CSIRO Entomology, GPO Box 1700, Canberra, ACT 2601, Australia.
J Econ Entomol. 2010 Apr;103(2):423-32. doi: 10.1603/ec09067.
The efficacy of bistrifluron, a chitin synthesis inhibitor, in cellulose bait pellets was evaluated on the mound-building subterranean termite, Coptotermes acinaciformis (Froggatt). Three concentrations of the bistrifluron were used: 0 (untreated control), 0.5, and 1.0% over an 8 wk period. Both doses of bistrifluron bait eliminated (viz. termites absent from nest or mound) termite colonies: 83% of colonies (10 of 12) were either eliminated or moribund (viz. colony had no reproductive capacity and decreased workforce) after 8 wk, compared with none of the control colonies. The remaining two treated colonies were deemed to be in decline. Early signs that bistrifluron was affecting the colonies included: 3 wk after baiting mound temperatures showed a loss of metabolic heat, 4 wk after baiting foraging activity in feeding stations was reduced or absent, and dissection of two mounds at 4 wk showed they were moribund. Colony elimination was achieved in around half or less the time, and with less bait toxicant, than other bait products tested under similar conditions in the field, because of either the active ingredient, the high surface area of the pellets, or a combination of both. This suggests the sometimes long times reported for control using baits may be reduced significantly. The use of a mound building species demonstrated clearly colony level effects before and after termites stopped foraging in bait stations.
三氟脲，一种几丁质合成抑制剂，在纤维素毒饵中的效果在土白蚁（Coptotermes acinaciformis）上进行了评估。三氟脲使用了三个浓度：0（未处理的对照）、0.5 和 1.0%，为期 8 周。两种剂量的三氟脲毒饵都消灭了白蚁群体：8 周后，10 个群体中有 83%（12 个中的 10 个）被消灭或濒于死亡（即群体没有生殖能力且劳动力减少），而对照群体中没有一个这样。剩下的两个处理群体被认为正在衰退。三氟脲开始影响群体的早期迹象包括：施毒饵后 3 周，蚁丘温度显示出代谢热的丧失；施毒饵后 4 周，取食站的觅食活动减少或消失；4 周后对两个蚁丘进行解剖表明它们已濒于死亡。由于有效成分、颗粒的高表面积或两者的结合，与在类似条件下在野外测试的其他毒饵产品相比，群体的消灭在一半或更少的时间内，用更少的毒饵毒物就可以实现，这表明有时报告的使用毒饵控制所需的时间可能会大大减少。使用筑丘物种在白蚁停止在毒饵站取食之前和之后清楚地显示了群体水平的影响。
