Jorgensen Amanda, Otani Jennifer, Evenden Maya L
Pest management, Agriculture and Agri-Food Canada, Beaverlodge, Alberta, Canada.
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.
Environ Entomol. 2020 Jun 13;49(3):627-637. doi: 10.1093/ee/nvaa017.
Wheat midge, Sitodiplosis mosellana Géhin, is an invasive pest of wheat, Triticum aestivum L. (Poaceae) throughout Canada and the United States. The applicability of available monitoring tools, including sex-pheromone baited traps, yellow sticky cards, and soil core sample surveys, in the northern-most agroecosystem of its invasive range has not been assessed. In this study, the attraction of male wheat midge to two Delta traps (green and orange) baited with one of three pheromone lures (a flex lure and two red septa lures from different sources) were compared. The efficacy of three yellow sticky cards (7 × 12 cm, 14 × 18 cm, and 14 × 18 cm rolled into a cylinder) for capture of male and female midge was assessed. Larvae were extracted from wheat heads sampled at the same sites to determine relationships with earlier adult trap capture. More male adult midges were captured in pheromone-baited traps with a greater surface area and in traps baited with the Scotts flex lure than the Great Lakes IPM septa lure, which had higher and more variable pheromone release rates. The smaller yellow sticky cards captured more male and female midges than the larger yellow sticky cards, regardless of shape. The number of female midges captured on yellow sticky cards predicted the number of larvae in wheat heads. The number of male midges captured in pheromone-baited traps did not predict larval density. Relationships were found between the number of overwintering cocoons recovered in soil core samples and emerging midges the following spring.
麦红吸浆虫（Sitodiplosis mosellana Géhin）是一种入侵性害虫，在加拿大和美国全境危害小麦（Triticum aestivum L.，禾本科）。包括性诱捕器、黄色粘虫板和土壤芯样调查在内的现有监测工具，在其入侵范围最北部的农业生态系统中的适用性尚未得到评估。在本研究中，比较了雄性麦红吸浆虫对两种诱捕器（绿色和橙色）的吸引力，这两种诱捕器分别用三种性信息素诱饵之一（一种柔性诱饵和两种来自不同来源的红色隔片诱饵）进行诱捕。评估了三种黄色粘虫板（7×12厘米、14×18厘米以及卷成圆筒状的14×18厘米）对捕获雄性和雌性麦红吸浆虫的效果。从相同地点采集的麦穗中提取幼虫，以确定其与早期成虫诱捕量之间的关系。在表面积较大的性信息素诱捕器以及用斯科茨柔性诱饵诱捕的诱捕器中捕获的雄性成虫比用大湖综合植保隔片诱饵诱捕的诱捕器更多，后者具有更高且更不稳定性信息素释放率。无论形状如何，较小的黄色粘虫板捕获的雄性和雌性麦红吸浆虫都比更大的黄色粘虫板多。在黄色粘虫板上捕获的雌性麦红吸浆虫数量可预测麦穗中的幼虫数量。在性信息素诱捕器中捕获的雄性麦红吸浆虫数量无法预测幼虫密度。在土壤芯样中回收的越冬茧数量与次年春天羽化的麦红吸浆虫数量之间发现了相关性。
