6月(yue)下旬以(yi)(yi)來，草地(di)螟越冬(dong)代成蟲在內(nei)蒙(meng)(meng)古(gu)中西部、河(he)北(bei)北(bei)部、山西北(bei)部、北(bei)京北(bei)部、遼寧西部燈下出現明顯蛾峰，局部地(di)區田(tian)間蛾量大，內(nei)蒙(meng)(meng)古(gu)巴彥淖爾(er)、赤(chi)峰和河(he)北(bei)張家口等地(di)局部田(tian)塊見一代蟲卵。以(yi)(yi)上見蟲區域近期均普遍降(jiang)雨，田(tian)間濕度(du)、溫度(du)和寄主條件明顯有利于草地(di)螟成蟲滯(zhi)留和種群繁殖，一代幼(you)蟲重發(fa)危害可能性大。
一、內(nei)蒙古中(zhong)西(xi)部及(ji)其(qi)周邊地區燈下(xia)出現蛾峰
6月(yue)(yue)20—27日(ri)(ri)(ri)，內(nei)蒙古(gu)巴彥淖(nao)爾市(shi)(shi)、鄂(e)爾多斯市(shi)(shi)、烏(wu)(wu)蘭察(cha)布市(shi)(shi)，河北張家(jia)口市(shi)(shi)，山(shan)西(xi)忻州市(shi)(shi)，北京延慶區燈(deng)下集中(zhong)見蟲，各地雌蛾(e)(e)卵(luan)巢發育級(ji)別(bie)差異大。高空測(ce)(ce)報(bao)燈(deng)監(jian)測(ce)(ce)，內(nei)蒙古(gu)烏(wu)(wu)拉(la)(la)(la)(la)特(te)(te)(te)中(zhong)旗(qi)(qi)、達(da)(da)拉(la)(la)(la)(la)特(te)(te)(te)旗(qi)(qi)、察(cha)右(you)前旗(qi)(qi)、興和(he)縣(xian)(xian)(xian)(xian)(xian)(xian)、豐(feng)鎮市(shi)(shi)、涼城縣(xian)(xian)(xian)(xian)(xian)(xian)，山(shan)西(xi)代縣(xian)(xian)(xian)(xian)(xian)(xian)，河北康(kang)保(bao)縣(xian)(xian)(xian)(xian)(xian)(xian)、萬(wan)(wan)(wan)(wan)全區，北京延慶區蛾(e)(e)盛期累(lei)(lei)計誘(you)蛾(e)(e)量(liang)(liang)(liang)為(wei)(wei)1.1萬(wan)(wan)(wan)(wan)—6.0萬(wan)(wan)(wan)(wan)頭(tou)；峰日(ri)(ri)(ri)蛾(e)(e)量(liang)(liang)(liang)，6月(yue)(yue)23日(ri)(ri)(ri)烏(wu)(wu)拉(la)(la)(la)(la)特(te)(te)(te)中(zhong)旗(qi)(qi)、達(da)(da)拉(la)(la)(la)(la)特(te)(te)(te)旗(qi)(qi)分別(bie)為(wei)(wei)9286頭(tou)、2.4萬(wan)(wan)(wan)(wan)頭(tou)，6月(yue)(yue)25日(ri)(ri)(ri)察(cha)右(you)前旗(qi)(qi)、康(kang)保(bao)縣(xian)(xian)(xian)(xian)(xian)(xian)分別(bie)為(wei)(wei)3.5萬(wan)(wan)(wan)(wan)頭(tou)、2.2萬(wan)(wan)(wan)(wan)頭(tou)，6月(yue)(yue)26日(ri)(ri)(ri)萬(wan)(wan)(wan)(wan)全區為(wei)(wei)1.9萬(wan)(wan)(wan)(wan)頭(tou)，三省其余(yu)各縣(xian)(xian)(xian)(xian)(xian)(xian)為(wei)(wei)701—6700頭(tou)，遼(liao)寧朝陽市(shi)(shi)6月(yue)(yue)25日(ri)(ri)(ri)為(wei)(wei)869頭(tou)（見表1）。常規測(ce)(ce)報(bao)燈(deng)監(jian)測(ce)(ce)，內(nei)蒙古(gu)臨河區、烏(wu)(wu)拉(la)(la)(la)(la)特(te)(te)(te)前旗(qi)(qi)、達(da)(da)拉(la)(la)(la)(la)特(te)(te)(te)旗(qi)(qi)、涼城縣(xian)(xian)(xian)(xian)(xian)(xian)，河北豐(feng)寧縣(xian)(xian)(xian)(xian)(xian)(xian)、康(kang)保(bao)縣(xian)(xian)(xian)(xian)(xian)(xian)、萬(wan)(wan)(wan)(wan)全區蛾(e)(e)盛期累(lei)(lei)計誘(you)蛾(e)(e)量(liang)(liang)(liang)為(wei)(wei)1300—1.0萬(wan)(wan)(wan)(wan)頭(tou)；峰日(ri)(ri)(ri)蛾(e)(e)量(liang)(liang)(liang)，6月(yue)(yue)20日(ri)(ri)(ri)豐(feng)寧縣(xian)(xian)(xian)(xian)(xian)(xian)為(wei)(wei)1686頭(tou)，6月(yue)(yue)25日(ri)(ri)(ri)臨河區、康(kang)保(bao)縣(xian)(xian)(xian)(xian)(xian)(xian)分別(bie)為(wei)(wei)4656頭(tou)、1718頭(tou)，6月(yue)(yue)26日(ri)(ri)(ri)萬(wan)(wan)(wan)(wan)全區為(wei)(wei)7328頭(tou)，內(nei)蒙古(gu)、河北其余(yu)各縣(xian)(xian)(xian)(xian)(xian)(xian)和(he)山(shan)西(xi)代縣(xian)(xian)(xian)(xian)(xian)(xian)為(wei)(wei)243—657頭(tou)（見表2）。
二、山西(xi)和河(he)北北部(bu)及內蒙古西(xi)部(bu)部(bu)分(fen)地區田間(jian)蛾量高
近期，內蒙(meng)(meng)古西(xi)部(bu)、河北(bei)和山西(xi)北(bei)部(bu)部(bu)分(fen)區(qu)(qu)域田(tian)(tian)間(jian)見成蟲(chong)，山西(xi)大同(tong)市(shi)陽高縣(xian)(xian)(xian)、天(tian)鎮(zhen)縣(xian)(xian)(xian)、渾源縣(xian)(xian)(xian)、新榮區(qu)(qu)、云州區(qu)(qu)、云岡區(qu)(qu)6個縣(xian)(xian)(xian)區(qu)(qu)草地(di)、林地(di)和農田(tian)(tian)分(fen)別發(fa)生(sheng)104萬(wan)(wan)畝、22.1萬(wan)(wan)畝和7.5萬(wan)(wan)畝，河北(bei)康保縣(xian)(xian)(xian)13個鄉鎮(zhen)農田(tian)(tian)發(fa)生(sheng)21萬(wan)(wan)畝。各地(di)調(diao)查百(bai)步(bu)驚(jing)蛾(e)量，山西(xi)天(tian)鎮(zhen)縣(xian)(xian)(xian)部(bu)分(fen)草灘(tan)最(zui)高達(da)上(shang)萬(wan)(wan)頭(tou)(tou)(tou)，陽高縣(xian)(xian)(xian)最(zui)高田(tian)(tian)塊(kuai)為1000頭(tou)(tou)(tou)；河北(bei)康保小麥(mai)、荒草田(tian)(tian)1000—2000頭(tou)(tou)(tou)，胡(hu)麻、小麥(mai)田(tian)(tian)500—1200頭(tou)(tou)(tou)，玉(yu)米、甜(tian)菜、藥材地(di)100—500頭(tou)(tou)(tou)；萬(wan)(wan)全區(qu)(qu)荒草地(di)百(bai)步(bu)驚(jing)蛾(e)2000—3000頭(tou)(tou)(tou)；內蒙(meng)(meng)古達(da)拉特旗苜蓿地(di)1500頭(tou)(tou)(tou)，玉(yu)米田(tian)(tian)地(di)頭(tou)(tou)(tou)為500頭(tou)(tou)(tou)；三(san)省(sheng)其他(ta)見蟲(chong)區(qu)(qu)為30—100頭(tou)(tou)(tou)。
三、內(nei)蒙古和河北局部區域田間查見蟲卵
近日，內蒙古巴彥淖爾、赤峰和河北張家口局部區域田間查見卵和幼蟲。其中，內蒙古赤峰市克什克騰旗一代幼蟲發生0.5萬畝，蟲口密度為15頭/m2；翁牛特旗發生1.5萬畝，蟲口密度為1頭/m2；巴彥淖爾市磴口縣發生0.03萬畝，蟲口密度為0.3頭/m2。河北康保縣屯墾鎮李占地村胡麻地、九棚村荒草地田間平均卵量分別為252粒/m2、305粒/m2，最高卵量達1675粒/m2、1890粒/m2，其他地區零星(xing)見卵。
四、華(hua)北(bei)和東(dong)北(bei)大部天氣(qi)條件有利，加強(qiang)一代幼蟲監測調查
近(jin)期和未(wei)來10天華北(bei)和東北(bei)降雨天氣多(duo)，雨量較常年(nian)同期明顯偏多(duo)，田(tian)間溫濕度條(tiao)(tiao)件適宜，有(you)利于(yu)當(dang)地草(cao)地螟成蟲滯留和種群繁殖(zhi)危(wei)害。鑒于(yu)本次草(cao)地螟見(jian)蟲區域(yu)廣、蛾量大，且(qie)天氣條(tiao)(tiao)件有(you)利，華北(bei)、西(xi)北(bei)和東北(bei)地區應加強燈下和田(tian)間成蟲發生情況監測調查，并在草(cao)地螟喜好寄主作物田(tian)開展卵量和幼蟲普查，及時組織和指導防治。
