摘要
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.
In 1983—1986,the damage and 'on-tree' action threshold of peachfruit borer Carposina niponensis Walsingham to apple were studied inapple growing area of Xingcheng,Liaoning Province.In natural condi-tion,the percentage of apple fruit with 1,2,and 3—4 eggs per fruitranged from 61.11—65.74%,21.69—21.77%,and 2.04—7.46%,respecti-vely.Based upon egg inoculation treatments on fruit of Rails and GoldenDelicious varieties,it was indicated that there was significant positivecorrelation between egg fruit rate and yield loss rate.The EIL modelsof the two varieties were then developed as follows: X_1=H.J+K+L/Q.B.C.0.008648+0.1926 X_2=H.J+L/Q.B.C.0.008197-0.0111where,X_1,X_2=the EIL of Rails and Golden Delicious respectively;H=cost of insecticide (yuan/kg.);J=dorsage of insecticide for eachgeneration (kg./mu);K=apparatus expenditure (yuan);L=manpowerexpenditure (yuan);Q=yield (kg./mu);B=cost of production(yuan/kg.);and C=efficacy of control(%). The EILs were examined in major apple growing area,the resultsand benefits were well received by apple growers.
出处
《植物保护学报》
CAS
CSCD
北大核心
1990年第4期359-364,共6页
Journal of Plant Protection
关键词
苹果
桃小食心虫
为害
防治指标
Carposina niponensis——damage——control threshold
