There is a 50 day preharvest interval, and growers must be alerted in writing by applicators to the fact that no tolerance has been established yet for residues on the crop. EPA assures the CDA that a tolerance will be established prior to harvest, but it is the grower's risk if EPA does not fulfill this assurance and the treated crop is subject to further action by the Food and Drug Administration. Once red rust infection is confirmed, currently only Kit Carson County, the Section 18 use will be activated. Several pests can affect wheat in the fall. These include Banks grass mite, brown wheat mite, grasshoppers, greenbug and other cereal aphids, Russian wheat aphid, and wheat curl mite.
Banks grass mite commonly moves into the margins of newly planted wheat fields from adjacent corn.
This easily can result in the loss of several rows of plants, particularly if warm dry weather persists after crop emergence. Banks grass mite produces heavy webbing to protect colonies consisting of eggs, immatures and adults. Colonies usually are found on the undersides of leaves. Damaged leaves first become yellow, then brown and necrotic. Heavy populations can kill small plants and reduce kernel size in larger plants.