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采用室内分离培养与田间调查相结合的方法,对金丝小枣浆烂果病(ZiziphusjujubaMill.cv.Jinsixiaozao)的侵染循环进行了研究,结果表明:金丝小枣浆烂果病病原菌囊孢壳菌Physalosporaobtuse(Schw.)可在金丝小枣树体及病残体和枣园周围的杨树、榆树、刺槐树、桃树、苹果、梨树上越冬。5月下旬—9月中旬分生孢子器形成并散发分生孢子,8月中、下旬子囊孢子和分生孢子同时散发。囊孢壳菌孢子随风、雨传播,通过伤口和气孔侵入。6月上旬囊孢壳菌开始侵染枣吊、果柄,7月上旬开始侵染枣果,8月下旬为囊孢壳菌对枣果的侵染高峰期。囊孢壳菌在当年发病枣果上只形成无性世代的分生孢子器,8月下旬—9月散发分生孢子,可在田间进行再侵染。
The infection cycle of Ziziphus jujuba Mill.cv. Jinsixiaozao was studied by the method of indoor separation and field investigation. The results showed that the pathogen of the rot of gold jujube pulp Physalospora obtus (Schw.) Can survive overwintering poplar, elm, acacia, peach, apple and pear trees around the jujube tree body and diseased body and jujube garden. From late May to mid-September, the conidia form and disseminate conidia. In mid-August, ascospores and conidia disperse simultaneously. Bacillus sporulation spores wind, rain spread through the wounds and stomatal invasion. In early June, Cystosporium began to infect Zizyphus jujube and fruit stalk. Zizyphus jujuba began to be invaded in early July, and the peak period of infection by Cystosporium to Ziziphus arugu was in late August. In the same year, the incidence of Apis cerasitus jujube on the formation of only asexual conidia, from late August to September disseminated conidia, re-infection in the field.