摘要
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(Peronosporaparasitica)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·锰锌可湿性粉剂500倍液有很好的防治效果。
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.
出处
《植物保护》
CAS
CSCD
北大核心
2005年第1期56-59,共4页
Plant Protection
关键词
植物病理学
西兰花花梗褐心病
寄生霜霉
防治
phytopathology
pedicle brown pith of brocooli
Peronospora parasitica
control
