Soybean Response to Simulated Green Cloverworm (Lepidoptera: Noctuidae) Defoliation: Progress Toward Determining Comprehensive Economic Injury Levels
Soybean Response to Simulated Green Cloverworm (Lepidoptera: Noctuidae) Defoliation: Progress Toward Determining Comprehensive Economic Injury Levels
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大豆对模拟绿三叶草（鳞翅目：夜蛾科）落叶的反应：确定综合经济损害水平的进展
DOI：
10.1093/jee/78.2.437
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
L. Pedigo
中科院分区：
文献类型：
--
作者：
K. Ostlie;L. Pedigo
大豆对模拟赤霉病的营养反应和产量反应1980-1982年在爱荷华州对落叶病进行了调查。在盛花期施加从0到180个幼虫当量的落叶水平，以模拟第一代赤霉菌的落叶。去叶导致叶面积、高度和倒伏敏感度呈线性下降。下部留叶的补偿是暂时的和有限的。尽管有30%的落叶，营养物候和生殖物候并没有受到影响。模拟赤霉病的落叶造成了显著的产量损失，主要是通过减少角果数量，其次是通过减少种子重量。第一代幼虫的经济危害水平为每米大豆23头幼虫当量。此外，还得出了反映降雨变化的综合经济损失水平。
Soybean vegetative and yield responses to simulated Plathypena scabra (F.) defoliation were investigated in Iowa from 1980 to 1982. Defoliation levels, ranging from 0 to 180 larval equivalents per m of row, were imposed during full bloom to simulate defoliation by first-generation P. scabra . Defoliation produced linear reductions in leaf area, height, and lodging susceptibility. Compensation through lower leaf retention was transitory and limited. Despite >30% defoliation, vegetative and reproductive phenology was not disrupted. Simulated P. scabra defoliation produced significant yield losses, primarily through reduced pod numbers and secondarily through decreased seed weight. The economic injury level for first-generation larvae was established at 23 larval equivalents per m of soybean row. In addition, comprehensive economic injury levels, which reflect rainfall variation, were derived.