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作者于1983—1986年在辽宁省兴城市苹果产地,对桃小食心虫(Carposina niponensisWalsingham)为害苹果的损失和树上防治指标进行了系统的研究。结果表明,桃小食心虫产于果实上的卵量差异较大。果上有1粒卵的占61.11—65.74％;有2粒卵的占21.69—21.77％;3、4粒卵的较少,仅占2.04—7.46％。国光和金冠苹果无论幼果还是近成熟果,单果接1粒卵,果实被蛀受害率分别为88.9％和90.88％,接卵量增至3粒,果实平均受害率接近或达到100％。田间模拟试验明确卵果率与所致减产率呈正相关。根据这一相关关系,综合有关因素组建了以卵果率(X)为指标的经济受害水平(EIL)模式: 国光X=(H·J+K+L)/(Q·B·C·0.008648)+0.1926 金冠X=(H·J+K+L)/(Q·B·C·0.008197)-0.0111根据模式制订出指导树上施药的防治指标。经检验证实,防治效果良好,经济效益显著.
The author studied systematically apple loss and tree pest control damage caused by Carposina niponensis Walsingham from 1983 to 1986 in Xingcheng apple producing area in Liaoning province. The results showed that peach mungbean produced in the fruit of the eggs are quite different. Fruit had 1 egg accounted for 61.11-65.74%; 2 eggs accounted for 21.69-21.77%; 3,4 eggs less, accounting for only 2.04-7.46%. Guoguang and Golden Delicious apple, regardless of young fruit or nearly mature fruit, single fruit take an egg, fruit borer damage rates were 88.9% and 90.88%, the amount of eggs received to 3, the average fruit damage rate close to or reach 100%. In the field simulation test, it was found that the egg yield was positively correlated with the yield reduction. According to this correlation, the economic damage level (EIL) model with egg percentage (X) as the index was established based on the relevant factors: Guoguang X = (H · J + K + L) / (Q · B · C · 0.008648 ) +0.1926 Golden Delicious X = (H · J + K + L) / (Q · B · C · 0.008197) -0.0111 According to the model to develop a guide tree on the application of control indicators. After the test confirmed that the control effect is good, significant economic benefits.