Bhatta D, Henderson G
Department of Entomology, Louisiana State University Agriculture Center, 404 Life Sciences Bldg., Baton Rouge, LA 70803 (
J Econ Entomol. 2016 Aug;109(4):1813-8. doi: 10.1093/jee/tow094. Epub 2016 May 20.
Slow-acting and nonrepellent termiticides are possible candidates for nestmate to nestmate transfer called horizontal transfer. For the horizontal transfer study of spinosad, Coptotermes formosanus Shiraki was released in sand and soil at 1, 25, and 50 ppm Entrust(®) for 1 h and then mixed with healthy untreated termites for 21 d at the ratio of 1:1. Donor and recipient termites began to contact and groom each other immediately after release. Mortality of termites was recorded at 1, 3, 7, and 14 d after treatment. Spinosad was more effectively transferred in sand than in soil. In sand at 25 and 50 ppm, significantly high mortality of donors and recipients was observed after 7 d. When termites were exposed to treated soil at day 21, all three concentrations resulted in significantly higher mortality compared to the control. In our laboratory study, spinosad was effectively transferred by donor termites. Transfer of spinosad depended on its bioavailability and concentration. Further study is needed to address its effects against C. formosanus under field conditions.
慢效且无驱避性的杀白蚁剂可能是巢伴间转移（即水平转移）的候选药剂。为了研究多杀菌素的水平转移，将台湾乳白蚁置于浓度为1、25和50 ppm的多杀菌素（商品名：Entrust®）处理过的沙子和土壤中1小时，然后按1:1的比例与未处理的健康白蚁混合21天。供体和受体白蚁在释放后立即开始相互接触和梳理。在处理后的第1、3、7和14天记录白蚁的死亡率。多杀菌素在沙子中的转移比在土壤中更有效。在25和50 ppm的沙子中，7天后观察到供体和受体的死亡率显著升高。在第21天让白蚁接触处理过的土壤时，与对照相比，所有三种浓度都导致死亡率显著更高。在我们的实验室研究中，多杀菌素能被供体白蚁有效转移。多杀菌素的转移取决于其生物利用度和浓度。需要进一步研究其在田间条件下对台湾乳白蚁的影响。
