不同种植环境稻田稻飞虱种群动态研究

 为了分析不同种植环境条件对稻飞虱种群数量发生的影响，于2011年对云南省安宁市禄脿镇地区单一种植环境稻田和多样性种植环境稻田稻飞虱进行了扫网和灯诱调查。结果表明：不同种植环境稻田中白背飞虱（Sogatella furcifera）数量均明显高于褐飞虱（Nilaparvata lugens）及灰飞虱（Laodelphax striatella） 数量，白背飞虱为当地主要的稻飞虱危害种群；水稻移栽（2011年5月24日）前1周左右白背飞虱开始迁入本地区，6月下旬至7月上中旬达到发生高峰期，7月中旬之后白背飞虱成虫开始外迁；通过LSD法对不同种植环境稻田白背飞虱进行显著性差异检验，发现不同种植环境稻田白背飞虱若虫数量在8次调查中有6次存在显著差异（P<005）；多样性种植环境稻田中白背飞虱成虫的寄生率和雌性性比多高于单一种植环境稻田；多样性种植环境稻田捕食性天敌蜘蛛种类和总个体数均大于单一种植环境稻田。因此，多样性种植环境稻田对稻飞虱数量有更强的控制作用。

Study on Dynamics of Rice Planthopper Population in Different Planting Environment Rice Fields

 In order to analyze the populations of rice planthopper in different planting environment rice fields, we investigated diversity and single planting environment rice fields with sweep net and light trap method in Lubiao Town of Yunnan Province. The result showed that: Sogatella furcifera was the dominant rice planthopper in this local, they entered before rice transplanting. The fastigium was in the last ten days of June to the middle ten days of July, and S. furcifera move away after the middle of July. By the LSD test of S. furcifera nymph population in different planting environment rice fields, we found six times had significant difference (P<005). Parasitism rate and sex ratio of S. furcifera in diversity planting environment rice fields was higher. The kinds and number of spider as natural enemies in diversity planting environment rice fields was also higher. Therefore, the diversity planting rice fields could have the better effects in rice planthopper control.