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Chinese Journal of Biological Control ›› 2021, Vol. 37 ›› Issue (5): 904-913.DOI: 10.16409/j.cnki.2095-039x.2021.09.012

• ECOLOGICAL REGULATION OF PESTS • Previous Articles     Next Articles

Effects of Wheat-pea Intercropping with Volatile Release Combined with Different Device Application on Wheat Pests and Natural Enemies in Wheat Field

TAN Xiaoling1, YAN Jia1, MIAO Jin2, SUN Jingxuan1, CHEN Julian1   

  1. 1. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Key Laboratory of Crop Pest Control of Henan Province/Key Laboratory of Crop Integrated Pest Management of the Southern of North China/Ministry of Agriculture, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
  • Received:2021-08-28 Online:2021-10-08 Published:2021-10-28

Abstract: The push-pull technology of pest control through intercropping with volatile release can increase the biodiversity in the field and the control efficiency of natural enemies, and reduce the use of pesticides. However, there are few studies on the effects of different spray equipments on pests and natural enemies under different control measures. In this study, insecticides were applied by self-propelled sprayer and manual knapsack sprayer for insect pest control in the four treatments, mono-cropping field, wheat-pea intercropping field, wheat-pea intercropping with aphid alarm pheromone (E-β-farnesene (EBF)) release field, and wheat-pea with MeSA release field. The results showed that the spraying speed of the self-propelled sprayer was much faster than that of the manual knapsack sprayer. The number of wheat grains per spike and yield per hectare were significantly affected by spraying device. The thousand grain weight and yield per ha of the intercropping with methyl salicylate (MeSA) release treatment with self-propelled sprayer were significantly higher than those in all the other treatments. Sprayer had little effect on the average numbers of Sitobion miscanthi and ladybird in the mono-cropping field. However, the numbers of Rhopalosiphum padi, mites and mummies in the self-propelled sprayer treatments were lower than those in the manual knapsack sprayer treatments. The average numbers of S. miscanthi, R. padi and mites in intercropping with volatile release treatment were significantly lower than those in the other treatments when the self-propelled sprayer was applied except that the number of ladybird was to the contrary. Intercropping with MeSA significantly increased the number of mummies in wheat compared with mono-cropping, regardless of spraying method. The density of mites was lower in mono-culture and intercropping with MeSA treatments before spraying. The density of mites remained low in the intercropping with MeSA treatment after spraying. The number of mites in intercropping with MeSA or EBF release treatments dropped to a trough in the second survey after spraying. In contrast, in the monoculture treatment, the number of mites picked up significantly. In conclusion, wheat-pea intercropping with MeSA release treatment significantly increases wheat yield and provides the best control of wheat aphids and mites and the best protection of natural enemies. Self-propelled sprayer has obvious advantages over knapsack sprayer in pesticide spraying efficiency, pest control efficacy and increase of wheat yield, but may have a stronger non-target effect on natural enemies than manual knapsack sprayer.

Key words: spray equipment, intercropping, volatilen release, Sitobion miscanthi, Rhopalosiphum padi, mite, natural enemy

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