水稻品种和稻虱缨小蜂对褐飞虱协同作用的模拟分析

利用我们先前的试验结果和文献资料，组建了水稻品种－褐飞虱－稻虱缨小蜂３者相互关系的模拟模型．模拟分析表明水稻品种能直接和间接地通过物理或化学特性影响稻虱缨小蜂的寄生作用，其中以影响褐飞虱卵垂直分布型、稻虱缨小蜂的迁入时间、未成熟期历期和怀印量等的水稻品种特性起主要作用．同时，模拟分析还表明中等抗性的水稻品种，配以增强稻虱缨小蜂寄生作用的品种特性，就能有效地控制褐飞虱的危害．文中还就协调水稻品种抗性与天敌协同控制褐飞虱的途径进行了讨论．

Simulation Analysis on Coordinated Effects of Rice Varieties and Anagrus Nilaparvatae Pang et Wang on Brown Planthopper, Nilaparvata lugens(Stal)

A simulation model on interactions among rice varieties, brown planthopper (BPH) , Nilaparvata lugens(Stal) and Anagrus nulaparvaae Pang et Wang was constructed, using our previous experimental results together with literature data. The simulation results indicated that rice varieties could directly and indirectly influence the parasitism of A. nilaparvatae on BPH through physical and chemical characteristics, and characteristics of rice varieties related to verti- cal distribution of BPH eggs, imigration time, the duration of unmature stage and fecundity of A. nilaparvatae would play important roles. The results also showed that BPH could be controlled effectively by moderately resistant rice varieties with characteristics enhancing effectiveness of A. nilaparvatae. The approaches to coordinate the effects of rice variety resistance and natural enemies for controlling BPH were discussed.