小菜蛾发生规律与气象要素的研究李惠明（上海市蔬菜科学技术推广站）小菜蛾是上海市蔬菜生产的重要害虫，要控制为害，必须改变被动局面，研究影响小菜蛾年发生消长的气象要素，进行中长期预报，这是治理小菜蛾的重要措施。１雨量参数旬均雨量越少，越有利小菜蛾的发生；... Study on Occurrence and Weather Factors of Diamondback Moth LI Hui-ming (Shanghai Vegetable Science and Technology Promotion Station) Plutella xylostella is an important pest of vegetable production in Shanghai. To control the damage, we must change the passive situation to study the meteorological factors that affect the growth and decline of Plutella xylostella , For long-term forecast, which is an important measure to control the diamondback moth. 1 rainfall parameters ten days less rainfall, the more favorable to the occurrence of diamondback moth; ...