The spider community and its diversity in the cotton fields in Wuhan have been studied. The results showed that there were 30 species of spiders in contton fields in Wuhan. The dominant species of spiders were Erigonidium graininicola,Misumenops tricuspidatus, Coleo-sama octwnaculatum and Clubiuona japtmicola. The diversities in the limited insecticide area (LIA)were larger than those in the chemical control area(CCA),and in the early developmental period of cotton larger than in the late developmental peri...