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春蘿卜幼苗期及早防治白粉病

發(fā)布時(shí)間：2015-04-02 04:33:12 來(lái)源：農(nóng)民日?qǐng)?bào) 作者：佚名責(zé)任編輯：羅伯特

　　春蘿卜幼苗期葉片幼嫩，很容易感染白粉病，在葉片上布滿白色粉狀物后，葉片失綠黃化，嚴(yán)重時(shí)生長(zhǎng)點(diǎn)萎縮，不長(zhǎng)新葉，影響地下根伸長(zhǎng)膨大。

　　必須每10~15天葉面噴灑一次1000倍50%腈菌唑水溶液，或1000倍50%三唑酮水溶液，或1000倍50%硫懸浮劑水溶液，或1000倍50%醚菌脂水溶液進(jìn)行防治，連續(xù)噴灑2~3次，均勻噴濕所有的葉片，以開(kāi)始有水珠往下滴為宜。石華

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