By Dave Nanda, Ph.D., Director of Genetics and Technology for Seed Consultants, Inc.
One of my customers producing non-GMO corn for premium recently expressed some concerns that later planted corn will get more corn borers. Should he switch to a Bt hybrid?
It is known that late plantings of corn are more subject to corn borer infestation than earlier plantings. However, those fields are more vulnerable when everything else around them is planted earlier. Then the moths are attracted to the later-planted fields because they prefer that stage for laying eggs.
One should also consider how often the corn borer is an economic factor. While it’s a factor almost every year in Iowa and the western Corn Belt, it’s a major factor only two to three years out of 15 in Indiana and Ohio. The risk of corn borer pressure would be higher this year due to later planting of all corn, but risk is relative and difficult to quantify.… Continue readingRead More »