Publications by authors named "Paula G Marcon"
During 2021 and 2022, eight field-collected and five laboratory strains with varying susceptibility to different Bt proteins were evaluated for their responses against HearNPV using diet-overlay bioassays. The five laboratory strains included SS (susceptible to all Bt proteins), CRY-RR (resistant to Cry1 and Cry2), VIP-RR-70 (resistant to Vip3Aa), VIP-RR-15 (resistant to Vip3Aa), and TRE-RR (resistant to Cry1, Cry2, and Vip3Aa). Our findings showed that the susceptibility of TRE-RR, VIP-RR-70, and VIP-RR-15 strains to HearNPV was similar to that of the SS strain.
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- * A study tested the susceptibility of Hübner (a pest affecting soybean and cotton) to HearNPV, establishing a diagnostic concentration for monitoring pest populations and assessing any potential cross-resistance with certain insecticides.
- * The findings indicated low variation in susceptibility to HearNPV across different populations, with high mortality rates at the tested concentration, and no cross-resistance with flubendiamide or indoxacarb, suggesting HearNPV as a potent tool in pest management strategies.
Background: Development of pyriproxyfen and neonicotinoid resistance in the B-biotype whitefly and recent introduction of the Q biotype have the potential to threaten current whitefly management programs in Arizona. The possibility of integrating the novel anthranilic diamides chlorantraniliprole and cyantraniliprole into the current program to tackle these threats largely depends on whether these compounds have cross-resistance with pyriproxyfen and neonicotinoids in whiteflies. To address this question, the authors bioassayed a susceptible B-biotype strain, a pyriproxyfen-resistant B-biotype strain, four multiply resistant Q-biotype strains and 16 B-biotype field populations from Arizona with a systemic uptake bioassay developed in the present study.
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- - Chlorantraniliprole is a new insecticide effective against various pest species, including lepidopterans and some others, and its speed of action was tested against seven commercial insecticides using larval feeding bioassays.
- - Results indicate that chlorantraniliprole acts quickly to stop feeding and reduce damage, ranking among the fastest options alongside other established insecticides like methomyl and lambda-cyhalothrin, while outperforming several newer products.
- - This insecticide not only has a fast mode of action comparable to traditional carbamates and pyrethroids but also boasts a favorable safety profile, making it a promising choice for integrated pest management, especially against resistant insect populations.