危害秋蘑菇的“三蟲一病”是:蟎蟲、跳蟲、菇蚊和有害疣孢黴。現將這些病蟲害為害特點與防治方法敘述如下。
一、蟎蟲為害症狀
發(fa)菌(jun)過(guo)程(cheng)中(zhong),如(ru)發(fa)現(xian)菌(jun)絲(si)有(you)退(tui)菌(jun)現(xian)象(xiang),如(ru)絨(rong)毛(mao)狀(zhuang)菌(jun)絲(si)減(jian)少(shao),索(suo)性(xing)菌(jun)絲(si)增(zeng)多(duo),菌(jun)絲(si)表(biao)層(ceng)見(jian)到(dao)有(you)粉(fen)紅(hong)色(se)發(fa)亮(liang)點(dian),則(ze)為(wei)菇(gu)床(chuang)出(chu)現(xian)蟎(man)頭(tou)。當(dang)用(yong)放(fang)大(da)鏡(jing)所(suo)看(kan)到(dao)的(de)範(fan)圍(wei)內(nei)存(cun)在(zai)3~5隻zhi蟎man蟲chong時shi,即ji達da到dao防fang治zhi指zhi標biao。覆fu土tu後hou蟎man蟲chong會hui隨sui著zhe菌jun絲si向xiang土tu麵mian生sheng長chang而er和he土tu麵mian移yi動dong,集ji中zhong於yu原yuan基ji和he菇gu柄bing基ji部bu取qu食shi,常chang造zao成cheng根gen部bu光guang禿tu,無wu菌jun根gen,營ying養yang無wu法fa輸shu送song而er萎wei縮suo致zhi死si。同tong時shi蟎man蟲chong傳chuan播bo病bing菌jun和he病bing毒du,蟎man蟲chong嚴yan重zhong的de菇gu房fang,各ge種zhong病bing害hai也ye較jiao嚴yan重zhong。
二、跳蟲為害症狀
tiaochongshizashixingkunchong,zaidatianhedapengneizhongzhimogu,tiaochongjiaoduo。changjiandezhongleiyouhuibaisedejiaotiaochonghetixingweixiaodeheijiaotiaochong。tiaochongjiqushijunsiyequshiguti,changqunjiyujunzheneihuogugaishang,jianggutiyaoniechengqianchuangbaikong,zaochenggutigansuosiwang。youqishiheijiaotiaochong,chongzitixiwei,chongkoumiduda,jiyizaochenghuimiexingzaihai。
三、菇蚊為害症狀
qiujiwenduzhujianjiangdi,jiaoweishiheguwenheguyingfanzhi,youqizaifenfeifengfuhefajiaobuchedidepeiyangliaonei,guwenheguyingshuliangpangda,yiyouchongqushijunsi。jiangdichanliang,ruguwenbaofa,quntishuliangguoda,yekeyinqihuimiexingzaihai。
四、有害疣飽黴症狀
danggujunsizaituzhongchuyujunsuxingchengqi,yuanjifenhuaqihezishitishengchangqijianjunkebeiyouhaiyoubaomeiqinranweihai。gutibeihaihoubiaoxianjixing,gubingpengda,gugaibianxiao,bingfuyoubaiserongmaozhuangjunsi,houbianhe,chanshengheseyehuobingban,gutibeihaihouchanlianghezhiliangdouzaoshouhendasunshi。
五、病蟲害綜合防治
在發菌中後期,培養料中蟲口密度達到防止指標時,需及時用藥防治,用藥種類應選用高效底毒、對菌絲和菇體無傷害的農藥。菇房條件好,密封性強,可用磷化鋁熏蒸,每立方米3片(9.9克)密閉48小(xiao)時(shi)。大(da)多(duo)數(shu)菇(gu)房(fang)或(huo)棚(peng)地(di)栽(zai)培(pei)的(de)場(chang)所(suo)隻(zhi)能(neng)采(cai)用(yong)藥(yao)劑(ji)噴(pen)霧(wu)防(fang)治(zhi),菇(gu)蟲(chong)淨(jing)是(shi)專(zhuan)用(yong)於(yu)食(shi)用(yong)菌(jun)殺(sha)蟲(chong)殺(sha)蟎(man)的(de)生(sheng)物(wu)型(xing)藥(yao)劑(ji),具(ju)有(you)內(nei)吸(xi)和(he)胃(wei)毒(du)作(zuo)用(yong),在(zai)蟲(chong)口(kou)密(mi)度(du)大(da)時(shi),用(yong)500倍噴霧;在覆土期發生蟲害,可在覆土後結合重施調菇水時,在水中配入1000倍菇蟲淨;農第一潮菇生長期發生蟲害,應在第一潮菇的高峰期過後,用菇蟲淨防治。用藥前視菇房濕度停止澆水1~2天,使藥劑能更快地吸收到菌床的深度,達到明顯的殺蟲效果。
當菇床上出現被疣孢黴侵染的病菇後,應停止噴水2~3天,保持床麵幹燥,及時摘除病菇並燒毀,待這潮菇過後,立即噴1000倍的多菇豐殺菌劑,結合補水,隔3天噴1次,連噴3次,可有效地控製土層內的病菌蔓延,同時注意控製空氣濕度,加強通風。
在氣溫偏高的8月(yue)份(fen),菇(gu)床(chuang)內(nei)潛(qian)伏(fu)著(zhe)較(jiao)多(duo)的(de)病(bing)蟲(chong)菌(jun)源(yuan),當(dang)出(chu)過(guo)二(er)潮(chao)菇(gu)後(hou),遇(yu)到(dao)較(jiao)高(gao)的(de)溫(wen)度(du)時(shi),病(bing)害(hai)和(he)蟲(chong)害(hai)常(chang)常(chang)爆(bao)發(fa),防(fang)治(zhi)時(shi)可(ke)將(jiang)殺(sha)蟲(chong)劑(ji)和(he)殺(sha)菌(jun)劑(ji)同(tong)時(shi)混(hun)合(he)後(hou)噴(pen)施(shi),達(da)到(dao)雙(shuang)管(guan)齊(qi)下(xia)的(de)效(xiao)果(guo)。
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