【摘要】 为了明确烟青虫危害对烟草造成的产量损失与经济损失,以及烟青虫的理论防治指标,采用大田笼罩接虫法对2代烟青虫的危害损失及防治指标进行研究。结果表明:烟青虫危害烟草时,单株虫量1、2、3头造成的产量损失率分别为12.55%、19.86%、31.93%,上等烟下降比例分别为16.58%、29.73%、47.19%,经济损失率分别为14.78%、28.31%、42.33%;虫量与烟草产量损失率、上等烟叶下降率和经济损失率均呈极显著正相关;2代烟青虫的理论防治指标为4~6头/100株。更多还原

【Abstract】 In order to specify the production and economic loss rate of tobacco that caused by tobacco budworm,and make the theoretical action threshold clear of tobacco budworm.The authors estimated the loss rate and proposed action threshold of two generation tobacco budworm with the method of inoculation pest test in cage condition.The results showed that the production loss rates were 12.55%,19.86%and 31.93%,the percentage decreasing in rate of superior leaves were 16.58%,29.73%and 47.19%,and the economic loss rate were 14.78%,28.31%and 42.33%due to the damage of 1,2and 3pests in one plant, respectively.The relationship of the amount of worm with the loss rate and the percentage decreasing in rate of superior were of significant positive correlation.The theoretical action threshold was 4~6pests per 100plants in the tobacco field.更多还原