Abstract:
【Objective】To make clear the natural enemy species of
Diaphorina citri in Nanning, and to investigate the correlation between quantity of
D. citri and the number of natural enemy, so as to provide a basis for the control of
D. citri by natural enemies.【Method】From August 2020 to July 2021, natural enemy species of
D. citri were investigated by random sampling method and the number of predatory natural enemies and parasitism ratio of parasitic natural enemies were counted once every 15 days at the
Murraya paniculata var. exotica hedgerow without chemical pesticide spraying in the Multi-functional Garden and citrus trees(
Citrus reticulate cv. Shatangju) in Guangxi Innovationdriven Special Base of the farm in Guangxi University.【Result】A total of 15 natural enemies of
D. citri were found in Nanning, in which 9 species of natural enemies belonged to Insecta:
Menochilus sexmaculata,
Propylea japonica,
Lemnia biplagiata,
Oenopia chinensis,
Harmonia axyridis,
Chrysoperla sinica,
Tamarixia radiate,
Diaphorencyrtus aligarhensis and
Marietta picta. And 6 species of natural enemies belonged to Arachnid:
Phintella vittata,
Thomisus labefactus,
Rhene rubigera,
P. versicolor,
Oxyopes sertatus and
Anystis baccarum. A parasitic wasp of
T. radiate,
Psyllaphycus diaphorinae was found.【Conclusion】There are 15 natural enemies of
D. citri in Nanning, and the dominant predatory natural enemy is
M. sexmaculata and the dominant parasitic natural enemy is
T. radiate.