降雨强度对棉花上棉花粉蚧掉落的影响  

Falling rates of Phenacoccus solenopsis Tinsley on cotton plant under different rainfall intensity

作　　者：韩玮[1] 刘欢[1] 陆永跃[1] 

机构地区：[1]华南农业大学昆虫学系,广州510642

出　　处：《环境昆虫学报》2016年第4期710-714,共5页Journal of Environmental Entomology

基　　金：国家自然科学基金(31171855);广东省研究生教育创新计划项目(2013JDXM14)

摘　　要：为了解降雨对棉花粉蚧Phenacoccus solenopsis Tinsley的影响,本文应用人工模拟降雨器方法研究了不同降雨强度条件下棉花粉蚧各个虫期的掉落比例。结果表明随着降雨强度的增加,棉花粉蚧掉落率逐渐增大;同一降雨强度下龄期越高、虫体越大掉落率越低。15 mm/h时棉花粉蚧各个虫期掉落率均较低,为0.7%-3.3%;45-75 mm/h时掉落率增大,为7.0%-17.7%;105 mm/h、135 mm/h、165 mm/h、195 mm/h时掉落率变化范围分别是10.0%-23.7%、12.3%-32.3%、13.3%-38.7%、16.0%-45.7%。掉落率(Y)与降雨强度(X)之间关系方程为Y=0.2587X^(0.9850)(1龄若虫)、Y=0.2549X^(0.9845)(2龄若虫)、Y=0.0266X^(1.4014)(3龄若虫)、Y=0.0507X^(1.1307)(雌成虫)。In order to understand the impact of the rainfall on the cotton mealybug Phenacoccus solenopsis Tinsley,the artificial rainfall simulator method was used in studying the falling rates of the cotton mealybug at different rainfall intensity in this paper. The results indicated that the falling rates went up while rainfall intensity rose. At the same rainfall intensity,the higher the mealybug age,the lower the falling rates.Falling rates were little as 0. 7%-3. 3% when the rainfall intensity with 15 mm / h. The falling rates increased as 7. 0%-17. 7% when the rainfall intensity were 45-75 mm / h. The falling rates varied with10. 0%-23. 7%,12. 3%-32. 3%,13. 3%-38. 7% and 16. 0%-45. 7% as the rainfall intensity were105 mm / h,135 mm / h,165 mm / h and 195 mm / h. The formulations to simulate the relationship between the rainfall intensity and falling rates of P. solenopsis were Y = 0. 2587X0.9850（ 1stnymph）, Y =0. 2549X0.9845（ 2ndnymph）,Y = 0. 0266X1.4014（ 3rdnymph） and Y = 0. 0507X^（1.1307）（ female adult）.

关 键 词：扶桑绵粉蚧 棉花 降雨强度 掉落率 

分 类 号：Q968.1[生物学—昆虫学] S433[农业科学—农业昆虫与害虫防治]