桂林地区葡萄溃疡病菌分生孢子田间扩散动态研究

Diffusion dynamic of Lasiodiplodia theobromae conidia causing grapevine canker in Guilin area

[目的]明确桂林地区葡萄溃疡病菌分生孢子田间消长规律,为当地制定葡萄溃疡病防控策略提供科学依据。[方法]采用玻片黏着法对桂林地区葡萄园内葡萄溃疡病菌（可可毛色二孢L.theobromae）分生孢子的扩散动态进行监测,并分析其与葡萄物候期及气象因子的关系。[结果]桂林地区葡萄溃疡病菌分生孢子从5月上旬开始出现,6月下旬~7月中旬进入高峰期,7月下旬~8月底期间分生孢子种群数量迅速下降,9月底后完全捕捉不到分生孢子。葡萄溃疡病菌分生孢子的消长与葡萄物候期、降雨量及温度有紧密关系。[结论]桂林地区葡萄溃疡病菌分生孢子田间发生期为5~9月,5月上旬为当地初次防治葡萄溃疡病的关键时期。

[Objective ]The growth and decline rule of of Lasiodiplodia theobromae conidia causing grapevine canker was investigated in Guilin area, in order to provide scientific basis for making control strategy of grapevine canker. [Method]The slide adhesion method was used to monitor diffusion dynamic of L. theobromae conidia in vineyard of Guilin area. And the relationships between diffusion dynamic of conidia and both phenophase of grapevine and meteorological factors were analyzed, respectively. [Result]The results showed that L. theobromae conidia began to appear in early May in Guilin area, and its epidemic peak period was from later June to middle July, while the population quantity of L. theo- bromae conidia declined quickly from later July to later August, and the L. theobromae conidia could not be captured at all after later September. In addition, the growth and decline of L. theobromae conidia was closely related to grapevine phenophase, rainfall and temperature. [Conclusion]The emergence period of L. theobromae conidia in vineyard of Guilin area is from May to September, and the key period of initial control for grapevine canker is in early May in Guilin area.