6月份以(yi)來，水稻(dao)(dao)”兩遷”害(hai)蟲(chong)不斷遷入我(wo)(wo)省(sheng)，受前期(qi)雨(yu)日、雨(yu)量多(duo)的影響(xiang)，三(san)（1）代稻(dao)(dao)縱卷葉螟防效不理想(xiang)，殘留蟲(chong)量普(pu)遍較高,褐(he)飛(fei)(fei)虱遷入量和(he)田間蟲(chong)量大，加上(shang)我(wo)(wo)國南(nan)方(fang)稻(dao)(dao)區“兩遷”害(hai)蟲(chong)發(fa)(fa)生(sheng)(sheng)(sheng)(sheng)偏(pian)重(zhong)，預計7月上(shang)旬仍將有大量的蟲(chong)源(yuan)遷入我(wo)(wo)省(sheng)。預計我(wo)(wo)省(sheng)四（2）代稻(dao)(dao)縱卷葉螟中(zhong)等(deng)偏(pian)重(zhong)發(fa)(fa)生(sheng)(sheng)(sheng)(sheng)，局(ju)部大發(fa)(fa)生(sheng)(sheng)(sheng)(sheng)；四（2）代白(bai)背飛(fei)(fei)虱在單季雜(za)交秈稻(dao)(dao)中(zhong)等(deng)偏(pian)重(zhong)發(fa)(fa)生(sheng)(sheng)(sheng)(sheng)，浙西北部有大發(fa)(fa)生(sheng)(sheng)(sheng)(sheng)的趨勢。
稻(dao)(dao)縱(zong)卷葉螟：6月(yue)(yue)(yue)23－24日(ri)(ri)各地田(tian)(tian)間(jian)出現遷入峰(feng)，畝(mu)(mu)(mu)蛾(e)量(liang)(liang)(liang)(liang)一般(ban)(ban)為(wei)(wei)(wei)300－500頭(tou)(tou)(tou)，高的(de)(de)達1000頭(tou)(tou)(tou)以上(shang)； 6月(yue)(yue)(yue)29日(ri)(ri)－7月(yue)(yue)(yue)2日(ri)(ri)各稻(dao)(dao)區(qu)再(zai)次(ci)出現遷入峰(feng)，畝(mu)(mu)(mu)蛾(e)量(liang)(liang)(liang)(liang)一般(ban)(ban)為(wei)(wei)(wei)250－700頭(tou)(tou)(tou)，此峰(feng)蛾(e)量(liang)(liang)(liang)(liang)還再(zai)增(zeng)加(jia)，但地區(qu)間(jian)、田(tian)(tian)塊(kuai)間(jian)發生不平衡。畝(mu)(mu)(mu)蛾(e)量(liang)(liang)(liang)(liang)：溫州6月(yue)(yue)(yue)30日(ri)(ri)早(zao)插早(zao)稻(dao)(dao)為(wei)(wei)(wei)274頭(tou)(tou)(tou)，遲(chi)插早(zao)稻(dao)(dao)為(wei)(wei)(wei)660頭(tou)(tou)(tou)；蒼南6月(yue)(yue)(yue)29日(ri)(ri)為(wei)(wei)(wei)382頭(tou)(tou)(tou)；瑞安(an)為(wei)(wei)(wei)370-570頭(tou)(tou)(tou)/畝(mu)(mu)(mu)；淳安(an)7月(yue)(yue)(yue)1日(ri)(ri)雜(za)草蛾(e)量(liang)(liang)(liang)(liang)突增(zeng)，平均(jun)411頭(tou)(tou)(tou)（幅(fu)(fu)度(du)(du)333－533頭(tou)(tou)(tou)）；椒(jiao)(jiao)江(jiang)7月(yue)(yue)(yue)2日(ri)(ri)突增(zeng)，蛾(e)量(liang)(liang)(liang)(liang)為(wei)(wei)(wei)270頭(tou)(tou)(tou)。6月(yue)(yue)(yue)25－30日(ri)(ri)調(diao)查，早(zao)稻(dao)(dao)田(tian)(tian)三（1）代(dai)殘蟲(chong)(chong)(chong)量(liang)(liang)(liang)(liang)一般(ban)(ban)田(tian)(tian)百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)6－50頭(tou)(tou)(tou)，高的(de)(de)60頭(tou)(tou)(tou)以上(shang)，如江(jiang)山市(shi)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)18頭(tou)(tou)(tou)（0－116頭(tou)(tou)(tou)）；龍游縣(xian)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)20頭(tou)(tou)(tou)；天(tian)臺縣(xian)早(zao)稻(dao)(dao)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)78頭(tou)(tou)(tou)，單(dan)(dan)(dan)(dan)季稻(dao)(dao)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)48頭(tou)(tou)(tou)（0－117頭(tou)(tou)(tou)）；臨海市(shi)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)63條(tiao)(tiao)(tiao)(tiao)（47－80條(tiao)(tiao)(tiao)(tiao)）；蘭溪市(shi)殘蟲(chong)(chong)(chong)為(wei)(wei)(wei)9頭(tou)(tou)(tou)（5－15頭(tou)(tou)(tou)）。6月(yue)(yue)(yue)25－30日(ri)(ri)田(tian)(tian)間(jian)卵(luan)量(liang)(liang)(liang)(liang)調(diao)查：天(tian)臺早(zao)稻(dao)(dao)百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)卵(luan)量(liang)(liang)(liang)(liang)200粒(li)(li)(li)，單(dan)(dan)(dan)(dan)季稻(dao)(dao)百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)卵(luan)量(liang)(liang)(liang)(liang)25粒(li)(li)(li)（0－100粒(li)(li)(li)）。椒(jiao)(jiao)江(jiang)區(qu)7月(yue)(yue)(yue)2日(ri)(ri)早(zao)插單(dan)(dan)(dan)(dan)晚畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)81萬(wan)粒(li)(li)(li)，早(zao)稻(dao)(dao)田(tian)(tian)有蟲(chong)(chong)(chong)113條(tiao)(tiao)(tiao)(tiao)/百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)（幅(fu)(fu)度(du)(du)40－220條(tiao)(tiao)(tiao)(tiao) ），以1、2齡為(wei)(wei)(wei)主。三門縣(xian)早(zao)稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)2.04萬(wan)粒(li)(li)(li)，單(dan)(dan)(dan)(dan)季稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)0.46萬(wan)粒(li)(li)(li)。建德市(shi)早(zao)稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)為(wei)(wei)(wei)4萬(wan)粒(li)(li)(li)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)380頭(tou)(tou)(tou)（幅(fu)(fu)度(du)(du)200－923條(tiao)(tiao)(tiao)(tiao)），比2007年分別增(zeng)3.8倍和2.2倍；單(dan)(dan)(dan)(dan)季晚稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)0.94萬(wan)粒(li)(li)(li)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)為(wei)(wei)(wei)95條(tiao)(tiao)(tiao)(tiao)（幅(fu)(fu)度(du)(du)25－200條(tiao)(tiao)(tiao)(tiao)）。蕭山早(zao)稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)17.3萬(wan)粒(li)(li)(li)/畝(mu)(mu)(mu)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)27條(tiao)(tiao)(tiao)(tiao)，單(dan)(dan)(dan)(dan)季稻(dao)(dao)畝(mu)(mu)(mu)卵(luan)量(liang)(liang)(liang)(liang)為(wei)(wei)(wei)0.2萬(wan)粒(li)(li)(li)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)14條(tiao)(tiao)(tiao)(tiao)（4－20條(tiao)(tiao)(tiao)(tiao)）；桐廬單(dan)(dan)(dan)(dan)季稻(dao)(dao)百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)卵(luan)量(liang)(liang)(liang)(liang)為(wei)(wei)(wei)20－30粒(li)(li)(li)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)為(wei)(wei)(wei)20－40頭(tou)(tou)(tou)，其中(zhong)早(zao)插嫩(nen)綠(lv)單(dan)(dan)(dan)(dan)季稻(dao)(dao)百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)卵(luan)量(liang)(liang)(liang)(liang)為(wei)(wei)(wei)60－100粒(li)(li)(li)，百(bai)(bai)(bai)(bai)叢(cong)(cong)(cong)(cong)幼(you)(you)蟲(chong)(chong)(chong)為(wei)(wei)(wei)140－340條(tiao)(tiao)(tiao)(tiao)。
白背(bei)(bei)飛(fei)虱：6月(yue)27－29日(ri)(ri)(ri)在溫(wen)(wen)州、臺州出(chu)現遷入峰(feng)外，其他稻(dao)區無明顯遷入峰(feng)，如溫(wen)(wen)州市(shi)(shi)站6月(yue)28日(ri)(ri)(ri)燈誘(you)896頭(tou)(tou)、29日(ri)(ri)(ri)燈誘(you)664頭(tou)(tou)；平(ping)陽市(shi)(shi)站6月(yue)27日(ri)(ri)(ri)燈誘(you)940頭(tou)(tou)；椒江6月(yue)29日(ri)(ri)(ri)燈誘(you)705頭(tou)(tou)；黃(huang)巖6月(yue)25－26日(ri)(ri)(ri)燈誘(you)565頭(tou)(tou)。6月(yue)26－30日(ri)(ri)(ri)調(diao)查(cha)，大部(bu)分(fen)早(zao)稻(dao)田(tian)白背(bei)(bei)飛(fei)虱為100－280頭(tou)(tou)/百叢(cong)(cong)(cong)，幅度為55－2900頭(tou)(tou)/百叢(cong)(cong)(cong)，浙(zhe)(zhe)中南(nan)單季(ji)稻(dao)蟲量(liang)為150－660頭(tou)(tou)/百叢(cong)(cong)(cong)，卵量(liang)為20－81萬粒/畝；浙(zhe)(zhe)西北單季(ji)稻(dao)蟲量(liang)為500－800頭(tou)(tou)/百叢(cong)(cong)(cong)，蟲量(liang)比大發生的(de)去(qu)年(nian)(nian)增(zeng)30%－5倍(bei)，但局部(bu)稻(dao)區因(yin)大雨沖刷受淹，當前田(tian)間蟲量(liang)較去(qu)年(nian)(nian)低，比常年(nian)(nian)高(gao)。椒江區站7月(yue)2日(ri)(ri)(ri)調(diao)查(cha)，早(zao)插單晚畝卵量(liang)81萬粒；桐廬(lu)單晚田(tian)調(diao)查(cha)，白背(bei)(bei)飛(fei)虱665頭(tou)(tou)／百叢(cong)(cong)(cong)，建德早(zao)稻(dao)田(tian)調(diao)查(cha)，百叢(cong)(cong)(cong)為180頭(tou)(tou)，分(fen)別比去(qu)年(nian)(nian)同期增(zeng)0.48、7.78倍(bei)。
褐(he)(he)飛(fei)虱(shi) 今年褐(he)(he)飛(fei)虱(shi)初見(jian)(jian)期和初次遷入峰均(jun)比(bi)前(qian)幾年早，全省大多數(shu)稻(dao)區(qu)(qu)已遷入褐(he)(he)飛(fei)虱(shi)，6月23－27日部分稻(dao)區(qu)(qu)出現遷入峰，到目前(qian)為(wei)止燈下誘蟲(chong)(chong)量(liang)和單季晚稻(dao)田(tian)間蟲(chong)(chong)量(liang)均(jun)高(gao)于常年，部分稻(dao)區(qu)(qu)高(gao)于去年。黃巖(yan)區(qu)(qu)站6月27日燈誘28頭(tou)(tou)，累(lei)計燈誘47頭(tou)(tou)，比(bi)去年同期增1.9倍。建德6月24日止共燈誘褐(he)(he)飛(fei)虱(shi)424頭(tou)(tou)，比(bi)去年同期增4.97倍。海鹽市6月23日燈誘172頭(tou)(tou)。田(tian)間蟲(chong)(chong)量(liang)：嘉興市站6月26日早插單晚調查，褐(he)(he)飛(fei)虱(shi)長翅型(xing)成(cheng)蟲(chong)(chong)平均(jun)百叢(cong)蟲(chong)(chong)量(liang)為(wei)0.57頭(tou)(tou)（幅(fu)度0－3頭(tou)(tou)），高(gao)于去年同期的(de)0.29頭(tou)(tou)。黃巖(yan)6月30日田(tian)間調查，未(wei)防治(zhi)田(tian)成(cheng)蟲(chong)(chong)平均(jun)百叢(cong)為(wei)26頭(tou)(tou)。建德6月29日早稻(dao)田(tian)調查，褐(he)(he)飛(fei)虱(shi)百叢(cong)為(wei)22頭(tou)(tou)，去年同期尚未(wei)見(jian)(jian)。
據省氣候中心預報，7月上旬受副熱帶高壓西伸北抬的影響，大范圍的梅雨強降水形勢將逐漸轉變成局部的午后雷陣雨天氣，對“兩遷”害蟲的遷入和繁殖仍較為有利。各地要密切關注水稻“兩遷”害蟲的發生動態，切實加強田間蟲卵量的調查，根據當地蟲情，科學指導防控工作。早稻四（2）代稻縱卷葉螟和白背飛虱的防治重點是遲熟早稻；單季晚稻稻縱卷葉螟防治要利用水稻生長前期補償能力強的特點，掌握在2－3齡幼蟲高峰期（大發生時提早到1－2齡高峰）達標防治，推廣使用31%氟腈·唑磷ME70－90ml/畝或5%氟蟲腈SC45－50ml/畝彌霧或細噴霧，對于白背飛虱蟲量較高的稻田可同時混用吡蟲啉，盡量減少用藥面積，同時在單季晚稻前期防治時不要推薦使用對蜘蛛等天敵殺傷力大的藥劑，以充分發揮稻田的自然控害能力，減輕中后期病蟲防控壓力，實現控害、減量、護益、增效目的。
來源：浙(zhe)江省植物保護檢疫局
