Dillehay B L, Calvin D D, Roth G W, Hyde J A, Kuldau G A, Kratochvil R J, Russo J M, Voight D G
Department of Crop and Soil Sciences, The Pennsylvania State University, University Park, PA 16802, USA.
J Econ Entomol. 2005 Feb;98(1):103-12. doi: 10.1093/jee/98.1.103.
Field studies in Pennsylvania and Maryland were conducted during 2000, 2001, and 2002 to test the applicability of published yield loss relationships developed in central Pennsylvania for European corn borer, Ostrinia nubilalis (Hübner), management in warmer, longer season corn, Zea mays L., grain production regions of the northeastern United States. Both isoline hybrids and non-Bt lead hybrids were compared against Bacillus thuringiensis (Bt) hybrids to measure effects of the pest on yield. The European corn borer economic analysis model was used to make site-specific predictions of loss per European corn borer larva for comparison with measured yield loss per larva. Although the model did not predict loss per larva at a field level, it did predict loss at a regional level. The model predicted an overall percentage of yield loss per larva of 2.69+/-0.12% over the region, which was similar to the measured yield loss per larva of 2.66+/-0.59% for isoline hybrids and 3.08+/-0.51% for lead hybrids. The model, on average, provided a good prediction of percentage of yield loss per larva within the climatic zones of 1100-1700 degree-days (DD) (base threshold 12.5 degrees C). Our results suggest that the yield loss relationship developed in Central Pennsylvania, when matched to the timing of third instar second generation European corn borer stalk tunneling is adequate for major corn grain production zones of the northeast United States.
2000年、2001年和2002年期间，在宾夕法尼亚州和马里兰州开展了田间研究，以测试宾夕法尼亚州中部制定的已发表的产量损失关系对于美国东北部温暖、生长季节更长的玉米（Zea mays L.）谷物产区欧洲玉米螟（Ostrinia nubilalis (Hübner)）防治的适用性。将等基因杂种和非Bt对照杂种与苏云金芽孢杆菌（Bt）杂种进行比较，以衡量害虫对产量的影响。欧洲玉米螟经济分析模型用于对每头欧洲玉米螟幼虫造成的损失进行特定地点预测，以便与每头幼虫的实测产量损失进行比较。尽管该模型没有预测田间层面每头幼虫的损失，但它确实预测了区域层面的损失。该模型预测该区域每头幼虫的总体产量损失百分比为2.69±0.12%，这与等基因杂种每头幼虫2.66±0.59%的实测产量损失以及对照杂种3.08±0.51%的实测产量损失相似。平均而言，该模型对1100 - 1700度日（DD）（基础阈值12.5摄氏度）气候区内每头幼虫的产量损失百分比提供了良好的预测。我们的结果表明，宾夕法尼亚州中部制定的产量损失关系，当与第二代欧洲玉米螟三龄幼虫蛀茎时间相匹配时适合美国东北部主要玉米产区。
