微生物農藥是指應用生物活體及其代謝產物製成的防治作物病害、蟲害
、雜(za)草(cao)的(de)製(zhi)劑(ji)。在(zai)當(dang)前(qian)大(da)棚(peng)蔬(shu)菜(cai)無(wu)公(gong)害(hai)栽(zai)培(pei)中(zhong)
，微(wei)生(sheng)物(wu)農(nong)藥(yao)已(yi)經(jing)越(yue)來(lai)越(yue)受(shou)到(dao)重(zhong)視(shi)。為(wei)了(le)提(ti)高(gao)微(wei)生(sheng)物(wu)農(nong)藥(yao)的(de)使(shi)用(yong)效(xiao)果(guo)，菜(cai)農(nong)在(zai)其(qi)使(shi)用(yong)時(shi)要(yao)注(zhu)意(yi)以(yi)下(xia)幾(ji)點(dian)。

首(shou)先(xian)，溫(wen)度(du)要(yao)把(ba)好(hao)關(guan)。微(wei)生(sheng)物(wu)農(nong)藥(yao)在(zai)使(shi)用(yong)時(shi)溫(wen)度(du)不(bu)可(ke)過(guo)低(di)。有(you)些(xie)菜(cai)農(nong)在(zai)使(shi)用(yong)微(wei)生(sheng)物(wu)農(nong)藥(yao)時(shi)
，不(bu)注(zhu)意(yi)環(huan)境(jing)因(yin)素(su)，而(er)是(shi)選(xuan)擇(ze)在(zai)氣(qi)溫(wen)較(jiao)低(di)的(de)天(tian)氣(qi)條(tiao)件(jian)下(xia)使(shi)用(yong)，甚(shen)至(zhi)在(zai)冬(dong)天(tian)和(he)早(zao)春(chun)寒(han)冷(leng)的(de)天(tian)氣(qi)條(tiao)件(jian)下(xia)使(shi)用(yong)，故(gu)沒(mei)有(you)達(da)到(dao)預(yu)期(qi)的(de)防(fang)治(zhi)效(xiao)果(guo)。這(zhe)是(shi)因(yin)為(wei)
，生(sheng)物(wu)農(nong)藥(yao)使(shi)用(yong)時(shi)都(dou)要(yao)求(qiu)較(jiao)高(gao)的(de)溫(wen)度(du)。試(shi)驗(yan)表(biao)明(ming)
，在(zai)25℃-30℃之間，噴施後的微生物活體農藥防治效果要比在10℃-15℃之間的高出1到2倍。

其qi次ci
，棚peng內nei要yao達da到dao一yi定ding的de濕shi度du。如ru白bai僵jiang菌jun，作zuo為wei真zhen菌jun殺sha蟲chong劑ji，製zhi劑ji主zhu要yao含han白bai僵jiang活huo孢bao子zi，幹gan燥zao環huan境jing下xia不bu易yi存cun活huo。而er白bai僵jiang菌jun施shi用yong後hou通tong過guo直zhi接jie接jie觸chu蟲chong體ti，或huo被bei害hai蟲chong吃chi入ru消xiao化hua道dao
，在zai相xiang對dui濕shi度du60%之(zhi)上(shang)孢(bao)子(zi)萌(meng)發(fa)
，在(zai)害(hai)蟲(chong)蟲(chong)體(ti)內(nei)進(jin)行(xing)繁(fan)殖(zhi)
，產(chan)生(sheng)白(bai)僵(jiang)菌(jun)素(su)等(deng)
，導(dao)致(zhi)害(hai)蟲(chong)緩(huan)慢(man)死(si)亡(wang)。死(si)亡(wang)蟲(chong)體(ti)上(shang)的(de)菌(jun)絲(si)和(he)分(fen)生(sheng)孢(bao)子(zi)，通(tong)過(guo)接(jie)觸(chu)或(huo)借(jie)助(zhu)於(yu)氣(qi)流(liu)又(you)傳(chuan)播(bo)至(zhi)其(qi)它(ta)健(jian)康(kang)蟲(chong)體(ti)上(shang)侵(qin)染(ran)，從(cong)而(er)造(zao)成(cheng)流(liu)行(xing)，引(yin)起(qi)大(da)量(liang)個(ge)體(ti)死(si)亡(wang)。

再次
，要避開強陽施用。在高溫、qiangtaiyangguangdezhongwushiyong，yaoxiaobujia。weishengwuhuotinongyao，zuipaqiangtaiyangguangzhaoshe。taiyangguangzhongdeziwaixianduiyabaoyouzhezhimingdeshashangzuoyong
，erqieziwaixiandefusheduibanbaojingtihainengchanshengbianxingjiangxiaozuoyong，yinciyaoxuanzezaixiawu4點鍾以後或者陰天使用，效果會大大提高。

lingwai，bukeyushajunjihunyong。rukuaizhuangermeijun，zuoweiyizhongzhenjunshachongji，yaoxiaoshitongguokuaizhuangermeijundehuobaozizuoyonglaishixiande。danzuoweiyizhonghuotizhenjun，ruguoyushajunjihunyong，tamenbeishajunjizhisi
，ziranshiqushachong
、殺菌的作用。