in an area of equal chances of above, near, or below normal precipitation totals (see the map). Continue reading

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Moth traps and southwestern corn borers

Author: Scott Stewart, IPM Extension Specialist Comments Off on Moth traps and southwestern corn borers

As always, moth trapping data for the season can be found on the quick links menu (http://www.utcrops.com/BlogStuff/2017MothTrappingData.pdf). We are now catching a few more corn earworm (bollworm) moths, but nothing too startling. However, it is clear that the second generation moth flight for southwestern corn borer is underway, and we will catch even more moths next week. Keep in mind that there is a lot of variation among locations. It can be a waste of money to treat for southwestern corn borers based on trap catches that are not near your fields. You should be running a few Continue reading

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Corn Southern Rust Confirmed in west Tennessee

Author: Angela McClure, Extension Corn and Soybean Specialist Comments Off on Corn Southern Rust Confirmed in west Tennessee

With the continued wet and warm weather, it didn’t take long to identify Southern rust in some Madison county corn, and additional fields are being scouted this week.  Continue reading

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Corn Southern rust still not confirmed in Tennessee

Author: Angela McClure, Extension Corn and Soybean Specialist Comments Off on Corn Southern rust still not confirmed in Tennessee

I wanted send out a brief update on corn disease progress as of the end of June.  We are scouting fields regularly now and with storms blowing into the state from south and west, a number of corn leaves where Southern rust was suspected have been brought to the lab here in Jackson. Continue reading

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Foliar Diseases and Fungicide Applications in Corn

Author: Heather Marie Kelly, Extension Plant Pathologist Comments Off on Foliar Diseases and Fungicide Applications in Corn

Trying to decide whether or not to spray fungicide on your corn? First, you should scout for diseases and consider your disease risk. Southern rust has been reported in TX, MS, AL, AR, GA, and FL and with the tropical storm there is a good chance spores have been blown in to TN and the wet, overcast weather provides the perfect environment for disease development. Continue reading

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