水稻田条带间作大豆、玉米对稻飞虱和缨小蜂种群数量的影响

选择在闽北地区广泛种植的经济作物玉米和大豆与水稻条带间作,利用吸虫器进行取样调查,探讨多样化种植对稻飞虱及其卵期寄生蜂缨小蜂种群动态和雌性比例的影响.结果表明:条带间作大豆或玉米既不能显著减少稻飞虱的个体数量,也不能显著增加缨小蜂的种群数量;间作系统中白背飞虱、褐飞虱、灰飞虱及缨小蜂的雌性比例与水稻单作无显著性差异.因此,本研究所采用的多样化种植模式不能有效抑制稻飞虱的种群数量.

Effects of rice intercropped with soybean and maize on the population abundance of rice planthoppers and their egg parasitoids, Anagrus spp.

Rice was intercropped with maize and soybean,which are two crops widely cultivated in the northern area of Fujian Province,China.The population dynamics and female ratios of RPHs and their egg parasitoids,Anagrus spp.were examined and evaluated.The results showed that rice intercropped with soybean and maize did not reduce the abundance of RPHs or increase the abundance of Anagrus spp.significantly;there were no significant differences of female ratios of Sogatella furcifera,Nilaparvata lugens,Laodelphax striatellus and Anagrus spp.between intercropping system and rice monoculture.Therefore the polycultural manipulation strategy did not effectively suppress the development of rice planthopper populations.