STUDIES OF INTERRELATION OF PEACH FRUIT DISEASES AND THEIR INTEGRATED MANAGEMENT

This paper reports the effects of incidence and severity of peach scab (Cladosporium carpophilum Thüm.) on peach brown rot (Monilia spp.) and postharvest rot of peach fruits (caused by Rhizopus spp.), and their integrated management in Yunnan. The results show that the scab is one of the important predisposing factors of the brown rot and postharvest rot of the fruity The fruits infected by C. car pophilum frequently split so that the pathogens (Monilia spp., Rhizopus spp. etc.) can easily penetrate through the splits. In one peach orchard, the fruits infected by Monilia sp. through the splits were about 50% of the total number of the brown rot fruits. Peach fruits infected by scab will readily rot because of the infection of such rot fungi as Rhizopus spp. after harvesting. The integrated management of peach scab, brown rot and other diseases has got a better result by means of the cultural and chemical control of the diseases. The control effect of the peach scab was 77.8%, the brown rot and other diseases were suppressed to some extent, and the output of the peach fruits increased to a certain degree as well.