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早防越冬茬蔬菜早衰

發(fā)布時(shí)間：

2023-02-21

　　目前越冬茬蔬菜已進(jìn)入生長(cháng)后期，不少植株開(kāi)始出現早衰癥狀，應及早采取措施預防。

　　摘除老葉和病葉及時(shí)摘除老葉、病葉和枯葉，能減少植株營(yíng)養消耗，控制病害傳播和蔓延，有利于田間通風(fēng)透光，促進(jìn)植株健壯生長(cháng)。

　　及早采收，及時(shí)施肥及早采收可以減少養分消耗，防止植株早衰。及時(shí)施肥可以為植株生長(cháng)發(fā)育提供充足的養分，是防止植株早衰的關(guān)鍵措施。施肥的最佳時(shí)期是果實(shí)采收后，結合灌水施腐熟人糞尿或氮磷肥1～2次。黃瓜每畝施磷酸二銨10公斤，茄子每畝施尿素10公斤，辣椒每畝施磷酸二銨12公斤。

　　嚴防病蟲(chóng)

　　對黃瓜白粉病，可用50％甲基硫菌靈可濕性粉劑800～1000倍液或25%三唑酮可濕性粉劑1200倍液噴霧防治。對黃瓜霜霉病，可用40%三乙膦酸鋁可濕性粉劑300～400倍液噴霧防治。防治番茄灰霉病，可用75%百菌清可濕性粉劑600～800倍液噴霧。防治茄子綿疫病，可在發(fā)病初期用75%百菌清可濕性粉劑700倍液或50%克菌丹可濕性粉劑500倍液噴霧，每隔7～10天一次，連續防治3～4次。

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