根據反映的情況,棉花確有可能受到了乙草胺藥害。棉花移栽田用乙草胺進行土壤封閉,一般每畝用禾耐斯(90%乙草胺乳油)50~60毫升或50%乙草胺乳油100~120毫升,加水30~45公斤噴霧。上述劉漢禮反映每畝棉田用50%乙草胺乳油170haosheng,yongliangpianda,kenengduimianhuachanshengyaohai。yicaoanyaoxiaodefahui,shouwenduheturangshidudeyingxiangjiaoda。zaiturangpiangandeqingkuangxia,mianzhuxishoudeyaoliangshao,jishiyicaoanyongliangdayixie,yebuhuixingchengyaohai;在(zai)連(lian)續(xu)陰(yin)雨(yu)天(tian)氣(qi)過(guo)後(hou),高(gao)溫(wen)高(gao)濕(shi)的(de)土(tu)壤(rang)環(huan)境(jing)下(xia)乙(yi)草(cao)胺(an)的(de)活(huo)性(xing)會(hui)大(da)大(da)增(zeng)強(qiang),容(rong)易(yi)對(dui)棉(mian)苗(miao)造(zao)成(cheng)藥(yao)害(hai)。藥(yao)害(hai)症(zheng)狀(zhuang)是(shi),幼(you)莖(jing)表(biao)皮(pi)呈(cheng)黃(huang)褐(he)色(se),藥(yao)害(hai)較(jiao)輕(qing)時(shi)內(nei)部(bu)維(wei)管(guan)束(shu)為(wei)綠(lv)色(se),藥(yao)害(hai)緩(huan)解(jie)後(hou),可(ke)逐(zhu)漸(jian)恢(hui)複(fu)生(sheng)長(chang);藥(yao)害(hai)較(jiao)重(zhong)時(shi),維(wei)管(guan)束(shu)受(shou)害(hai),棉(mian)苗(miao)枯(ku)萎(wei)。田(tian)間(jian)棉(mian)苗(miao)剛(gang)開(kai)始(shi)出(chu)現(xian)乙(yi)草(cao)胺(an)藥(yao)害(hai)症(zheng)狀(zhuang)時(shi),及(ji)時(shi)劃(hua)鋤(chu)破(po)除(chu)藥(yao)土(tu)層(ceng),將(jiang)表(biao)土(tu)曬(shai)幹(gan),可(ke)以(yi)減(jian)少(shao)棉(mian)花(hua)吸(xi)收(shou)藥(yao)物(wu)的(de)量(liang),防(fang)止(zhi)藥(yao)害(hai)進(jin)一(yi)步(bu)發(fa)展(zhan)。棉(mian)花(hua)受(shou)害(hai)後(hou),使(shi)用(yong)促(cu)生(sheng)長(chang)型(xing)植(zhi)物(wu)生(sheng)長(chang)調(tiao)節(jie)劑(ji)如(ru)玉(yu)米(mi)素(su)、吲哚乙酸等,有一定的解毒作用;dapeishiyongfuzhisuanyanleiyefeirubaishilideng,youzhuyumianmiaohuifu。duidamianjimianmiaoshouhaiyanzhong,mianmiaonanyihuifushengchangdediduanhuotiankuai,zuihaoqiangshijiangaizhongyumi、大豆等對乙草胺抗性較強的作物,以減輕損失。這些田塊中正常或基本正常的棉苗,可以帶土移栽到受害輕的田塊。
近期另有鹽城市的多位讀者致電農技001工(gong)作(zuo)室(shi),反(fan)映(ying)移(yi)栽(zai)棉(mian)田(tian)的(de)棉(mian)苗(miao)在(zai)前(qian)一(yi)段(duan)時(shi)間(jian)下(xia)雨(yu)過(guo)後(hou)棉(mian)苗(miao)葉(ye)片(pian)上(shang)出(chu)現(xian)褐(he)斑(ban),嚴(yan)重(zhong)的(de)棉(mian)葉(ye)枯(ku)焦(jiao)脫(tuo)落(luo),棉(mian)根(gen)腐(fu)爛(lan),整(zheng)株(zhu)枯(ku)死(si),移(yi)栽(zai)前(qian)後(hou)沒(mei)有(you)使(shi)用(yong)乙(yi)草(cao)胺(an)等(deng)除(chu)草(cao)劑(ji)的(de)田(tian)塊(kuai)棉(mian)苗(miao)也(ye)出(chu)現(xian)這(zhe)種(zhong)症(zheng)狀(zhuang)。經(jing)當(dang)地(di)農(nong)技(ji)人(ren)員(yuan)現(xian)場(chang)診(zhen)斷(duan),受(shou)害(hai)棉(mian)花(hua)的(de)維(wei)管(guan)束(shu)沒(mei)有(you)病(bing)變(bian),可(ke)以(yi)排(pai)除(chu)枯(ku)萎(wei)病(bing)和(he)黃(huang)萎(wei)病(bing)的(de)可(ke)能(neng),可(ke)能(neng)是(shi)棉(mian)苗(miao)在(zai)陰(yin)雨(yu)天(tian)受(shou)到(dao)了(le)土(tu)壤(rang)腐(fu)生(sheng)菌(jun)的(de)危(wei)害(hai),推(tui)薦(jian)使(shi)用(yong)惡(e)黴(mei)靈(ling)、敵克鬆、銅高尚以及三唑酮與多菌靈的複配劑等藥劑防治,並結合使用百施利等腐植酸鹽類液肥促進棉苗恢複生長。發病重的田塊最好改種玉米、大豆等作物。
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