Cutworm in Corn
Black Cutworm – This is probably our main concern over the next month. Numerous fields being planted have significant weed growth, especially of chickweed. These fields are especially attractive to female moths for egg laying. Because of the small size of the corn for the next few weeks, the crop will be very susceptible to injury by cutworms if they are present. Although a few of the transgenic proteins should offer control, we would remind growers that not all trangenics do, nor do the various seed treatments. Growers are urged to scout their corn for the next month and take action if cutworm cutting is present at the appropriate levels for the size of your corn. See the fact sheet http://ohioline.osu.edu/ent-fact/pdf/0035.pdf for more information, and http://entomology.osu.edu/ag/images/Corn_2013_BCW.pdf for insecticide choices.
Bean Leaf Beetles – With most soybean fields finally being planted across the state, and relatively late at that, our hope is that the overwintered adult population should disperse themselves over a lot of fields, thus resulting in lower populations in most fields to start the growing season with. However, if there are growers who were able to get in early planted fields a few weeks ago, they should realize that they might be some of the few soybean fields emerged their area. If so, these fields might receive more adult beetles than usual. Growers, if they happen to have early planted fields emerging, before other fields in their area, should scout those fields with more diligence.
Slugs – As mentioned in a previous newsletter, the small size of both soybean and corn will lead to a greater damage potential from slugs. Keep a close eye on those fields with a previous history of slug problems.
Wheat Insects – Although no problems are yet being received, growers should monitor their fields for cereal leaf beetle larvae followed by possible true armyworm infestations. Timing is good for scouting knowing we will be going into the flag leaf stages.
Alfalfa Weevil – Problems are still being reported across the state on alfalfa. Remember if the alfalfa is reaching 15 to 20 inches in height, early cutting should be considered. If smaller, insecticide applications should still be considered.
Source : osu.edu