Effect of a Parasitoid and Rice Cultivars on the Brown Planthopper

Abstract

Rice cultivars with different genes for resistance and egg parasitoid, Anagrus incarnatus, were evaluated their combined effects on the brown planthopper (BPH), Nilaparvata lugens. In the absence of the parasitoid, N. lugens survival was expectedly the highest on the susceptible, intermediate on the moderately resistant, and lowest on the resistant cultivars. 室內進行測定具不同抗性基因之水稻品種與一種卵寄生蜂對褐飛蝨之影響，在無天敵存在下，褐飛蝨的存活數在感虫品種最多；中抗品種次之；而在高抗性品種最少。接寄生蜂後，其存活數仍以高抗性品種較低，測定寄生率單獨對褐飛蝨之影響時，發現其在抗虫品種造成褐飛蝨之死亡率較高。