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【目的】为了指导田间正确使用防虫网控制韭菜迟眼蕈蚊Bradysia odoriphaga,本文明确了防虫网对成虫的隔离作用和对韭菜生长的影响。【方法】实验室内测定了韭菜迟眼蕈蚊成虫在不同目数防虫网制成的笼内48 h的逃出率,并通过连续3年的田间小区试验明确防虫网对韭菜迟眼蕈蚊的控制效果。同时,通过田间单墩韭菜笼罩和小区试验验证不同目数防虫网对韭菜生长的影响。【结果】随着防虫网目数的增大,韭菜迟眼蕈蚊雌雄成虫逃出率的逐渐降低,20目网袋内雌雄成虫的逃出率接近100%,40~80目网袋内的逃出率在5%~60%之间,100目和120目网袋内逃出率接近0。田间试验证明80目对韭菜迟眼蕈蚊的阻隔效果最好(P<0.05),60目阻隔效果效果优于40目,但差异不显著(P>0.05)。田间单墩韭菜笼罩试验发现防虫网目数大于70目不利于韭菜生长,40目、50目、60目防虫网在干燥季节促进韭菜生长,小区试验进一步验证了80目对韭菜生长不利,40目和60目对韭菜生长无影响或促进韭菜生长。【结论】40~60目对韭菜迟眼蕈蚊的控制效果较好。
【Objective】 In order to direct the correct use of insect net in the field to control Bradysia odoriphaga, this paper clarified the isolation effect of insect-proof net on adults and the effect on leek growth. 【Method】 In the laboratory, the 48 h escape rate of adult M. leungii adults in cages with different orders of insect nets was determined and the effects of insecticidal nets The control effect. At the same time, the effect of different mesh insect net on the growth of leeks was verified by field single-column leek shrouding and community experiment. 【Result】 With the increase of insect net number, the escaped rate of male and female adults of M. leungi reduced gradually. The escape rates of male and female adults in 20 mesh nets were close to 100% Escape rate of 5% to 60%, 100 mesh and 120 mesh net bag escape rate close to 0. Field experiments showed that 80 mesh had the best barrier against Lentinus edodes (P <0.05), and 60 mesh had better barrier effect than 40 mesh, but the difference was not significant (P> 0.05). Field single pier leek enveloped test found that the number of insect nets is greater than 70 mesh is not conducive to the growth of leeks, 40 heads, 50 heads, 60 mesh insect net in the dry season to promote leek growth, cell test further verified that 80 heads of leek growth adversely, 40 mesh And 60 heads of leeks growth has no effect or promote leek growth. 【Conclusion】 The control effect of 40 ~ 60 mesh on B. axyridis was good.