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首页> 外文期刊>Journal of Economic Entomology >Assessment of a Density-Based Action Threshold for Suppression of Sugarcane Aphids, (Hemiptera: Aphididae), in the Southern High Plains
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Assessment of a Density-Based Action Threshold for Suppression of Sugarcane Aphids, (Hemiptera: Aphididae), in the Southern High Plains

机译：评估基于密度的作用阈值，抑制甘蔗蚜虫（Hemiptera：蚜虫），南高平原

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摘要

In the High Plains, sugarcane aphid, Melanaphis sacchari Zehntner (Hemiptera: Aphididae), colonize grain sorghum, Sorghum bicolor (L)Moench (Cyperales: Poaceae), when it is in reproductive stages and aphid populations increase rapidly. Sugarcane aphid management recommendations based on aphid densities have been implemented in southern United States, but have not been assessed in the High Plains. Therefore, the goal of this work was to validate whether these guidelines can provide effective suppression of the aphids and improve yield. In a 2-y field experiment, sorghum susceptible (DKS44-20) and resistant (DKS37-07) to sugarcane aphids, with and without insecticide (clothianidin) seed treatments, was exposed to natural aphid infestations and treated with a foliar insecticide (flupyradifurone) once sugarcane aphid densities exceeded 50 per leaf. Further, to assess the effects of these tactics on sorghum yield, data were collected from plots that were not treated at the threshold. In both years, foliar insecticide applied at the density-based threshold decreased aphid numbers across sorghum hybrids with and without seed treatments and aphid densities remained below threshold for the remainder of the season.Yield of sorghum depended on sugarcane aphid pressure-when their densities were high (2016), the resistant hybrid with and without the foliar spray outperformed the unsprayed susceptible hybrid, while the susceptible hybrid had higher yields than resistant hybrid when sugarcane aphid pressure was low (2017). Outcomes of this work support the notion that a well-timed foliar application can alleviated losses in yield in sorghum in theTexas Panhandle and potentially other regions of the High Plains.
机译：在高平原，甘蔗蚜虫，Melanaphis Sacchari Zehntner（Hemiptera：Aphididae），殖民化谷物高粱，高粱双子（L）Moench（多巴哥语：Poaceae），当它处于生殖阶段和蚜虫种群迅速增加时。基于蚜虫密度的甘蔗蚜虫管理建议已在美国南部实施，但尚未在高原中进行评估。因此，这项工作的目标是验证这些指导方针是否可以提供有效的抑制蚜虫并提高产量。在2-y场实验中，高粱易感（DKS44-20）和耐糖蚜虫的耐抗性（DKS37-07），用杀虫剂（胡桃蛋白）种子治疗，暴露于天然蚜虫侵扰并用叶面杀虫剂（FlupyRadifurone）治疗）一旦甘蔗蚜虫密度超过每叶50。此外，为了评估这些策略对高粱产量的影响，从未在阈值处理的图中收集数据。在两年内，在基于密度的阈值下施加的叶面杀虫剂在高粱杂交体上减少了高粱杂交种，而没有种子处理，并且蚜虫密度仍然低于季节的阈值。高粱的尤利依赖于甘蔗蚜虫压力 - 当他们的密度时高（2016），具有和无叶面喷雾的抗性杂交优于未喷雾的易感杂交，而当甘蔗蚜虫压力低时，易感杂交比抗性杂种更高（2017）。这项工作的结果支持该研究的观点，即在Thetexas Panhandle中高粱的损失和潜在的高平原区域的损失可以减轻良好的叶酸缺陷。

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