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估测玉米螟危害玉米的产量损失,关系到防治策略及经济核算等多方面问题。根据实际情况,采用比较科学的估测方法,则能够较准确的反映螟害对玉米产量的影响程度。美国Patch 等(1941,1942)提出每株1头欧洲玉米螟幼虫减产3%以后,Jdris 等(1961)提出以茎穴数量作为估量产量损失比根据老熟幼虫数量准确。我国昆虫学家,多数主张以虫量作为估计产量损失的依据(如吴维钧等1963;邱式邦等、忻亦芬等1964;顾成玉等1985、1987、1988)。吴维钧等(1965)曾提出春玉米上螟害产量损失的估计,应主要根据第一代虫口和隧道密度及折茎情况。本文根据作者的研究结果,提出估计玉米螟危害玉米的产量损失,依据玉米被害状比较准确。
Estimation of corn borer damage corn yield losses related to control strategies and economic accounting and other issues. According to the actual situation, the use of a more scientific estimation method can accurately reflect the impact of stem borer on corn yield. Patch et al. (1941, 1942) suggested that after a reduction of 3% in the production of one European corn borer larva per plant, Jdris et al. (1961) suggested that the amount of stalks should be taken as a measure of yield loss as compared to the number of mature larvae. Chinese entomologists, most advocates the amount of insects as a basis for estimating the yield loss (such as Wu Weijun et al 1963; Qiu style, Xin Yi Fen et al 1964; Gu Chengyu 1985,1987,1988). Wu Weijun et al. (1965) put forward the estimation of yield loss on spring corn borer, which should be mainly based on the first generation of insect mouth and tunnel density and the condition of the stems. In this paper, according to the author’s research results, it is proposed to estimate the yield loss of corn borer damage to corn, which is more accurate according to the damage of corn.