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journal1 ›› 2018, Vol. 34 ›› Issue (2): 310-316.DOI: 10.16409/j.cnki.2095-039x.2018.02.020

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Population Dynamics of Cotton Aphid and Its Major Natural Enemies on Different Crops

HU Daowu1,2, ZHANG Shuai1, LUO Junyu1, WANG Chunyi1, LÜ Limin1, ZHANG Lijuan1, CUI Jinjie1   

  1. 1. State Key Laboratory of Cotton Biology/Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China;
    2. Henan Key Laboratory of Plant Stress Biology/College of Life Sciences, Henan University, Kaifeng 475004, China
  • Received:2017-04-12 Online:2018-04-08 Published:2018-04-13

Abstract: With the large-scale uses of chemical pesticides, insecticide resistance of cotton aphid is becoming more and more prominent, necessitating the use of biological control to delay or control resistance development in cotton aphid. In this study, the dynamics of cotton aphids and their main natural enemies were investigated at seedling stage in six crops under conventional conditions. The results showed that the number of cotton aphids on zucchini was the highest (peak 11016.7/100 plants), the second on kidney bean (peak, 6323.3/100 plants), on cotton, cucumber, cowpea and muskmelon, was relatively low. Population dynamics were temporally consistent. The occurrence of the major natural enemies of aphids on the six crops lagged behind the occurrence of cotton aphid. Density of parasitic wasps was the largest among the natural enemies and showed an exponential growth pattern. Population size of cotton aphids and mummified aphids on zucchini was the largest, suggesting that zucchini is a good host plant for rearing the parasitic wasps.

Key words: cotton aphid, seedling stage, population dynamic, major natural enemy

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