一、怎么噴農藥殺蟲劑效果更好

在給農作物噴灑農藥殺蟲(chong)劑的(de)時候，主(zhu)要注(zhu)意兩個方面(mian)，效果會(hui)更好：

1、根據氣候特點和害蟲的晝夜活動規律，選擇在有利的時間施藥

施(shi)用農(nong)藥(yao)殺蟲(chong)劑的時間(jian)以上(shang)(shang)(shang)午(wu)(wu)9時--10時和(he)下午(wu)(wu)4時以后(hou)為宜。因為上(shang)(shang)(shang)午(wu)(wu)9時以后(hou)，作物葉片上(shang)(shang)(shang)露水(shui)已干(gan),又(you)正是日出性害(hai)(hai)(hai)蟲(chong)活(huo)動(dong)最盛的時候。在(zai)這個時候施(shi)藥(yao)，既(ji)不會因為露水(shui)沖淡藥(yao)液影(ying)響防治效(xiao)果，又(you)可(ke)使(shi)害(hai)(hai)(hai)蟲(chong)與農(nong)藥(yao)直接接觸，增加(jia)害(hai)(hai)(hai)蟲(chong)中毒(du)機(ji)會。下午(wu)(wu)4時以后(hou)，太陽偏西，光照(zhao)減(jian)弱，溫度降(jiang)低，而且(qie)正是黃(huang)(huang)昏(hun)時飛(fei)翔(xiang)活(huo)動(dong)和(he)夜出性害(hai)(hai)(hai)蟲(chong)即(ji)將(jiang)出動(dong)的時候，在(zai)這個時間(jian)施(shi)藥(yao)，能提(ti)前將(jiang)藥(yao)劑施(shi)于作物上(shang)(shang)(shang)，待害(hai)(hai)(hai)蟲(chong)在(zai)黃(huang)(huang)昏(hun)和(he)夜間(jian)出來活(huo)動(dong)或取食(shi)時使(shi)其接觸毒(du)液或取食(shi)中毒(du)死(si)亡，同時還可(ke)避免藥(yao)液蒸發損失和(he)光解失效(xiao)。

該圖片由注冊用戶"荊湖酒徒"提供，版權聲明反饋

2、要根據害蟲的危害部位，選用不同的藥劑和采取不同的施藥方法，送藥到位

如對(dui)危害根部(bu)(bu)(bu)的(de)害蟲(chong)(chong)(chong)(chong)，就將(jiang)藥(yao)(yao)劑(ji)灌施(shi)(shi)于根部(bu)(bu)(bu)或(huo)(huo)施(shi)(shi)于播種溝內(nei)；對(dui)在(zai)葉(xie)(xie)背面取食的(de)害蟲(chong)(chong)(chong)(chong)就將(jiang)藥(yao)(yao)液噴在(zai)葉(xie)(xie)片的(de)反面；防(fang)(fang)治(zhi)紅鈴(ling)蟲(chong)(chong)(chong)(chong)、棉鈴(ling)蟲(chong)(chong)(chong)(chong)就把藥(yao)(yao)打到(dao)(dao)花(hua)(hua)蕾(lei)、青(qing)鈴(ling)上及群尖上；防(fang)(fang)治(zhi)螟蟲(chong)(chong)(chong)(chong)造成枯心苗(miao)就撒毒土；防(fang)(fang)治(zhi)白穗(sui)就噴霧或(huo)(huo)潑澆(jiao)；防(fang)(fang)治(zhi)稻(dao)飛虱、稻(dao)葉(xie)(xie)蟬就將(jiang)藥(yao)(yao)液噴施(shi)(shi)到(dao)(dao)稻(dao)株(zhu)基(ji)部(bu)(bu)(bu)；防(fang)(fang)治(zhi)斜紋夜蛾就將(jiang)藥(yao)(yao)液噴到(dao)(dao)花(hua)(hua)蕾(lei)及幼莢上。此(ci)外，對(dui)棉蚜、紅蜘蛛、稻(dao)飛虱、稻(dao)葉(xie)(xie)蟬等隱蔽性(xing)害蟲(chong)(chong)(chong)(chong)，根據其(qi)(qi)刺吸式(shi)口(kou)器(qi)取食方式(shi)，可選用內(nei)吸性(xing)強的(de)殺(sha)蟲(chong)(chong)(chong)(chong)劑(ji)吸收后傳到(dao)(dao)植株(zhu)的(de)其(qi)(qi)他部(bu)(bu)(bu)位(wei)(wei)，達到(dao)(dao)送(song)(song)藥(yao)(yao)到(dao)(dao)位(wei)(wei)的(de)目的(de)。只(zhi)有因蟲(chong)(chong)(chong)(chong)施(shi)(shi)藥(yao)(yao)，送(song)(song)藥(yao)(yao)到(dao)(dao)位(wei)(wei)，才能抓住弱點(dian)，擊(ji)中要害，實現藥(yao)(yao)到(dao)(dao)蟲(chong)(chong)(chong)(chong)除的(de)功效，使(shi)藥(yao)(yao)劑(ji)發揮出最好(hao)的(de)作(zuo)用，獲得理想的(de)殺(sha)蟲(chong)(chong)(chong)(chong)效果。

二、農業殺蟲劑噴完多久可以澆水

農藥殺蟲劑的噴灑需要等待一段時間讓它發揮作用，如果噴完立馬就澆水或者下雨的話，會導致殺蟲劑失效，那么農藥殺蟲劑噴(pen)完(wan)多久可以澆水(shui)呢？

一般來說，不(bu)同種類的農(nong)藥(yao)殺蟲(chong)劑見效時(shi)(shi)間(jian)不(bu)同，普通(tong)的農(nong)藥(yao)殺蟲(chong)劑需要5~6個(ge)小(xiao)時(shi)(shi)，才能(neng)發(fa)揮(hui)作用，好的可能(neng)3~4個(ge)小(xiao)時(shi)(shi)就夠了(le)(le)，正常情況(kuang)下，打完4個(ge)小(xiao)時(shi)(shi)后(hou)，基本藥(yao)效和(he)作用已經(jing)達到了(le)(le)，這時(shi)(shi)候澆(jiao)水(shui)沒什(shen)么太大的影(ying)響，不(bu)過(guo)為(wei)了(le)(le)讓藥(yao)效更好發(fa)揮(hui)，建議(yi)等(deng)十二(er)個(ge)小(xiao)時(shi)(shi)后(hou)再澆(jiao)水(shui)，為(wei)了(le)(le)防止農(nong)作物缺(que)水(shui)，可以在噴農(nong)藥(yao)殺蟲(chong)劑之(zhi)前先澆(jiao)一次水(shui)。