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Identification of a potent attractant and oviposition stimulant blend for Bactrocera dorsalis for sustainable pest management
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Identification of a potent attractant and oviposition stimulant blend for Bactrocera dorsalis for sustainable pest management
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Journal Article
Identification of a potent attractant and oviposition stimulant blend for Bactrocera dorsalis for sustainable pest management
2025
Overview
Bactrocera dorsalis
is a major pest causing economic losses in fruit and vegetable production. Current control methods, such as synthetic pesticides and male annihilation techniques, have drawbacks, including health risks, resistance development, and ineffectiveness against females. This study investigates the attractions and oviposition stimulant activities of five common volatiles—[isobutyl acetate (A), isoamyl acetate (B), isobutyl butyrate (C), isoamyl isovalerate (D), and isoamyl butyrate (E)]—from the most preferred hosts: mango, guava, orange, and banana. These volatiles were tested at three different concentrations, both individually and in complex blends. Choice tests were performed using a Y-tube olfactometer and Petri plate with agarose assays, and antennal responses were determined using electroantennogram (EAG) recordings. Among them, a blend comprising 1.25% isoamyl acerate (10.95 µg/µl), 1.25% isoamyl isovalerate (10.75 µg/µl), and 20% isoamyl butyrate (172.40 µg/µl) (B1D1E3) emerged as the most potent attractant for both sexes and oviposition stimulant for females. Moreover, combining B1D1E3 with mango, banana, or orange juice significantly enhanced egg-laying behavior. Electrophysiological recordings supported these findings, with B1D1E3 eliciting the strongest antennal responses. Results suggest B1D1E3 could be used to elicit strong oviposition responses in mass rearing of
B. dorsalis
for the Sterile Insect Technique.
