Study on pedicle brown pith of broccoli
2005
Wang Guoliang, Li guolei, Wu Minghua
chinois. 西兰花花梗褐心病的主要症状为病花梗表面和内部有小褐斑，髓部水渍状并可扩展到花球主轴髓部，花球中部分花梗和花蕾的发育受阻。病花球保湿2～3d后，其切口可形成大量白色霜霉状物。经鉴定，该病害是由寄生霜霉_(Peronospora parasitica)_引起的新症状，病菌主要在幼蕾期侵染。在西兰花幼蕾期喷施58%甲霜and#8226;锰锌可湿性粉剂500倍液有很好的防治效果.
Afficher plus [+] Moins [-]anglais. Symptoms of pedicle brown pith of broccoli were some pedicles and buds stunting, small brown spots on surface and inner and water_soaked in pith of the pedicle. In mist chamber, after 2～3 d, mass downy growth of the sporophores of the fungus appears on the wound of the diseased pedicle. Experiment showed that the new symptom was caused by _Peronospora parasitica._ The infection main occurred in young flower ball period. A good prevention and cure result could gain by spraying 500 times 58% ridomil_MZ in the young flower ball period.
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