A friend of mine was to a seminar this winter and the speaker recommended not spraying an insecticide when spraying fungicide on corn. It will make the fungicide less effective. I've looked around on the web a little and have found nothing to back it up. Has anyone heard of this before? It is pretty common to throw some insecticide with the fungicide around here especially with all the corn on corn.
Fungicide/insecticide interaction question
