6月(yue)16－17日，我局在(zai)杭州召(zhao)開了“早稻中(zhong)(zhong)(zhong)后(hou)期(qi)病(bing)蟲(chong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)趨(qu)勢會商會”，與會代表依(yi)據當前病(bing)蟲(chong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)情(qing)況和(he)歷年病(bing)蟲(chong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)規律、早稻長勢及未來氣候趨(qu)勢等(deng)綜合分析，預(yu)計今年我省早稻中(zhong)(zhong)(zhong)后(hou)期(qi)病(bing)蟲(chong)總體為(wei)中(zhong)(zhong)(zhong)偏(pian)重(zhong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)，其(qi)發(fa)(fa)(fa)(fa)生(sheng)(sheng)程度(du)接近去(qu)年。其(qi)中(zhong)(zhong)(zhong)稻縱卷葉螟、白(bai)背飛虱(shi)、紋枯病(bing)為(wei)中(zhong)(zhong)(zhong)偏(pian)重(zhong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)，局部大發(fa)(fa)(fa)(fa)生(sheng)(sheng)；灰飛虱(shi)在(zai)寧波和(he)紹(shao)興早稻上偏(pian)重(zhong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)；二代二化螟為(wei)中(zhong)(zhong)(zhong)等(deng)發(fa)(fa)(fa)(fa)生(sheng)(sheng)，局部中(zhong)(zhong)(zhong)偏(pian)重(zhong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)。
一、主(zhu)要病蟲發生趨勢
稻縱(zong)卷葉螟 遷(qian)入期早(zao)，遷(qian)入量大(da)，全省大(da)部(bu)分(fen)早(zao)稻為中偏重(zhong)發(fa)(fa)生(sheng)(sheng)，局部(bu)大(da)發(fa)(fa)生(sheng)(sheng)，但(dan)地區間(jian)、田塊(kuai)間(jian)發(fa)(fa)生(sheng)(sheng)差(cha)異較大(da)，發(fa)(fa)生(sheng)(sheng)面積約220萬畝次。
稻飛(fei)虱(shi)(shi) 田間(jian)以白(bai)背飛(fei)虱(shi)(shi)和灰飛(fei)虱(shi)(shi)為(wei)主，白(bai)背飛(fei)虱(shi)(shi)為(wei)中(zhong)偏重(zhong)發(fa)生(sheng)，局(ju)部大發(fa)生(sheng)。寧波、紹興等地灰飛(fei)虱(shi)(shi)田間(jian)蟲量較高的稻區中(zhong)偏重(zhong)發(fa)生(sheng)。發(fa)生(sheng)面積約210萬畝次。
二化螟(ming) 一(yi)代(dai)(dai)二化螟(ming)殘蟲量除溫(wen)州和衢(qu)(qu)州部分縣(xian)（市）高于(yu)去年外，其它稻(dao)區均低于(yu)去年，預計二代(dai)(dai)二化螟(ming)為中等發(fa)生，但(dan)在溫(wen)州、衢(qu)(qu)州部分一(yi)代(dai)(dai)殘留(liu)量較高的(de)稻(dao)區中偏重發(fa)生，主(zhu)要危害遲熟早稻(dao)、早播(bo)早栽單(dan)季稻(dao)本田和連(lian)晚秧田。二代(dai)(dai)二化螟(ming)發(fa)生面積約120萬畝次(ci)。
紋枯病 中偏重發生，局(ju)部大發生，發生面積約240萬畝(mu)次。
穗(sui)瘟(wen)(wen)病 在部分已發生(sheng)葉瘟(wen)(wen)的稻區穗(sui)頸瘟(wen)(wen)有(you)流行的可能。
二、預測主要依據
1．發生基數。當前田(tian)間害蟲基數比(bi)常年高，特別是稻(dao)縱卷葉(xie)螟(ming)和(he)白(bai)背飛虱遷入(ru)峰出現早，遷入(ru)量雖(sui)低于大發生的去年，但(dan)高于常年。
稻(dao)縱(zong)(zong)卷(juan)葉螟 燈下(xia)和(he)田(tian)間初(chu)見早(zao)、遷入峰(feng)出(chu)(chu)現早(zao)；遷入量(liang)(liang)低于去(qu)(qu)(qu)年(nian)(nian)，高(gao)于常(chang)(chang)年(nian)(nian)。三（1）代稻(dao)縱(zong)(zong)卷(juan)葉螟浙南(nan)稻(dao)區(qu)田(tian)間初(chu)見出(chu)(chu)現在5月(yue)(yue)22－26日(ri)(ri)(ri)(ri)(ri)(ri)，初(chu)見比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)遲2－8天(tian)(tian)，比(bi)(bi)常(chang)(chang)年(nian)(nian)早(zao)7－14天(tian)(tian)。5月(yue)(yue)28日(ri)(ri)(ri)(ri)(ri)(ri)－6月(yue)(yue)1日(ri)(ri)(ri)(ri)(ri)(ri)出(chu)(chu)現初(chu)遷入峰(feng)，峰(feng)期比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)遲3－5天(tian)(tian)，比(bi)(bi)常(chang)(chang)年(nian)(nian)早(zao)8－15天(tian)(tian)，早(zao)稻(dao)田(tian)畝(mu)(mu)(mu)(mu)(mu)蛾(e)量(liang)(liang)為(wei)(wei)30－150頭(tou)(tou)(tou)，局部稻(dao)區(qu)超過500頭(tou)(tou)(tou)，畝(mu)(mu)(mu)(mu)(mu)蛾(e)量(liang)(liang)低于去(qu)(qu)(qu)年(nian)(nian)，高(gao)于常(chang)(chang)年(nian)(nian)；6月(yue)(yue)8－12日(ri)(ri)(ri)(ri)(ri)(ri)出(chu)(chu)現第二個遷入峰(feng)，平均畝(mu)(mu)(mu)(mu)(mu)蛾(e)量(liang)(liang)為(wei)(wei)340頭(tou)(tou)(tou)，幅度94－1980頭(tou)(tou)(tou)。溫州6月(yue)(yue)10日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)134頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；蘭溪6月(yue)(yue)12日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)1980頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；龍游6月(yue)(yue)10日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)288.33頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；諸暨市6月(yue)(yue)11日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)194頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；建德6月(yue)(yue)11日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)742.8頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；臨海6月(yue)(yue)12日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)130頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；象(xiang)山6月(yue)(yue)10日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)213.6頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)；寧海6月(yue)(yue)10日(ri)(ri)(ri)(ri)(ri)(ri)為(wei)(wei)1020頭(tou)(tou)(tou)/畝(mu)(mu)(mu)(mu)(mu)。田(tian)間卵(luan)(luan)(luan)(luan)量(liang)(liang)比(bi)(bi)大發生的去(qu)(qu)(qu)年(nian)(nian)低，但高(gao)于常(chang)(chang)年(nian)(nian)。6月(yue)(yue)11－14日(ri)(ri)(ri)(ri)(ri)(ri)蟲卵(luan)(luan)(luan)(luan)量(liang)(liang)調查(cha)，早(zao)稻(dao)田(tian)畝(mu)(mu)(mu)(mu)(mu)卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)2.52萬(wan)粒，幅度為(wei)(wei)0.43－6.37萬(wan)粒，畝(mu)(mu)(mu)(mu)(mu)卵(luan)(luan)(luan)(luan)量(liang)(liang)比(bi)(bi)大發生的去(qu)(qu)(qu)年(nian)(nian)同(tong)期減(jian)(jian)少36－90%，比(bi)(bi)常(chang)(chang)年(nian)(nian)同(tong)期增15－500%。如臨海6月(yue)(yue)13日(ri)(ri)(ri)(ri)(ri)(ri)調查(cha)，卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)3萬(wan)粒/畝(mu)(mu)(mu)(mu)(mu)，比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)減(jian)(jian)72%，比(bi)(bi)常(chang)(chang)年(nian)(nian)增5倍；東陽(yang)6月(yue)(yue)12日(ri)(ri)(ri)(ri)(ri)(ri)調查(cha)，卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)1.2萬(wan)粒/畝(mu)(mu)(mu)(mu)(mu)，比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)減(jian)(jian)52%，比(bi)(bi)常(chang)(chang)年(nian)(nian)增1.4倍；龍游6月(yue)(yue)12日(ri)(ri)(ri)(ri)(ri)(ri)調查(cha)，卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)2.25萬(wan)粒/畝(mu)(mu)(mu)(mu)(mu)，比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)減(jian)(jian)39.67%；象(xiang)山6月(yue)(yue)13日(ri)(ri)(ri)(ri)(ri)(ri)調查(cha)，卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)6.37萬(wan)粒/畝(mu)(mu)(mu)(mu)(mu)；建德6月(yue)(yue)14日(ri)(ri)(ri)(ri)(ri)(ri)調查(cha)，卵(luan)(luan)(luan)(luan)量(liang)(liang)為(wei)(wei)5.47萬(wan)粒/畝(mu)(mu)(mu)(mu)(mu)，并有(you)百(bai)叢幼蟲52頭(tou)(tou)(tou)，卵(luan)(luan)(luan)(luan)量(liang)(liang)接(jie)近去(qu)(qu)(qu)年(nian)(nian)，蟲量(liang)(liang)比(bi)(bi)去(qu)(qu)(qu)年(nian)(nian)減(jian)(jian)48%。當(dang)前田(tian)間蛾(e)、蟲卵(luan)(luan)(luan)(luan)量(liang)(liang)仍在增加，預(yu)計(ji)6月(yue)(yue)中下(xia)旬仍將有(you)稻(dao)縱(zong)(zong)卷(juan)葉螟遷入早(zao)稻(dao)。
白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱 白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱燈下(xia)初見早(zao)(zao)于(yu)去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)，遷入(ru)量(liang)(liang)接近去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)略低。白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱浙南(nan)燈下(xia)于(yu)5月(yue)(yue)(yue)4－11日(ri)(ri)(ri)(ri)(ri)初見，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)早(zao)(zao)5－18天(tian)(tian)。如溫州市站5月(yue)(yue)(yue)4日(ri)(ri)(ri)(ri)(ri)初見，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)5月(yue)(yue)(yue)22日(ri)(ri)(ri)(ri)(ri)早(zao)(zao)18天(tian)(tian)；松陽5月(yue)(yue)(yue)9日(ri)(ri)(ri)(ri)(ri)初見，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)5月(yue)(yue)(yue)20日(ri)(ri)(ri)(ri)(ri)早(zao)(zao)11天(tian)(tian)；天(tian)(tian)臺(tai)5月(yue)(yue)(yue)8日(ri)(ri)(ri)(ri)(ri)初見，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)5月(yue)(yue)(yue)23日(ri)(ri)(ri)(ri)(ri)早(zao)(zao)15天(tian)(tian)；東陽5月(yue)(yue)(yue)19日(ri)(ri)(ri)(ri)(ri)初見，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)5月(yue)(yue)(yue)24日(ri)(ri)(ri)(ri)(ri)早(zao)(zao)5天(tian)(tian)，比常(chang)年(nian)(nian)(nian)(nian)(nian)平均5月(yue)(yue)(yue)15日(ri)(ri)(ri)(ri)(ri)遲4天(tian)(tian)。初次(ci)遷入(ru)峰比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)遲2－6天(tian)(tian)，比常(chang)年(nian)(nian)(nian)(nian)(nian)早(zao)(zao)3－10天(tian)(tian)，分別于(yu)5月(yue)(yue)(yue)26－30日(ri)(ri)(ri)(ri)(ri)、6月(yue)(yue)(yue)8－12日(ri)(ri)(ri)(ri)(ri)出現二次(ci)遷入(ru)峰（去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)5月(yue)(yue)(yue)23－24日(ri)(ri)(ri)(ri)(ri)、5月(yue)(yue)(yue)27－28日(ri)(ri)(ri)(ri)(ri)、6月(yue)(yue)(yue)1－3日(ri)(ri)(ri)(ri)(ri)三次(ci)遷入(ru)峰），大(da)部分早(zao)(zao)稻區燈下(xia)累(lei)計蟲(chong)量(liang)(liang)比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)和常(chang)年(nian)(nian)(nian)(nian)(nian)同期增20%－20倍(bei)。據17個縣（市）病蟲(chong)測報(bao)站6月(yue)(yue)(yue)10－13日(ri)(ri)(ri)(ri)(ri)調查(cha)(cha)，大(da)部分早(zao)(zao)稻田(tian)白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱為(wei)(wei)73－200頭(tou)/百(bai)叢(cong)，幅度(du)為(wei)(wei)4－2476頭(tou)/百(bai)叢(cong)。蒼南(nan)站6月(yue)(yue)(yue)13日(ri)(ri)(ri)(ri)(ri)調查(cha)(cha)，白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱為(wei)(wei)209頭(tou)/ 百(bai)叢(cong)，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)同期減(jian)76%；溫嶺站6月(yue)(yue)(yue)10日(ri)(ri)(ri)(ri)(ri)調查(cha)(cha)，白(bai)(bai)(bai)(bai)背(bei)飛(fei)(fei)(fei)虱為(wei)(wei)230頭(tou)/ 百(bai)叢(cong)，比去(qu)(qu)年(nian)(nian)(nian)(nian)(nian)同期減(jian)5.7%,比常(chang)年(nian)(nian)(nian)(nian)(nian)增2.11倍(bei)。
褐飛虱 燈下(xia)于5月下(xia)旬至6月初初見，比(bi)去年略(lve)偏遲，比(bi)常年早(zao)4－10天，屬歷史早(zao)發年。
二化螟(ming) 據21個縣（市）病蟲(chong)測報站(zhan)(zhan)調(diao)查，平均一代二化螟(ming)畝(mu)殘蟲(chong)量(liang)為(wei)3268.8頭(tou)，幅度(du)為(wei)46－24728頭(tou)，地區(qu)(qu)間極不平衡，其中(zhong)有10個站(zhan)(zhan)比(bi)(bi)(bi)去年(nian)減(jian)(jian)(jian)少。蒼南站(zhan)(zhan)畝(mu)殘留(liu)蟲(chong)量(liang)1554頭(tou)，比(bi)(bi)(bi)去年(nian)增(zeng)87.91%；江(jiang)山站(zhan)(zhan)為(wei)畝(mu)殘留(liu)蟲(chong)量(liang)1800頭(tou)，比(bi)(bi)(bi)去年(nian)增(zeng)53%，比(bi)(bi)(bi)常(chang)年(nian)增(zeng)68.3%；衢(qu)江(jiang)站(zhan)(zhan)1630頭(tou)，比(bi)(bi)(bi)去年(nian)增(zeng)26.3%，比(bi)(bi)(bi)常(chang)年(nian)增(zeng)34.2%；溫嶺站(zhan)(zhan)為(wei)3072頭(tou)，比(bi)(bi)(bi)去年(nian)減(jian)(jian)(jian)28.2%，比(bi)(bi)(bi)常(chang)年(nian)增(zeng)1.84倍；臨海站(zhan)(zhan)為(wei)1650頭(tou)，比(bi)(bi)(bi)去年(nian)和(he)常(chang)年(nian)分(fen)別減(jian)(jian)(jian)29.8%和(he)21.4%。永康、婺城、東陽、松陽、紹(shao)興、象山、鄞州(zhou)等地比(bi)(bi)(bi)去年(nian)減(jian)(jian)(jian)20%－90%。據當(dang)前(qian)二化螟(ming)發育進度(du)調(diao)查，大部分(fen)稻區(qu)(qu)二代二化螟(ming)發生期比(bi)(bi)(bi)去年(nian)略(lve)偏早，預(yu)計二代蛾(e)高峰：浙南（溫州(zhou)、麗水）在(zai)6月下旬中(zhong)后期；浙中(zhong)（臺州(zhou)、金(jin)華、衢(qu)州(zhou)）在(zai)7月上旬；浙北在(zai)7月下旬。
紋(wen)枯(ku)病(bing)(bing)(bing)(bing) 浙南、浙中大部(bu)分(fen)稻(dao)(dao)區(qu)紋(wen)枯(ku)病(bing)(bing)(bing)(bing)在(zai)5月(yue)(yue)下(xia)旬(xun)至6月(yue)(yue)上旬(xun)初(chu)見(jian)，初(chu)見(jian)期(qi)比(bi)(bi)去(qu)年和常年略偏(pian)早。當前(qian)浙南溫州(zhou)、麗水、臺(tai)州(zhou)稻(dao)(dao)區(qu)病(bing)(bing)(bing)(bing)情比(bi)(bi)去(qu)年重，據6月(yue)(yue)10－13日調查(cha)，一般稻(dao)(dao)田(tian)叢(cong)(cong)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)10－20%，株(zhu)(zhu)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)5－12%，高的叢(cong)(cong)病(bing)(bing)(bing)(bing)率(lv)超(chao)過40%，株(zhu)(zhu)病(bing)(bing)(bing)(bing)率(lv)超(chao)過15%。如溫嶺6月(yue)(yue)10日調查(cha)，平均(jun)叢(cong)(cong)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)40.33%，株(zhu)(zhu)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)13%，分(fen)別比(bi)(bi)去(qu)年同(tong)(tong)期(qi)增83%和90%；江(jiang)山平均(jun)叢(cong)(cong)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)21.3%，株(zhu)(zhu)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)5.9%，比(bi)(bi)去(qu)年同(tong)(tong)期(qi)略減；東陽叢(cong)(cong)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)38.2%，株(zhu)(zhu)病(bing)(bing)(bing)(bing)率(lv)為(wei)(wei)7.2%，比(bi)(bi)去(qu)年同(tong)(tong)期(qi)增4.7倍和2.4倍。近(jin)期(qi)田(tian)間(jian)病(bing)(bing)(bing)(bing)情已(yi)進入激增期(qi)。
2．氣(qi)(qi)候(hou)(hou)因(yin)素(su)。目前(qian)(qian)我省已(yi)進入(ru)(ru)梅(mei)汛(xun)期，入(ru)(ru)梅(mei)時間(jian)早(zao)，溫度偏(pian)(pian)(pian)高(gao)(gao)，且今年(nian)梅(mei)雨(yu)量偏(pian)(pian)(pian)多(duo)(duo)是(shi)1999年(nian)以來梅(mei)雨(yu)呈(cheng)最多(duo)(duo)的一年(nian)。據(ju)省氣(qi)(qi)候(hou)(hou)中心(xin)未來30天(tian)(tian)（6月(yue)(yue)(yue)11日至7月(yue)(yue)(yue)10日）天(tian)(tian)氣(qi)(qi)趨勢(shi)預(yu)測，降水呈(cheng)前(qian)(qian)多(duo)(duo)后少(shao)趨勢(shi)，浙(zhe)中北(bei)部(bu)出梅(mei)將在(zai)7月(yue)(yue)(yue)上(shang)旬(xun)，浙(zhe)南雨(yu)季(ji)結(jie)束期將在(zai)6月(yue)(yue)(yue)底到7月(yue)(yue)(yue)初，均接(jie)(jie)近常(chang)(chang)年(nian)或(huo)略(lve)偏(pian)(pian)(pian)早(zao)。總降水量浙(zhe)中西(xi)部(bu)和(he)(he)浙(zhe)北(bei)地(di)(di)區(qu)(qu)接(jie)(jie)近常(chang)(chang)年(nian)或(huo)略(lve)偏(pian)(pian)(pian)多(duo)(duo)，其(qi)他(ta)地(di)(di)區(qu)(qu)比常(chang)(chang)年(nian)略(lve)偏(pian)(pian)(pian)少(shao)。6月(yue)(yue)(yue)中旬(xun)浙(zhe)中西(xi)部(bu)和(he)(he)浙(zhe)北(bei)地(di)(di)區(qu)(qu)略(lve)偏(pian)(pian)(pian)多(duo)(duo)。其(qi)他(ta)地(di)(di)區(qu)(qu)接(jie)(jie)近常(chang)(chang)年(nian)或(huo)略(lve)偏(pian)(pian)(pian)少(shao)；6月(yue)(yue)(yue)下旬(xun)浙(zhe)中西(xi)部(bu)和(he)(he)浙(zhe)北(bei)地(di)(di)區(qu)(qu)接(jie)(jie)近常(chang)(chang)年(nian)，其(qi)他(ta)地(di)(di)區(qu)(qu)略(lve)偏(pian)(pian)(pian)少(shao)；7月(yue)(yue)(yue)上(shang)旬(xun)全省大部(bu)比常(chang)(chang)年(nian)略(lve)偏(pian)(pian)(pian)少(shao)。氣(qi)(qi)溫全省接(jie)(jie)近常(chang)(chang)年(nian)或(huo)略(lve)偏(pian)(pian)(pian)高(gao)(gao)。6月(yue)(yue)(yue)中旬(xun)接(jie)(jie)近常(chang)(chang)年(nian)，6月(yue)(yue)(yue)下旬(xun)和(he)(he)7月(yue)(yue)(yue)上(shang)旬(xun)接(jie)(jie)近常(chang)(chang)年(nian)或(huo)略(lve)偏(pian)(pian)(pian)高(gao)(gao)；預(yu)計(ji)極端最高(gao)(gao)氣(qi)(qi)溫沿海(hai)地(di)(di)區(qu)(qu)31－33℃，其(qi)他(ta)地(di)(di)區(qu)(qu)34－36℃。上(shang)述氣(qi)(qi)候(hou)(hou)條件較(jiao)有(you)利于“兩遷”害(hai)(hai)蟲遷入(ru)(ru)和(he)(he)發(fa)生(sheng)(sheng)，以及紋(wen)枯病、稻瘟病等流行性病害(hai)(hai)的發(fa)生(sheng)(sheng)。
3．寄主條件。目前我省早稻已進入水稻生長中后期，植株抵抗力下降，田間郁閉程度提高。適溫高濕的田間小氣候，十分有利于紋枯病病情擴展和遷飛性害蟲繁衍危害。針對今年前期稻縱卷葉螟和白背飛虱遷入早、遷入量大，當前田間蟲量較常年偏高，以及我國南方“兩遷”蟲源地發生重，水稻“兩遷”害蟲仍將不斷遷入危害的特點，各地要切實加強以“兩遷”害蟲為重點的水稻重大病蟲監測預警，及時發布病蟲情報，科學指導防控工作。根據當地稻縱卷葉螟和白背飛虱發生實況，重點抓住縱卷葉螟和白背飛虱防治適期和早稻破口齊穗期防病的關鍵生育期，堅持“預防為主，綜合防治”，堅持主治與兼治相結合，在做好稻縱卷葉螟、白背飛虱防治同時，兼治二化螟、紋枯病和穗頸瘟，確保今年早稻豐收。
來源：浙江省植物保(bao)護檢疫局
