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通过研究光活化杀虫活性成分α-三联噻吩(α-T)对红火蚁Solenopsis invicta Buren工蚁觅食行为和触角识别功能的影响,探讨了光活化成分用于控制红火蚁的可行性。用Potter喷雾法将100μg/mL的α-T丙酮水溶液喷施于红火蚁中型工蚁体表,再经紫外(UVA)光照射30 min,在处理后5、10、15、20和30 min时,试蚁对火腿肠的识别率分别为20.00%、25.00%、38.33%、40.00%和41.67%,对杀虫剂饵料的识别率分别为3.33%、0、0、3.33%和0,聚集率分别为17.50%、38.33%、32.50%、45.00%和48.33%;经100μg/mL的α-T涂抹试蚁触角再经紫外光照处理30 min后,触角对丙酮反应的电位值为-0.177 mV,可正常行走的工蚁比率为75.00%;以100μg/mL的α-T涂抹试蚁触角并经紫外光照射30 min后10 h,红火蚁的死亡率为27.50%;上述结果均与α-T黑暗处理、对照(CK)光照处理和CK黑暗处理结果差异显著。α-T对红火蚁工蚁食物识别和探路行走能力均具有良好的光活化抑制作用,以其防治红火蚁具有良好可行性。
The effects of photoactivation active ingredientα-tris-thiophene (α-T) on the foraging behavior and antennae recognition of Solenopsis invicta Buren workers were studied. The feasibility of using light-activated components to control RIFA was also discussed. Potter spray method was used to spray α-T acetone solution (100 μg / mL) onto the body surface of mid-termite ants, then irradiated with ultraviolet (UVA) light for 30 min. At 5, 10, 15, 20 and 30 min, The recognition rates of test insects to sausage were 20.00%, 25.00%, 38.33%, 40.00% and 41.67%, respectively. The identification rates of insecticide bait were 3.33%, 0,0,3.33% and 0, respectively The potentials of response to acetone were -0.177 mV after treated with 100 μg / mL α-T coated test antennae for 30 min by ultraviolet light for 30 min The rate of worker ants walking normally was 75.00%. The mortality of S. invicta was 100% when the antennae of test insects were applied with α-T at 100μg / mL and irradiated with UV light for 30 min. These results were all consistent with α-T darkness , CK (CK) light treatment and CK dark treatment results were significantly different. α-T has good activity of light-activated inhibition on food identification and path-finding ability of the red imported fire ant worker ants, with its feasibility of controlling red imported fire ant.