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Oral Presentation
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Poster Display

Plant-Insect Ecosystems

Poster: PBT, Biochemistry and Chemical Ecology

A novel Cry89A provides efficacy against several key lepidopteran maize pests

Tuesday, November 11, 2025
9:00 AM - 5:00 PM Pacific
Location: Exhibit Hall A-A1, OCC
Poster Display
Cry89Aa1 is a novel insecticidal protein with significant activity against key lepidopteran pests. Activity was observed against fall armyworm, Spodoptera frugiperda J. E. Smith, and corn earworm, Helicoverpa zea Boddie in diet bioassays, but the native protein was not naturally potent enough to control S. frugiperda in in planta assays. Engineered variants of Cry89 have provided increased insecticidal efficacy against key maize (Zea mays L.) pests, including Cry1F and Vip3A resistant S. frugiperda strains. Beyond S. frugiperda control, this protein shows strong control of southern armyworm, Spodoptera eridania Cramer, corn earworm, and soybean looper, Chrysodeixis includens Walker in diet bioassays.