症狀:
番fan茄qie灰hui葉ye斑ban病bing隻zhi為wei害hai葉ye片pian,發fa病bing初chu期qi葉ye麵mian布bu滿man暗an綠lv色se圓yuan形xing或huo近jin圓yuan形xing小xiao斑ban點dian,後hou沿yan葉ye麵mian向xiang四si周zhou擴kuo大da,呈cheng不bu規gui則ze形xing,中zhong部bu逐zhu漸jian褪tui綠lv,變bian為wei灰hui白bai色se至zhi灰hui褐he色se。病bing斑ban稍shao凹ao陷xian,直zhi徑jing 2~4毫米,極薄,後期易破裂、穿孔。
發病規律:
bingjunkesuibingcantizaiturangzhonghuozhongzishangqianfu。wenshidushiyishichanshengfenshengbaozijinxingchuqinran,wennuanchaoshideyinyutianjijieluchixushijianchangshifabingdezhongyaotiaojian。yibanturangfeilibuzu,zhizhushengchangshuairuohuodanfeiguoduo,zhizhutuchangdeqingkuangxiafabingzhong。
防治方法:
1.農業措施
選用抗病品種。加強管理,增施有機肥及磷鉀肥。噴灑葉麵肥,增強植株抗病力。消滅侵染源,收獲後及時清除病殘體,集中焚燒。
2.藥劑防治
發病初期噴灑75%百菌清可濕性粉劑600倍液,或40%克菌丹可濕性粉劑500倍液,或77%可殺得可濕性粉劑400~500倍液,或500混殺硫懸浮劑500倍液,隔7天左右1次,連噴2~3次。
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