八月份又是棗果白熟期,是炭疽病、褐斑病、suoguobingbingjundegaofajieduan,chulejishidependashajunyaotiqianyufangwai,ruofaxianleishibingjundezaoguo,yingjishidezhaichushenmai,yifangbingjunyiliuxianian,jixuweihaizaoguo。bayuefenyeshizaoxiubing(落葉病)的初發期,如發現葉片的背麵有黃色的小孢點,那就是棗鏽病的夏孢子堆病菌,要及時用新高脂膜800倍液噴施防治。
在(zai)防(fang)治(zhi)落(luo)葉(ye)病(bing)期(qi)間(jian),千(qian)萬(wan)不(bu)能(neng)澆(jiao)園(yuan)和(he)人(ren)不(bu)能(neng)在(zai)園(yuan)間(jian)來(lai)回(hui)穿(chuan)梭(suo),因(yin)為(wei)落(luo)葉(ye)病(bing)菌(jun)的(de)繁(fan)殖(zhi)靠(kao)的(de)就(jiu)是(shi)濕(shi)度(du),適(shi)宜(yi)的(de)溫(wen)度(du)和(he)濕(shi)度(du),更(geng)會(hui)加(jia)劇(ju)病(bing)菌(jun)的(de)繁(fan)殖(zhi),病(bing)菌(jun)的(de)傳(chuan)播(bo),主(zhu)要(yao)是(shi)靠(kao)風(feng)媒(mei)傳(chuan)播(bo)和(he)工(gong)作(zuo)人(ren)員(yuan)在(zai)田(tian)間(jian)勞(lao)動(dong)時(shi),帶(dai)動(dong)病(bing)菌(jun)的(de)傳(chuan)播(bo)。所(suo)以(yi)在(zai)防(fang)治(zhi)落(luo)葉(ye)病(bing)的(de)過(guo)程(cheng)中(zhong),稍(shao)有(you)一(yi)點(dian)疏(shu)忽(hu)大(da)意(yi),就(jiu)會(hui)造(zao)成(cheng)毀(hui)滅(mie)性(xing)的(de)後(hou)果(guo)。
八ba月yue中zhong下xia旬xun也ye是shi防fang裂lie果guo的de關guan鍵jian期qi,若ruo是shi棗zao園yuan未wei有you落luo葉ye病bing發fa生sheng的de,從cong白bai熟shu期qi就jiu應ying定ding期qi的de澆jiao灌guan,及ji時shi的de給gei棗zao果guo補bu充chong水shui分fen,提ti前qian加jia大da棗zao果guo體ti內nei的de含han水shui量liang,在zai雨yu季ji就jiu能neng有you效xiao的de減jian輕qing裂lie果guo現xian象xiang。
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