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象山县大棚栽培草莓已有 10余年历史 ,常年种植面积约 333 3ｈｍ2 ,由于连年种植 ,草莓白粉病逐年加重 ,已成为常发性病害。草莓发生白粉病后 ,一般减收 2 0 %～ 30 % ,重的达 5 0 %以上 ,甚至绝收 ,严重影响草莓的产量和品质。1 发病特点与消长规律草莓白粉病的病原为Ｓｐｈ?
Xiangshan County greenhouse cultivation of strawberry has more than 10 years of history, perennial planting area of about 333 3hm2, due to successive years of planting, strawberry powdery mildew year by year, has become a common disease. Strawberry powdery mildew, the general reduction of 20% to 30%, weighing up to 50% or more, or even absolutely affect the yield and quality of strawberries. 1 incidence characteristics and growth and decline of strawberry powdery mildew pathogen Sph?