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.
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
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
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
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
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
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
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