板栗干腐病研究之三——病原物的侵染特点

Researches on the Drg Rot of Chestnuts in Ⅲ—The Infection Features of Pathogens.

采用对板栗结果枝实行分期套袋、人工接种、以及药剂防治等方法,以分析观察板栗果仁干腐病的侵染时期和发病规律。结果表明,干腐病是由多种弱寄生和腐生真菌引起的一种贮藏期复合病害。病原物于开花期经由花器侵入幼果,呈潜伏状态,直到果实成熟不表现症状。等到采收后,在加工干燥和运输贮藏过程中开始发病出现多种干腐症状,病势随贮藏期果仁水分的丧失而迅速发展,最后引至大量果仁腐败变质。以上结果对于控制病害有一定启示。

By sheath on the fruiting branches with paper bag, inoculetion with pathogens isolated from diseased seeds and protection with fungicides in floweaing, havesting and storage periods for stredudiexg the infection features of pathogens inducing dry rot of chesnuts. All the result of three experimente sugested that the dry rot were cacesed by a number of diffent weak pathogens or saprophytic fung; in cooporations. Pathoses begining to infection during in flower- ing and byway of the stigma in to inmature secds, then latent there untill the fruits ripen. The symptoms developed gredually after harvested and in storage, particularly when the water conteoct of seeds decrcasing dramatkolly, at lest a lot of seeds wece decay and lost commorcial quality. These results may show us some inspiration in cortrolling the disease.