A large portion of the north Florida grain sorghum crop was planted late this year.
And we are finding that much of the later planted crop is under pressure from insect pests.
We usually experience the first freeze in late November and have plenty of time to make a crop after spring vegetables or corn silage harvest.
We should plan to protect this grain until about mid-dough stage. The caterpillars should not be much of a problem after that time, because they are less attracted to the plant and they can also cause less yield reduction at that stage.
We are finding many sorghum webworms in this crop. They are tough to find hiding in the head when they are small, but are usually found in very large numbers when present. Farmers are reporting 15-20 per head. The economic threshold is actually 5 per head.
Continue reading here: Check late sorghum for pests.