Another trial compared populations in sorghum-sudangrass and in mixtures of sorghum-sudangrass with buckwheat ( Fagopyrum esculentum Moench) or pearl millet ( Cenchrus americanus (L.) Morrone). Field experiments had plots planted with corn ( Zea mays L.), sorghum-sudangrass, a standard cover crop in Florida, and two alternative cover crops, sunn hemp ( Crotalaria juncea L.) and cowpea. MethodsĪ series of field experiments and a laboratory feeding study were conducted to compare infestation and feeding and of fall armyworm on different cover crop plants. Our objective was to use multi-year studies to compare fall armyworm populations that develop in cover crop plants. Before migrating in spring, it feeds on cover crops in central and eastern Florida and expands its populations. This caterpillar pest feeds on and damages row, turf and vegetable crops in the eastern and central U.S. Smith) is a migratory moth that annually migrates northward each spring from sites in southern Florida and southern Texas.
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