山茱萸炭疽病发病规律和防治效果的研究

Studies on the Diseasing Regularity and Control of the Anthracnose of Japanesecornal Dogwood

1985～1988年在西峡县发现山茱萸的炭疽病菌主要以菌丝在僵果及果柄上越冬,1年生枝条上有潜伏侵染带菌现象.病菌可通过伤口侵入或直接侵入,潜育期3～4天.该菌从5月中旬到9月下旬均可侵染果实,侵染率与降雨量呈正相关;发病期与果实成熟度也有密切关系;发病程度与品种成熟期早晚及蛀果蛾的危害有关.室内药效测定表明,退菌特和拌种双抑菌效果最好.但田间药效试验结果以波尔多液效果最好,多菌灵、拌种双、退菌特等防效次之.

The pathogen of the anthracnose of Japanesecornal dogwood infects thefruit from the middle of May to the end of Sept.and passes the winter in dr-ying and rotting fruit and fruit stalks mainly by its hyphae.The germs latentdevelopment period lasts 3～4 days.A number of infected fruits are plusly corr-elatiye with precipitation.The diseasing time is closely related to fruit ripeness-and disease intensity is tightly relative with varieties and fruit borers.Fungici-de experiments show that Bordeaux mixture is the best one to control the disea-se.Carbendazol,Seadvox and Tuzet are also recommendable.