Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China.
International Research Center for Environmental Membrane Biology & Department of Horticulture, Foshan University, Foshan, China.
Pest Manag Sci. 2023 Jun;79(6):2172-2181. doi: 10.1002/ps.7396. Epub 2023 Feb 21.
Fruit flies are important economic pests of fruits, vegetables, and nuts all over the world. In this study, a permanent ecological trap, which was created by the ovicidal effect of phytogenic hydrogen cyanide (HCN) liberated from passion fruits due to oviposition by fruit flies and can be used in the pest management, were determined.
Observation of fruit fly eggs in Passiflora within the passion fruit cultivation region in southern China, from Aug 2019 to Oct 2020 showed that the exotic Passiflora attracted the native fruit flies to oviposit, but the eggs could not hatch. Using classical staging to categorize embryonic development and fumigation assays, we show that oviposition by fruit fly on passion fruits, release HCN from the cyanogenic mesocarp. Exposure of the eggs to HCN causes arrest of embryonic development and finally the death of eggs.
Our results reveal that the life cycle of fruit fly in Passiflora is interrupted at the egg stage. Consequently, we predict that this ecological trap may be permanent. Extensive cultivation of the Passiflora vine as a dead-end trap crop may be an effective avenue to reduce populations of fruit fly pests. © 2023 Society of Chemical Industry.
实蝇是世界范围内水果、蔬菜和坚果的重要经济害虫。在本研究中，确定了一种由百香果释放的植物源氰化氢（HCN）的杀卵作用产生的永久性生态陷阱，该作用是由于实蝇产卵而产生的，可以用于害虫管理。
2019 年 8 月至 2020 年 10 月在中国南方百香果种植区观察到的百香果中的实蝇卵表明，外来的百香果吸引了本地实蝇产卵，但卵不能孵化。通过经典分期来分类胚胎发育和熏蒸测定，我们表明实蝇在百香果上产卵会从氰苷中释放 HCN Mesocarp。卵暴露于 HCN 会导致胚胎发育停止，最终导致卵死亡。
我们的结果表明，实蝇在百香果中的生命周期在卵期被中断。因此，我们预测这种生态陷阱可能是永久性的。广泛种植百香果作为死胡同诱捕作物可能是减少实蝇害虫种群的有效途径。 © 2023 化学工业学会。
