Potato/Maize intercropping reduces infestation of potato tuber moth, Phthorimaea operculella(Zeller) by the enhancement of natural enemies  

作　　者：ZHENG Ya-qiang ZHANG Li-min CHEN Bin YAN Nai-sheng GUI Fu-rong ZAN Qing-an DU Guang-zu HE Shu-qi LI Zheng-yue GAO Yu-lin XIAO Guan-li 

机构地区：[1]State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan,Yunnan Agricultural University,Kunming 650201,P.R.China [2]College of Agriculture&Biology Technology,Yunnan Agricultural University,Kunming 650201,P.R.China [3]State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第2期394-405,共12页农业科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2018YFD0200703 and 2018YFD0200802);the National Natural Science Foundation of China (3176059 and 31660537)

摘　　要：The potato tuber moth(PTM),Phthorimaea operculella(Zeller),is one of the most economically significant insect pests for potato in both field and storage worldwide.To evaluate the infestation,reduction of potato yield and the control efficacy for PTM,field tests were conducted in two seasons by intercropping of potato as the host plant with maize as a non-host plant of PTM.Three intercropping patterns were tested,which were 2 rows of potatoes with either 2,3,or 4 rows of maize(abbreviated 2 P:2 M,2 P:3 M,and 2 P:4 M),and the monocropped potato as the control,2 rows of potatoes,without maize,(abbreviated 2 P:0 M).Results showed that the population and infestation of PTM in the 2 P:3 M intercropping pattern was significantly lower than those in 2 P:2 M,2 P:4 M and the monocropping pattern of 2 P:0 M,due to the enhancement of natural enemies.Cumulative mines and tunneling in potato leaves in 2 P:3 M intercropping were significantly lower than those in 2 P:2 M and 2 P:4 M patterns.The population of parasitoids and the parasitism rate of PTM in intercropping pattern of 2 P:3 M were significantly higher than that in intercropping pattern of 2 P:2 M,2 P:4 M and monocropping pattern of 2 P:0 M.We conclude that the potato intercropped with maize reduced the adult and larva populations,and reduced the damage from PTM by enhancing the number of parasitoids and the level of parasitism.The greatest population density of parasitoids and parasitism rate were in the intercropping pattern of 2 rows of potatoes with 3 rows of maize.These data indicate that the host/non-host intercropping patterns can be used as a biological control tactic against PTM by enhancing the density of natural enemies in the agro-ecosystems.The potato tuber moth(PTM), Phthorimaea operculella(Zeller), is one of the most economically significant insect pests for potato in both field and storage worldwide. To evaluate the infestation, reduction of potato yield and the control efficacy for PTM, field tests were conducted in two seasons by intercropping of potato as the host plant with maize as a non-host plant of PTM. Three intercropping patterns were tested, which were 2 rows of potatoes with either 2, 3, or 4 rows of maize(abbreviated 2 P:2 M, 2 P:3 M, and 2 P:4 M), and the monocropped potato as the control, 2 rows of potatoes, without maize,(abbreviated 2 P:0 M). Results showed that the population and infestation of PTM in the 2 P:3 M intercropping pattern was significantly lower than those in 2 P:2 M, 2 P:4 M and the monocropping pattern of 2 P:0 M, due to the enhancement of natural enemies. Cumulative mines and tunneling in potato leaves in 2 P:3 M intercropping were significantly lower than those in 2 P:2 M and 2 P:4 M patterns. The population of parasitoids and the parasitism rate of PTM in intercropping pattern of 2 P:3 M were significantly higher than that in intercropping pattern of 2 P:2 M, 2 P:4 M and monocropping pattern of 2 P:0 M. We conclude that the potato intercropped with maize reduced the adult and larva populations, and reduced the damage from PTM by enhancing the number of parasitoids and the level of parasitism. The greatest population density of parasitoids and parasitism rate were in the intercropping pattern of 2 rows of potatoes with 3 rows of maize. These data indicate that the host/non-host intercropping patterns can be used as a biological control tactic against PTM by enhancing the density of natural enemies in the agro-ecosystems.

关 键 词：potato tuber moth Phthorimaea operculella(Zeller) INTERCROP biological control natural enemies PARASITOIDS 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治] S513[农业科学—植物保护] S476