伽师县甜瓜主要流行性病害发生与分析

ANALYSIS ON OCCURRENCE OF MAIN DISEASES OF MELON IN JIASHI

1996～ 1999年对伽师县甜瓜霜霉病和白粉病发生和流行因素进行了研究。证实了甜瓜霜霉病初侵染源为有霜霉病发生的黄瓜温室大棚。 6月至 8月上旬降雨量和降雨日数是甜瓜霜霉病流行的关键条件 ;当前生产中的甜瓜主栽品种均不抗霜霉病 ;甜瓜成熟期最易感染霜霉病和白粉病 ,其次是果实膨大期。

Epidemic factors of downy mildew and powdery mildew in melon were studied in JIASHI during 1996~1999.It was confirmed that the greenhouses in which downy mildew occured in cucumber was primary cource of downy mildew of melon.The key factors influencing epidemic of downy mildew of melon in JIASHI were rainy days and rainfall from June first to August tenth.Melon culticars in JIASHI were susceptible.Fruitmaturtion period of melon to downy mildew and powdery mildew was the best susceptible.Fruit-formation period was alse susceptible.(Abstract)