黃瓜拔園時一定要帶出根,若除根不徹底,很容易留下禍根,為以後病害的傳播埋下隱患。除根不淨弊端有二:
一yi是shi容rong易yi留liu下xia病bing菌jun黃huang瓜gua植zhi株zhu中zhong不bu少shao患huan有you根gen部bu病bing害hai,若ruo根gen係xi拔ba除chu不bu徹che底di,病bing原yuan菌jun會hui繼ji續xu滯zhi留liu在zai土tu壤rang中zhong,危wei害hai下xia茬cha蔬shu菜cai。因yin此ci,黃huang瓜gua拔ba園yuan時shi一yi定ding要yao將jiang根gen係xi全quan部bu拔ba出chu來lai,若ruo土tu壤rang較jiao幹gan,可ke在zai拔ba園yuan前qian輕qing澆jiao一yi水shui,將jiang土tu壤rang濕shi潤run。必bi要yao時shi可ke采cai取qu挖wa除chu,以yi免mian須xu根gen斷duan留liu在zai土tu壤rang中zhong。
另外,在拔園前最好有病株的地方做好標記,拔園後將病穴用生石灰或藥液重點處理一下,以徹底消滅病菌。
ershirongyijianggenxishangdegenjiexianchongliuzaiturangzhongyougenjiexianchongdepengshi,daliangdegenjiexianchonghuifudaizaihuangguagenxishang,ruobagenbuchedi,huijixuliuzaiturangzhong,weihaixiachashucai。yinwei,huangguabayuanshizhengshixiaomiegenjiexianchongdedahaoshiji,keliyongcijihuijiangfuzaigenxishangdegenjiexianchongchedidaichulai。
為此,黃瓜拔園時除根一定要幹淨徹底。
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