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Inoculative releases of Trichogramma dendrolimi for suppressing the oriental fruit moth (Grapholita molesta) in peach orchard in China

文献类型： 外文期刊

作者： Li, Jie 1 ; Zhao, Longlong 1 ; Li, Yang 2 ; Zhao, Zhiguo 2 ; Ma, Ruiyan 2 ;

作者机构： 1.Shanxi Acad Agr Sci, Pomol Inst, Jinzhong 030815, Shanxi, Peoples R China

2.Shanxi Agr Univ, Coll Agr, Jinzhong 030801, Shanxi, Peoples R China

关键词： China;peach (Prunus persica);oriental fruit moth (Grapholita molesta);Trichogramma dendrolimi;biological control;orchard pest management

期刊名称：FRUITS （ 影响因子：0.8； 五年影响因子：1.107 ）

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收录情况： SCI

摘要： Introduction. Integrated pest management is becoming popular in China. To supply safe peach fruits (Prunus persica cv. Okubo) to the population and to preserve the environment, this study aimed to investigate the biological control of Grapholita molesta (oriental fruit moth, OFM) using Trichogramma dendrolimi and to discuss how to effectively use this wasp for managing OFM. Materials and methods. T. dendrolimi was released with 1-week frequency at different release distances (5.0, 7.5, 10.0, 12.5 and 15.0 m) in 5 experimental plots, and the wasp density was surveyed after release. The OFM adult number, effective wilting shoot number, and damaged peach number were surveyed twice. Results and discussion. T dendrolimi was the dominant natural enemy of OFM in the peach orchard. Wasp density was reduced in a release distance-dependent manner in the treated plots and was much lower than that in the control plots. The OFM adults of the 2nd generation were not obviously suppressed by T dendrolimi. Compared with the control plot, the numbers of effective wilting shoots and damaged peaches were significantly reduced by releasing wasps (P < 0.05), especially in the 15 m release plot. However, there was no significant difference in the density of the wasps during the two surveys, the rate of increase of the number of effective wilting shoots, the rate of decrease of the number of damaged peaches or the number of OFM adults. Conclusion. The inoculative release of T dendrolimi is an effective and safe approach to inhibiting OFM population. Moreover, releasing the wasps at a distance of 15 m is strongly recommended in practice.

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