United States Department of Agriculture, Agricultural Research Service, Center for Grain and Animal Health Research, 1515 College Avenue, Manhattan, KS 66502, USA.
J Econ Entomol. 2010 Jun;103(3):991-1001. doi: 10.1603/ec09347.
Data from long-term Tribolium castaneum (Herbst) pheromone trapping programs in two flour mills was used to evaluate the impact of structural fumigations (n = 23) on pest populations. The two mills differed in mean number of beetles captured and proportion of traps with captures of one or more beetles, but in one of the mills the mean number of beetles captured was reduced after implementing a more intensive integrated pest management program. Mean number of beetles per trap and proportion of traps with captures increased by 52.7 +/- 8.2 and 24.8 +/- 4.7% from one monitoring period to the next but decreased by 84.6 +/- 4.6 and 71.0 +/- 5.1% when fumigation occurred between periods, respectively. Mean number of beetles per trap and proportion of traps with captures immediately after fumigation were both positively correlated with number captured per trap and proportion of traps with captures in the monitoring period immediately before fumigation. Mean daily air temperature inside the mill fluctuated with the season, and although always warmer than the outside temperature, the relative difference varied with season. Relationship between inside and outside temperature could be explained well by an exponential equation with the parameters a = 20.43, b = 2.25, and c = -15.24 (r2 = 0.6983, which is 94% of the maximum r2 obtainable). Although outside temperature differed between spring and fall fumigations, inside temperature and reduction in beetle captures was not affected by season. A better understanding of pest populations and the impact of structural treatments within commercial food facilities is critical for improving the management of pest populations and for the adoption of methyl bromide alternatives.
利用在两个面粉厂进行的长期拟谷盗（Herbst）信息素诱捕计划的数据，评估结构熏蒸（n = 23）对害虫种群的影响。这两个工厂在捕获的甲虫数量和有捕获的诱捕器比例上存在差异，但在其中一个工厂，实施了更密集的综合虫害管理计划后，捕获的甲虫数量平均减少。每个诱捕器捕获的甲虫数量和有捕获的诱捕器比例，从一个监测期到下一个监测期分别增加了 52.7 +/- 8.2%和 24.8 +/- 4.7%，但在两次监测期之间进行熏蒸时，分别减少了 84.6 +/- 4.6%和 71.0 +/- 5.1%。熏蒸后立即每个诱捕器捕获的甲虫数量和有捕获的诱捕器比例都与诱捕器中捕获的甲虫数量和前一个监测期有捕获的诱捕器比例呈正相关。工厂内的平均日空气温度随季节波动，尽管始终比外部温度高，但相对差异随季节而变化。内部和外部温度之间的关系可以用一个指数方程很好地解释，该方程的参数为 a = 20.43、b = 2.25 和 c = -15.24（r2 = 0.6983，这是可获得的最大 r2 的 94%）。尽管春季和秋季的熏蒸的外部温度不同，但内部温度和甲虫捕获量的减少不受季节影响。更好地了解害虫种群以及商业食品设施内结构处理的影响，对于改善害虫种群的管理和采用甲基溴替代品至关重要。
