【摘要】 对木槿和棉株上棉蚜自然种群消长动态、扩散及迁飞动态研究表明，木槿上棉蚜两种水平空间格局４月２０ 日～５ 月６ 日一直都是聚集格局，东向方位数量偏多，以株为单位第４ 、第１０ 株偏多，５ 月６ 日后扩散引起了格局变化；天敌中大草蛉与棉蚜数量之间相关，棉蚜与各种天敌总量极相关，天敌对棉蚜种群数量影响程度的顺序关联度显示为龟纹瓢虫＞ 食蚜蝇＞ 大草蛉；４ 月１８ 日～５ 月１６ 日木槿上棉蚜种群增长模型为线性模型；气象因子中前一天的大气相对湿度与木槿上棉蚜成若蚜总有翅率相关显著；大田棉蚜成蚜有翅率与提前２天木槿上棉蚜成蚜有翅率之间极相关．更多还原

【Abstract】 The fluctuation dynamics, diffusion and migration of Aphis gossypii population on Hibiscus syriacus and cotton plants were studied. The distribution of Aphis gossypii on Hibiscus syriacus plants from April 20 to May 6 was aggregate with the bigger density in the eastward, and most in No. 4 and No. 10 plants. After May 6, the distribution changed due to diffusion. The number of Chrysopa septem punctata was related to that of Aphis gossypii , while the relationship between the total number of all the natural enemies and the number of Aphis gossypii was extremely significant. The influence order of natural enemies on Aphis gossypii was Propylaca japonica > Tromobididiidae > Chrysopa septem punctata . The growth model for Aphis gossypii population on Hibiscus syriacus from April 18 to May 16 was linear. The relative humidity of the day before was significantly related to the winged adult rate. The rate of winged adult aphids in cotton field was extremely significantly related to that on Hibiscus syriacus two days before.更多还原