SANITATION. Thoroughly clean all grain residues from bins. Remove all residues from areas around the bins and any nearby feed bunks or feed storage areas. Remove all grain residues from combines, trucks, and augers. These residues will be the main sources of insect infestations for farm stored grain. This is a very important part of a good grain management program and can prevent many stored grain insect problems.
RESIDUAL SURFACE SPRAYS TO EMPTY BIN. After all debris and grain residues have been removed, a residual insecticide should be sprayed to the entire inside of the bin. This insecticide should also be applied around the exterior and to all areas where residues were removed. Spray all surfaces until wet; usually one gallon will cover 1,000 square feet. Use a course spray at a pressure of at least 30 psi. Insecticides are most effective if temperatures are 60F or higher. The labeled effective compounds are:
PROTECTANTS FOR APPLICATION TO GRAIN. If grain is to be held in storage into the summer months of the year following harvest or longer, then a grain protectant applied at harvest is recommended. Formulated sprays, drips or dusts are typically applied to moving grain stream as it goes into storage vessel.
SURFACE TREATMENTS OR TOPDRESSING AFTER BIN FILL IS COMPLETE. Fill bins only to height of side walls and level grain prior to applying surface or top-dress insecticide treatments.
GRAIN FUMIGANTS. Recommend use of commercial pest control specialist when using grain fumigants for stored grain insect control.
MONITORING FOR INSECT PESTS IN STORED GRAIN Bins should be monitored every one to two weeks when grain mass temperature is above 60F and every two to four weeks when grain temperature is below 60F. Monitoring is best achieved using plastic tube traps which are inserted into the grain mass for a certain period of time and then retrieved (see trap label for specific instructions). This type of trap will attract insects and help determine the kind and number of insects present in the grain mass. Be sure to cool grain mass in fall to 60F or less to prevent insect activity. In the spring the grain mass should be warmed to average outside temperatures to prevent condensation and subsequent moisture damage to grain in contact with bin walls.
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REVISED: October 2, 2015