From Nov. 2008 to Jun. 2010

an ecological investigation on Hexapoda was carried out in rice habitat and non-rice habitat in Agricultural Technology Extension Station

Zhuhai

Guangdong Province. A total of 78 species of Hexapoda

which belong to 57 familes

10 orders

were obtained. The results show that Diptera and Homoptera are dominant in rice field

but only Diptera is dominant in weeds during rice growing. Diptera and Hemynoptera are dominant in

Italian ryegrass

field in winter. However

Hemynoptera

Thysanoptera and Diptera are dominant in weeds. Shannon-Wiener diversity index (

H

) is 2.30~3.20. Pielou-evenness (

J

) is 0.72~0.86

but the value would be changed when rice maturing. Simpson dominance index is below 0.25. There is no distinct difference on the three indices between rice growing season and winter time. Jaccard similarity index is higher in

Italian ryegrass

field and control field during rice growing

but higher in

Italian ryegrass

field and weeds in winter.