Category Archives: Corn

Fall Armyworms Look to Make and Early Start (again)

Author: Scott Stewart, IPM Extension Specialist Comments Off on Fall Armyworms Look to Make and Early Start (again)

It seems that fall armyworms have gotten a running start in recent years. This species does not overwinter in Tennessee, but it may survive warm winters in the extreme southern areas of coastal states during mild winters. It migrates into Tennessee each year. Often, fall armyworms don’t show in substantial numbers until late July or August. However, they are being found Continue reading

Print Friendly, PDF & Email

Irrigation for Corn and Soybeans

Author: Angela McClure, Extension Corn and Soybean Specialist Comments Off on Irrigation for Corn and Soybeans

Warm weather and high heat indexes mean farmers are irrigating fields that have missed rain recently. It is important to consider crop stage and utilize available soil sensor data to make the best decision on when and how much water to apply.  Continue reading

Print Friendly, PDF & Email

Don’t freak out about Japanese beetles

Author: Scott Stewart, IPM Extension Specialist Comments Off on Don’t freak out about Japanese beetles

They’re back, but they don’t scare me! It is very unusual to see economic damage from Japanese beetles in cotton, soybean, or corn. They may cause defoliation in all crops. I’ve never seen enough defoliation in cotton or corn to justify treatment. On a few occasions, I’ve seen enough defoliation in soybean to catch my attention. They will hang around for a while, so in combination with other defoliators, they may cause enough damage Continue reading

Print Friendly, PDF & Email

New Search Option for UT Variety Test Data

Author: Angela McClure, Extension Corn and Soybean Specialist Comments Off on New Search Option for UT Variety Test Data

The University of Tennessee Variety Testing team is pleased to announce the launch of a new search tool for yield and agronomic data for corn grain and silage, cotton, soybeans and wheat. Continue reading

Print Friendly, PDF & Email

Southwestern Corn Borer in Non-Bt Corn

Author: Scott Stewart, IPM Extension Specialist Comments Off on Southwestern Corn Borer in Non-Bt Corn
SWCB Larva (click to enlarge)

Moth traps catches clearly indicate that the first generation flight is peaking (link to moth trap catches). Local moth catches may vary considerably, and that is why we suggest running pheromone traps on your farm if you are growing non-Bt corn. The highest trap catches are on farms in U.S. Fish and Wildlife Refuges, primarily because they are not allowed to grow Bt corn. Please link to the publication below for more information about the management of this pest.  Below, I’ve also provided the suggested treatment threshold for southwestern corn borers in non-Bt corn during the whorl stage. Continue reading

Print Friendly, PDF & Email

Management of Late Season Johnsongrass

Author: Larry Steckel, Extension Weed Specialist Comments Off on Management of Late Season Johnsongrass
Photo credit: Todd Rankin

Questions continue to arise on management of glyphosate-resistant (GR) Johnsongrass in corn, soybean and cotton. GR Johnsongrass continues to become more of an issue with each passing year.  The main threat with Johnsongrass is in corn where there are few POST applied options. Continue reading

Print Friendly, PDF & Email

Moth Trapping Data

Author: Scott Stewart, IPM Extension Specialist Comments Off on Moth Trapping Data

This is a reminder that moth trapping data for corn earworm (bollworm), tobacco budworm, and southwestern corn borer will be posted weekly during the summer. You can open the Excel file under the Quick Link menu on the left or directly at this link – http://www.utcrops.com/BlogStuff/2017MothTrappingData.xls. A few southwestern corn borers were caught this week, indicating the first generation is starting, perhaps just a little earlier than usual. Generally low numbers of corn earworm and tobacco budworm moths were also caught last week.

Print Friendly, PDF & Email

Corn Planting Winding Down

Author: Angela McClure, Extension Corn and Soybean Specialist Comments Off on Corn Planting Winding Down

April and May weather have not supported long stretches of field work, and some producers report not planting as much corn as intended.  Have had discussions about how late to continue to plant corn  since we are past the early window for what is usually optimal yield.   Continue reading

Print Friendly, PDF & Email