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ViewAttendees 13

P-IE

10-Minute Paper

10-min: P-IE, Horticultural IPM

Chlorantraniliprole susceptibility in fall armyworm populations infesting sweet corn in southern Florida

On-Demand
On-Demand
The fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), is a major insect pest of sweet corn in southern Florida. Management in this system has relied exclusively on insecticides, including the diamide chlorantraniliprole. Thus, the development of insecticide resistance is a concern. Diet-incorporation bioassays conducted in 2018 and 2019 determined chlorantraniliprole susceptibility in five fall armyworm populations collected in sweet corn in southern Florida. Based on LC50s, these field populations were 10 to 27 times less susceptible than a susceptible laboratory population. However, field evaluations determining the efficacy of chlorantraniliprole foliar applications to complement the bioassays showed that the insecticide remains effective for fall armyworm control.