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Chinese Journal of Applied Ecology ›› 1995, Vol. 6 ›› Issue (1): 67-70.

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Preliminary study on the relationship among Macrocentrus linears,Ostrinia furnacalis and spring corn

Lu Zhongxian1, Yang Zhangfa1, Hu Cui2   

  1. 1. Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;
    2. Zhejiang Agricultural University, Hangzhou 310029
  • Received:1992-10-12 Revised:1993-03-22 Online:1995-01-25 Published:1995-01-25

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Abstract: The study shows that the peak of M.linears occurrence is about 6-9 days later than thatof O.furnacalis adults, and conformed with the tasseling of spring corn.When the corn istasseling, most of O.furnacalis larvae are in 3rd and 4th instar, which are easy to be parasitized by M.linears.Owing to the changes of morphological structure and nutritivecomposition of tassels after flowering, O.furnacalis larvae are forced to move downwardto find more favorable foods.M.linears are attracted by O.furnacalis larvae and its parasitism is closely related to the development of O.furnacalis larvae and the growth periodof corn.

Key words: Ostrinia furnacalis, Corn, Macrocentrus linears, long-term fertilization, soil phosphorus surplus, loessial soil, the Loess Plateau, available phosphorus, available phosphorus agronomy threshold