进行了烤烟苗床期覆盖防虫网试验示范 ,结果表明 ,母床期覆盖防虫网 ,对斑潜蝇平均防治效果达 96 .0 %。母床期覆盖后子床期继续覆盖 ,相对于子母床均不覆盖防效达 10 0 %。子母床都覆盖防虫网的烟苗 ,生长整齐、健壮 ,根系发达 ,苗龄适中 ,病虫害很轻 ,烟苗素质好。在植保方面 ,采用防虫网覆盖烟苗 ,削弱了化学防治的地位 ,突出了物理防治和农业防治的作用 ,利于环境保护 The experimental results showed that the mulching bed covered the pest control net and the average control effect on the leaf miner reached 96.0%. Sub-bed coverage after the mother bed to continue to cover, relative to the mother bed are not covered by the control effect of up to 10%. The bed is covered with insect net seedling net, neat growth, robust, well-developed, moderate seedling age, pests and diseases are light, good quality tobacco seedlings. In the aspect of plant protection, using insect net to cover tobacco seedlings weakened the status of chemical prevention and control, highlighted the role of physical prevention and control and agricultural prevention, and was conducive to environmental protection