Roscoe Lucas E, MacKinnon Wayne, Régnière Jacques, Forbes Glen, Brophy Matt, Lamb Rosanna
Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre, Fredericton, NB E3B 5P7, Canada.
Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Quebec City, QC G1V 4C7, Canada.
Insects. 2022 Dec 17;13(12):1175. doi: 10.3390/insects13121175.
(SBW) is a major defoliating pest of balsam fir and spruce in eastern North America. As part of an integrated management strategy for SBW, we evaluated the effectiveness of mating disruption as a landscape-level population control tactic. Using a sprayable formulation (CONFOUND) containing a synthetic sex pheromone blend, we treated five 300 ha blocks in Northern New Brunswick with an aerially applied microencapsulated mixture. There were significant reductions in adult trap catches in treated blocks compared to untreated control blocks. Branch sampling in treated blocks showed uniform distribution of CONFOUND deposition throughout the blocks. Population densities following treatment were not significantly affected when compared to densities in control blocks, or prior to treatment. Analysis of egg:adult ratios indicates that no immigration events occurred within treatment or control blocks. The lack of population reduction following treatment strongly suggests that widespread application of CONFOUND at a rate of 50 g of active ingredient per hectare is not an effective tool in controlling SBW populations.
云杉芽卷叶蛾是北美东部香脂冷杉和云杉的主要食叶害虫。作为云杉芽卷叶蛾综合管理策略的一部分，我们评估了交配干扰作为一种景观尺度种群控制策略的有效性。我们使用一种含有合成性信息素混合物的可喷雾制剂（CONFUND），通过空中喷洒微囊化混合物对新不伦瑞克省北部的五个300公顷区域进行了处理。与未处理的对照区域相比，处理区域的成虫诱捕量显著减少。在处理区域进行的枝条采样表明，CONFUND在整个区域内的沉积分布均匀。与对照区域的密度或处理前的密度相比，处理后的种群密度没有受到显著影响。对卵与成虫比例的分析表明，处理区域或对照区域内没有发生迁入事件。处理后种群数量没有减少，这强烈表明以每公顷50克活性成分的速率广泛施用CONFUND并不是控制云杉芽卷叶蛾种群的有效工具。
