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Chinese Journal of Applied Ecology ›› 1993, Vol. 4 ›› Issue (1): 12-17.

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Forecast of larch leaf cast and its control threshold

Wang Yongmin1, Yin Tailong1, Liu Guorong1, Wang Shijun1, Fu Ronghua1, Tong Ying2, Chang Naiqing2, Zhang Qiyun2   

  1. 1. Jilin Institute of Forest Science, Changchun 130012;
    2. Forest Science Institute of Jilin City, Jilin 132011
  • Received:1991-07-03 Revised:1992-01-16 Online:1993-01-25 Published:1993-01-25

Abstract: The forecasting technique of larch leaf cast was investigated in1986—1989, and the supporting system for this forecast and its management is established, which can forecast the current values of forecasting factors, make long-and-medium term forecasting for mean disease index and epidemi area, determine control threshold, work out control plan and predict control benefit.

Key words: Larch, Leaf east, Forecasting factor, Control technique