Abstract:

Based on the amount of aphids which one hundred plants, the damage area of wheat and the related meteorological conditions in Dongping county of Shandong province from 1976 to 2004, two factors affecting the occurrence and development of Wheat aphids were precipitation and sunshine hours. The results showed the amount of aphids which one hundred plants was negative correlation with the average relative humidity of beginning and middle of April, correlation with middle and late of May. The damage area of wheat was correlation with sunshine hours of beginning of April.