一、農用殺蟲劑殘留多久失效

農藥殺(sha)蟲劑(ji)是(shi)毒性(xing)較大(da)的農藥，使用后(hou)通常會有一定(ding)的農藥殘留，殘留期一般需要根據殺(sha)蟲劑(ji)品種(zhong)和(he)性(xing)狀而(er)定(ding)，一般來講(jiang)，乳油、懸(xuan)浮劑(ji)等用于直接(jie)噴灑的劑(ji)型對(dui)農作物(wu)的污染相對(dui)要大(da)一些(xie)，而(er)粉劑(ji)由于其容易飄散而(er)對(dui)環境和(he)施(shi)藥者的危害更大(da)，下面是(shi)幾(ji)種(zhong)常用農藥殺(sha)蟲劑(ji)的殘留期：

10%氯氰菊(ju)酯(zhi)乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)2-5天(tian)(tian)(tian)(tian)(tian)；2.5%溴氯菊(ju)酯(zhi)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)2天(tian)(tian)(tian)(tian)(tian)；5%抗蚜威(wei)可(ke)濕性(xing)粉劑殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)6天(tian)(tian)(tian)(tian)(tian)；1.8%愛福廠乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)7天(tian)(tian)(tian)(tian)(tian)；40.7%樂斯本乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)7天(tian)(tian)(tian)(tian)(tian)；20%滅掃利乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)3天(tian)(tian)(tian)(tian)(tian)；20%氰戊菊(ju)酯(zhi)乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)5天(tian)(tian)(tian)(tian)(tian)；35%優殺硫磷殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)7天(tian)(tian)(tian)(tian)(tian)；20%甲氰菊(ju)酯(zhi)乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)3天(tian)(tian)(tian)(tian)(tian)；10%馬撲立克乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)7天(tian)(tian)(tian)(tian)(tian)；25%喹硫磷乳(ru)油(you)(you)殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)9天(tian)(tian)(tian)(tian)(tian)；50%抗蚜威(wei)可(ke)濕性(xing)粉劑殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)6天(tian)(tian)(tian)(tian)(tian)；5%多來寶可(ke)濕性(xing)粉劑殘(can)(can)(can)留期(qi)(qi)為(wei)(wei)(wei)7天(tian)(tian)(tian)(tian)(tian)。

溫馨提示：以上是(shi)正常使(shi)用情況下的殘留(liu)期，如果遇(yu)到下雨的話，大概殘留(liu)1-2小時(shi)就會失效。

該圖片由注冊用戶"荊湖酒徒"提供，版權聲明反饋

二、如何去除農藥殺蟲劑的殘留

農(nong)業生產中為了減少蟲(chong)害(hai)，會(hui)使用農(nong)藥(yao)殺蟲(chong)劑(ji)，然后農(nong)藥(yao)殺蟲(chong)劑(ji)噴施后會(hui)有一定的殘留(liu)，如果擔心的話，可以采取以下方(fang)法進行處理：

1、堿水浸泡法

先將蔬菜水(shui)果表面(mian)沖洗干凈，在堿水(shui)中(zhong)浸泡5～10分鐘，然后用清水(shui)沖洗2～3遍。

2、臭氧洗脫法

用市售(shou)的臭氧發生(sheng)器清(qing)洗(xi)(xi)和浸(jin)泡各(ge)類瓜果蔬菜，清(qing)洗(xi)(xi)和浸(jin)泡時間為10～20分鐘，可(ke)清(qing)除大部分農藥(yao)殘(can)留。

3、儲存法

部(bu)分農藥(yao)可(ke)隨時(shi)(shi)間流逝緩慢地分解為對人(ren)體無害(hai)的物質，因此對易于保存(cun)的瓜(gua)果(guo)蔬菜(cai)可(ke)通過(guo)一(yi)定時(shi)(shi)間的存(cun)放而減少農藥(yao)殘留(liu)量。此法(fa)適(shi)用于蘋果(guo)、冬(dong)瓜(gua)等不易腐爛的水(shui)果(guo)蔬菜(cai)。這類水(shui)果(guo)蔬菜(cai)一(yi)般存(cun)放15天以上，即可(ke)去除大部(bu)分農藥(yao)殘留(liu)。

4、加熱法

氨基(ji)甲(jia)酸(suan)酯類殺蟲劑會隨溫(wen)度升高(gao)而加(jia)(jia)快分解，因此可(ke)通過加(jia)(jia)熱去除部分農藥殘留。此法可(ke)用(yong)于芹(qin)菜(cai)(cai)(cai)、菠(bo)菜(cai)(cai)(cai)、小白(bai)菜(cai)(cai)(cai)、圓白(bai)菜(cai)(cai)(cai)、青(qing)椒(jiao)、菜(cai)(cai)(cai)花、豆角等。先用(yong)清水將(jiang)蔬菜(cai)(cai)(cai)表面(mian)洗(xi)凈，再放(fang)入(ru)沸(fei)水中焯2～5分鐘，再用(yong)清水沖洗(xi)1～2遍即可(ke)。

三、怎么預防農用殺蟲劑殘留危害

1、多買有(you)機食(shi)品(pin)。有(you)機農產品(pin)檢(jian)測(ce)到(dao)的殺蟲(chong)劑含量(liang)遠低(di)于常規種植的食(shi)品(pin)。

2、徹底清洗(xi)果蔬。把水果或蔬菜放在流動的水下面沖(chong)洗(xi)，能比浸泡更有效地去除殘余農藥。