Del Pozo-Valdivia Alejandro I, Seiter Nicholas J, Reisig Dominic D, Greene Jeremy K, Reay-Jones Francis P F, Bacheler Jack S
J Econ Entomol. 2016 Feb 18;109(3):1141-1155. doi: 10.1093/jee/tow020.
Since its unintentional introduction during 2009, Megacopta cribraria (F.) has spread rapidly throughout the southeastern United States, mainly feeding and reproducing on kudzu, Pueraria montana Loureiro (Merr.) variety lobata (Willdenow), and soybeans, Glycine max (L.) Merr. Megacopta cribraria has become a serious economic pest in soybeans, forcing growers to rely solely on insecticide applications to control this insect. The main objective of this study was to investigate if variation in planting date and maturity group of soybeans had an impact on management of M. cribraria populations. Three experimental fields were located in North Carolina (2) and South Carolina (1), and the tests replicated during 2012 and 2013. Treatments consisted of three planting dates, four maturity groups, and insecticide treated versus untreated, at each location. More M. cribraria were found in untreated early planted soybeans than late planted soybeans. Generally, maturity group did not influence population densities of M. cribraria. Yield was significantly influenced by the interaction between planting date and maturity group. There was a negative linear relationship between M. cribraria populations and soybean yield. Although early planted soybeans may avoid drought conditions and potentially large populations of defoliators, these fields may be at greater risk for infestation by M. cribraria.
自2009年意外引入以来，筛豆龟蝽已迅速蔓延至美国东南部，主要以葛藤、野葛（变种）和大豆为食并繁殖。筛豆龟蝽已成为大豆上的一种严重经济害虫，迫使种植者只能依靠施用杀虫剂来控制这种昆虫。本研究的主要目的是调查大豆种植日期和成熟组的变化是否对筛豆龟蝽种群的管理有影响。三个试验田分别位于北卡罗来纳州（2个）和南卡罗来纳州（1个），试验在2012年和2013年重复进行。每个地点的处理包括三个种植日期、四个成熟组，以及杀虫剂处理与未处理。在未处理的早播大豆中发现的筛豆龟蝽比晚播大豆中的更多。一般来说，成熟组对筛豆龟蝽的种群密度没有影响。产量受到种植日期和成熟组之间相互作用的显著影响。筛豆龟蝽种群与大豆产量之间存在负线性关系。虽然早播大豆可能避免干旱条件和潜在的大量食叶害虫，但这些田地可能面临更大的筛豆龟蝽侵扰风险。
