Across the corn belt depending on time of year | It is all about resistance management if you are referencing Biocontrol Nematodes for rootworm control.
Single application => multiyear activity. So why not protect your investment by using a dual toxin management strategy?
BTW: soil insecticides only protect crop standability for harvest and do not kill many rootworms. That is why more rootworms emerge from an insecticide treated field than an untreated field. Soil insecticide applied to the seed furrow protects the food source (roots) for the rootworm larvae out in the row. |