ArticleJournal of insect science (Online)2026
Laboratory and field suppression of cowpea thrips by Chrysopa formosa (Neuroptera: Chrysopidae) and predator viability at high temperature.
Article in Journal of insect science (Online), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The recent outbreaks of thrips in subtropical and tropical regions of the world caused serious economic losses. This has increased interest in releasing predatory insects to manage thrips in cowpea and other important crops. Therefore, we assessed the potential of the green lacewing, Chrysopa formosa Rambur (Neuroptera: Chrysopidae), a generalist predator, for controlling Megalurothrips usitatus Bagnall (Thysanoptera: Thripidae) and Frankliniella intonsa Trybom (Thysanoptera: Thripidae), the 2 major pests of cowpea in South China. Chrysopa formosa larvae displayed a type III functional response to M. usitatus. The theoretical maximum predation of a C. formosa third instar larvae on M. usitatus second instar nymphs and adults was 1054 and 570, respectively. The C. formosa second instar larvae consumed more than 71% of a mixed population of M. usitatus and F. intonsa in a cowpea field by 14 days after release. The predation of C. formosa on M. usitatus increased as the temperature increased from 15 °C to 35 °C, whereas the predator developed slower above 25 °C. There was no significant difference in the hatch of C. formosa eggs kept at 25 °C and 30 °C, and the survival of first to third instar C. formosa larvae maintained at 25 °C was more than 80%. Thus, C. formosa can effectively suppress M. usitatus and F. intonsa in cowpea.
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