Exactly predicted serious occurrence and date of 3rd generation cotton bollworm moth and eggs appearence peak , based on occurrence date of 2nd generation bollworm , residual booworm after insecticide application , temperature and rainfall in 1995 . i suggested that a special attention should be paid to control optimum stage , optimum pesticide was selected , sciencial pesticide application method and agronomic measures was applied properly . in result , third generation bollworm was controlled effectively in xiangshu in 1995 根据95年二代棉铃虫的发生实况及防治之后的残留虫量，结合当时的气温和降水趋势，准确推算该年三代棉铃虫的大发生和蛾卵高峰的出现时间，指出需要抓住防治适期，选准对路农药品种和采用科学的施药方法以及农艺措施，很好地控制了三代棉铃虫的危害。
In cradle while cut down divides low - grade forest , notice to do authority of nice area branch and low layer vegetation clear the job , can reduce rat already kind concealment place , destroy mouse kind live condition , reduce rat kind density , can reduce miscellaneous bush to wait again at the same time right young forest competition , those who be helpful for forest is hale grow and shift to an earlier date closing cheng lin , the forest land after yu ren is shut goes against rat kind habitat , can rise to control rat to feel the effect that produces greatly 在抚育伐除劣等林木的同时，注重做好地面枝权及低层植被的清理工作，既可减少鼠类的隐蔽场所，破坏鼠类生存条件、降低鼠类密度，同时又能减少杂灌木等对幼林的竞争，有利于林木的健壮生长和提前郁闭成林，郁人闭后的林地不利于鼠类栖息，可以起到控制鼠害大发生的作用。
By investigation on the relationship between period , quantity , extend of ostrinia furnacalis emergence and meteorological factors in qiqihaer , this paper analyzes the factors which effect on period , quantity , extend of ostrinia furnacalis about annual wave . the beginning time of ostrinia furnacalis pupae emergence depends on average temperature in may and june , weather conditions in july decide whether ostrinia furnacalis pupae finish ahead of time ; the beginning time of eclosion is decided by average lowest temperature and precipitation in may and june , and the end time of eclosion is decided by average lowest temperature in june and july , meantime , the length of time of ostrinia furnacalis eclosion and time of grub emergence influence on the extent of ostrinia furnacalis . an important condition of a great emergence of ostrinia furnacalis is that how temperature matchs humidity , which substantially result in reduction of maize output 本研究项目通过对齐齐哈尔市玉米螟发生期、发生量、发生程度与气象条件关系的分析，找出玉米螟发生期、发生量、发生程度年际波动的影响因子： 5 、 6月的平均气温决定了玉米螟化蛹开始的早晚， 7月的天气条件决定玉米螟化蛹是否提前结束； 5 、 6月的平均最低气温和降水则决定羽化开始的早晚， 6 、 7月的平均最低气温又决定了玉米螟羽化结束的早晚；而玉米螟羽化持续时间的长短和幼虫发生的早晚影响了玉米螟的发生程度；温湿条件配合适当与否是促使玉米螟大发生的重要条件，玉米螟大发生又会引起玉米的大幅度减产。
