清潔田園棉花紅(hong)(hong)鈴(ling)蟲、紅(hong)(hong)蜘蛛(zhu)、蚜蟲、盲椿象、炭疽病(bing)菌、立枯病(bing)菌等,可在棉田(tian)(tian)遺留的枯枝、落(luo)葉、爛鈴(ling)以及(ji)(ji)雜草上越(yue)冬(dong)。徹(che)底(di)清(qing)除(chu)枯枝、落(luo)葉、爛鈴(ling),鏟(chan)除(chu)田(tian)(tian)內(nei)及(ji)(ji)四周雜草,可有效地消滅越(yue)冬(dong)病(bing)蟲。清(qing)除(chu)物要及(ji)(ji)時深埋,切(qie)忌堆積在田(tian)(tian)邊。
深耕(geng)灌(guan)(guan)(guan)(guan)水(shui)、棉鈴蟲、地老(lao)虎、斜紋夜盜蛾等在(zai)土(tu)壤中越冬(dong)(dong),可采用深耕(geng)灌(guan)(guan)(guan)(guan)水(shui)措施(shi)殺滅。此法(fa)效(xiao)果顯著,棉鈴蟲的死(si)亡率可達(da)90%以(yi)上(shang)。深耕(geng)深度30-40厘米,把(ba)表土(tu)翻到(dao)下面(mian),底(di)土(tu)翻到(dao)上(shang)面(mian)。冬(dong)(dong)灌(guan)(guan)(guan)(guan)宜在(zai)三九天進(jin)行,要灌(guan)(guan)(guan)(guan)透灌(guan)(guan)(guan)(guan)勻。一般每畝(mu)灌(guan)(guan)(guan)(guan)水(shui)量為80-120立方米,黏土(tu)田應(ying)略多灌(guan)(guan)(guan)(guan)一些,方式(shi)以(yi)溝灌(guan)(guan)(guan)(guan)為好(hao),忌大水(shui)漫灌(guan)(guan)(guan)(guan)。
藥劑熏蒸炭疽病菌、角斑病菌、紅腐病和紅鈴蟲等多種病蟲,可附著在種子內外(wai)越(yue)冬。可將貯種倉(cang)庫密(mi)封(feng),每立(li)方米空間用溴(xiu)化甲(jia)烷(wan)32-37克熏殺,密(mi)閉3天(tian),可殺死棉種中98%的(de)紅鈴蟲及部分病原菌。棉花(hua)紅鈴蟲幼(you)蟲主要(yao)躲在(zai)(zai)貯存棉花(hua)的(de)倉(cang)庫四壁縫隙(xi)(xi)和運貯工(gong)具(ju)的(de)空隙(xi)(xi)中越(yue)冬,因(yin)此,可在(zai)(zai)貯存棉花(hua)前(qian)對倉(cang)庫內的(de)墻壁用石灰漿噴(pen)刷,填平間隙(xi)(xi),然后用50%敵敵畏乳劑100倍液,噴(pen)在(zai)(zai)墻上地面,再(zai)放棉花(hua),封(feng)嚴門窗,毒殺紅鈴蟲。













