Scout for western bean cutworm, western corn rootworm in Ohio
As the corn in Ohio enters the tasseling and pollination stage, there are two insects that should be watched. However, both need to be scouted before tank mixing an insecticide with a fungicide spray gives a good return.
First, the amount of western bean cutworm adults in our traps is still on the rise, although we have probably reached peak flight (we won’t know for sure until the numbers go down). This is the time period when producers will want to scout for egg masses on the upper 2-3 leaves.
Remember that economic threshold is only 5-8% of corn with egg masses. Although we have not yet had economic damage from WBC, it is still important to look for the presence of eggs before any applications should be made.
Second, growers may be seeing more western corn rootworm adults. For the past few years, we haven’t had to deal much with this pest, but we have received a fair amount of calls regarding leaf stripping and the potential for silk clipping. Both types of damage on corn are rare for Ohio.
For leaf stripping, this is usually not economic, but could be an indication of population sizes the following year.
There are a few considerations before spraying to prevent silk clipping. First–silks must still be viable, in other words have not begun to turn brown; second–5 or more beetles per silk mass must be present; third–silks are being clipped to less than 1/2 inch.
If all three of these conditions are met, control may be needed.
- Alltech Crop Science acquires South African distributor
- Monsanto invests to transform plant breeding
- Fungicide-resistant soybean diseases spreading
- Most crop futures are starting Thursday on a strong note
- Initiatives attack biotech on ballots in Colorado, Oregon, Maui
- Commentary: Ag’s leading role in the international marketplace
- ValueAct buys stake in fertilizer dealer Agrium
- Critics of Dow herbicide sue U.S. EPA over approval
- Six tips to help professionals take leaps of faith
- Nitrogen fertilization rates for corn production
- Landmark Services Co-op, Curry Seeds sign agreement
- No-till may not bring boost in global crop yields
- Los Angeles City Council votes to explore ban on GMO plants
- ASA issues statement on EPA’s neonicotinoid study
- Economist: Taxing P could reduce risk of algal blooms
- Commentary: Government wants farmers to quit farming
- Resistant weeds not controlled by fall residuals
- First responders need to prepare for agroterrorism