冬季深耕、細耙、灌水既是棉花增產的重(zhong)要(yao)措施(shi)，也是消滅(mie)越冬(dong)棉鈴蟲的有效方法(fa)。

 　1.冬(dong)(dong)(dong)季深(shen)耕(geng)(geng)。棉鈴蟲(chong)(chong)一般(ban)在(zai)距(ju)地面2.5-6厘米（深(shen)的(de)(de)可達9厘米）處化(hua)(hua)蛹越(yue)(yue)冬(dong)(dong)(dong)，冬(dong)(dong)(dong)耕(geng)(geng)可以(yi)破壞蛹室，改變蛹體的(de)(de)自然狀態，降低翌春羽化(hua)(hua)率；可以(yi)將部分(fen)蟲(chong)(chong)蛹翻(fan)至地表，使其(qi)干死(si)、凍死(si)或被天敵啄食；可以(yi)將部分(fen)蟲(chong)(chong)蛹翻(fan)人(ren)土(tu)壤深(shen)層(ceng)，使其(qi)不能(neng)正常羽化(hua)(hua)出土(tu)而被悶死(si)，從而減少越(yue)(yue)冬(dong)(dong)(dong)蟲(chong)(chong)源(yuan)。冬(dong)(dong)(dong)耕(geng)(geng)時間(jian)越(yue)(yue)早越(yue)(yue)好(hao)，一般(ban)在(zai)前茬作物收獲后就要(yao)抓緊(jin)進(jin)行(xing)，在(zai)大(da)地封凍前（凍土(tu)層(ceng)超過5厘米）耕(geng)(geng)完(wan)，以(yi)延長風化(hua)(hua)時間(jian)，提高滅蟲(chong)(chong)效果(guo)，并有利(li)于多接納雨雪(xue)。耕(geng)(geng)翻(fan)深(shen)度應在(zai)10厘米以(yi)上；冬(dong)(dong)(dong)耕(geng)(geng)越(yue)(yue)深(shen)，滅蟲(chong)(chong)效果(guo)越(yue)(yue)好(hao)。需(xu)要(yao)說明的(de)(de)是，由于棉鈴蟲(chong)(chong)成蟲(chong)(chong)飛翔能(neng)力強，冬(dong)(dong)(dong)耕(geng)(geng)滅蟲(chong)(chong)必須大(da)面積進(jin)行(xing)才能(neng)有效；除(chu)預留的(de)(de)棉花白茬地外，麥(mai)田套種行(xing)、果(guo)園空白地等，也(ye)要(yao)進(jin)行(xing)冬(dong)(dong)(dong)耕(geng)(geng)。

　　2.耕耙(pa)(pa)結合。冬(dong)耕前先耙(pa)(pa)一遍，耕翻后(hou)再(zai)細耙(pa)(pa)碎(sui)垡，可以蓄水保墑，并能耙(pa)(pa)死部(bu)分越冬(dong)蟲(chong)蛹。據調查(cha)，棉田冬(dong)耕先耙(pa)(pa)，能耙(pa)(pa)死76-85.6％的棉鈴(ling)蟲(chong)蛹，冬(dong)耕后(hou)蛹被埋(mai)入(ru)土壤深層，可使成活率(lv)降低(di)86.4-92.5％；另據山東省農科院觀測，冬(dong)耕后(hou)接著耙(pa)(pa)地，春(chun)季(ji)5厘(li)米土層含(han)水量為16.4％，而未耙(pa)(pa)的僅(jin)8.2％。

　　3.耕后灌(guan)水(shui)。冬(dong)(dong)耕后接(jie)著冬(dong)(dong)灌(guan)或春灌(guan)，不僅能(neng)沉實、風化(hua)(hua)土(tu)壤(rang)，而且還能(neng)提(ti)高越冬(dong)(dong)蛹(yong)(yong)的(de)死亡率(lv)(lv)。據中(zhong)國農科院(yuan)研究(jiu)，土(tu)壤(rang)相對含(han)水(shui)量(liang)在40％時(shi)，棉鈴蟲(chong)蛹(yong)(yong)死亡率(lv)(lv)為(wei)(wei)35.7％，成(cheng)蟲(chong)羽(yu)化(hua)(hua)率(lv)(lv)為(wei)(wei)40％；土(tu)壤(rang)含(han)水(shui)量(liang)在70％時(shi)，棉鈴蟲(chong)蛹(yong)(yong)死亡率(lv)(lv)為(wei)(wei)46.7％，成(cheng)蟲(chong)羽(yu)化(hua)(hua)率(lv)(lv)為(wei)(wei)33.3％；當土(tu)壤(rang)含(han)水(shui)量(liang)達到飽和狀態時(shi)，蛹(yong)(yong)的(de)死亡率(lv)(lv)為(wei)(wei)100％。另有資料(liao)表明，冬(dong)(dong)耕冬(dong)(dong)灌(guan)的(de)地塊，棉鈴蟲(chong)蛹(yong)(yong)越冬(dong)(dong)死亡率(lv)(lv)在80％左右，只耕不灌(guan)的(de)地塊越冬(dong)(dong)死亡率(lv)(lv)為(wei)(wei)60-70％，不耕不灌(guan)的(de)地塊只有30-40％。