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The Niche Analysis of Wheat Ear Aphids and Their Natural Enemies

Lin Huafeng;Zou Shuzong;Wang Xianjie Anhui Agricultural University, Hefei  
The values of niche breadth and niche overlap of three aphid species and their main naturalenemies during wheat ear growth in Hefei region were studied, and the interspecies relation wasanalysed in light of resourses. The three aphid species, aphid parasites and ladybugs distributedover the parts of wheat plant above 40cm from the ground, and the values of vertical nicheoverlap between each 2 species were more than 0.6, and all values of horizontal niche overlapwere less than 0. 63. The niches varied slightly with time. The predominant group of the naturalenemies to wheat aphids was aphid parasites.
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