並列摘要
Scab on Japanese apricot, caused by Cladosporium carpophilum ( teleomorph: Venturia carpophila), is the most serious disease of Japanese apricot fruits in Taiwan. Bagging treatment of Japanese apricot fruits indicated that the period of young fruits within one month age after tree blossom was the most important for invasion of the pathogen. Futhermore, it was also the most suitable period for spraying fungicides to control the disease in this island. In field trials, the spray of 25% bitertanol (5000 X) mixed with summer oil (90 X) one week before tree blossom and then continuous two-time sprays of 25% bitertanol (5000 X) for younger fruits once per 15-20 days reduced significantly disease severity of Japanese apricot scab and increased fruit yields.