2、保bao護hu和he利li用yong天tian敵di。天tian敵di是shi害hai蟲chong的de克ke性xing，對dui害hai蟲chong的de生sheng存cun具ju有you明ming顯xian的de抑yi製zhi作zuo用yong。在zai原yuan始shi森sen林lin中zhong由you於yu天tian敵di抑yi製zhi
，使shi得de蟲chong災zai難nan以yi暴bao發fa。我wo們men應ying從cong以yi下xia四si個ge方fang麵mian保bao護hu和he利li用yong天tian敵di控kong製zhi害hai蟲chong。一yi是shi加jia強qiang鳥niao類lei保bao護hu，禁jin止zhi捕bu殺sha。二er是shi保bao護hu和he利li用yong楊yang樹shu林lin中zhong害hai蟲chong的de天tian敵di如ru寄ji生sheng蜂feng
、寄生蠅、捕食性昆蟲、有益的微生物等。三是創造適宜於天敵生存的環境，如多栽植油菜、豆科牧草等適宜寄生蜂、蠅生存的農作物等。四是開展天敵的規模化生產，為防治中大麵積推廣創造條件。

3
、積(ji)極(ji)采(cai)用(yong)生(sheng)物(wu)防(fang)治(zhi)措(cuo)施(shi)，最(zui)大(da)限(xian)度(du)減(jian)少(shao)對(dui)有(you)益(yi)生(sheng)物(wu)的(de)影(ying)響(xiang)。生(sheng)物(wu)防(fang)治(zhi)措(cuo)施(shi)對(dui)害(hai)蟲(chong)有(you)較(jiao)大(da)影(ying)響(xiang)
，對(dui)天(tian)敵(di)影(ying)響(xiang)微(wei)弱(ruo)，通(tong)過(guo)繁(fan)殖(zhi)微(wei)生(sheng)物(wu)或(huo)寄(ji)生(sheng)性(xing)天(tian)敵(di)，寄(ji)生(sheng)於(yu)害(hai)蟲(chong)的(de)卵(luan)、幼you蟲chong等deng，造zao成cheng害hai蟲chong形xing成cheng流liu行xing病bing以yi撲pu滅mie害hai蟲chong。運yun用yong楊yang尺chi蠖huo核he多duo角jiao體ti病bing毒du防fang治zhi楊yang尺chi蠖huo，就jiu能neng明ming顯xian控kong製zhi住zhu楊yang尺chi蠖huo幼you蟲chong的de暴bao發fa成cheng災zai。今jin年nian我wo市shi楊yang小xiao舟zhou蛾e第di三san代dai幼you蟲chong暴bao發fa成cheng災zai
，而er第di四si代dai楊yang小xiao舟zhou蛾e卵luan由you於yu寄ji生sheng蜂feng的de大da量liang寄ji生sheng而er蟲chong口kou密mi度du顯xian著zhu下xia降jiang。

4、qitayouxiaoyufanghefangzhiyouhaishengwucuoshi。yishijijikaizhandongjifangzhi
，qingchukuzhiluoye，gengfanturang，shugantubaideng。ershirengongzhuoshahaichong，ruzhuoshatianniu，zhaichuchongbao，rengongshezhigelidaifangzhicaolvjie
、楊尺蠖等。三是注幹防治，於幹基部注藥防治

，藥效持續時間長。