上海地区十字花科蔬菜根肿病防控技术研究

Control techniques for cruciferous clubroot in Shanghai

通过在上海地区主要的十字花科种植区域进行调查,发现闵行区、浦东区是上海地区根肿病发病最为严重的两个地区,2012年、2013年2年平均发病率分别为62%和42%。。上海地区根肿病发病呈现出区域交界处发病高,区域内部发病率相对较低的特点。生理小种鉴定结果显示,上海地区根肿病菌以7号生理小种为主,同时还有2号、5号生理小种,且同一地区存在多种生理小种,且分布复杂。田间防治试验表明,化学农药氰霜唑、生物农药XF-1(Bacillus subtilis XF-1)和生物农药T4(Trichoderma harzianum T4)对根肿病防治有良好的效果,单独使用防治效果分别达到57.8%、51.1%和43.3%。而氰霜唑与生物农药XF-1以及氰霜唑与生物农药T4复合使用时,其对根肿病的防治效果可分别达到70.1%、65.3%,防治效果显著。

According to the investigation of brassica clubroot distribution and severity in Shanghai, Minhang district and Pudong district were the most serious area that brassica clubroot occurred, with the average incidence 62% and 42% respectively in 2012 and 2013. The incidence of clubroot was obviously higher at the junction of different district than at the region inside. Identification results of physiological races suggested that NO. 7 was the most dominate physiological race in Shanghai more than one kind of physiological race were , and physiological race NO. 2 and NO. 5 also existed, meantime, found in same area and their distributions were also complicated. In field trials, cyazofamid, biofungicide XF-1 （ Bacillus subtilis XF-1 ） and biofungicide T4 （ Trichoderma harzia- hum T4） had the control effects of 57.8 %, 51.1%, 43.3 % on clubroot, respectively. However, the control effi- ciency would be remarkably increased when combination application of cyazofamid with XF-1 （70.1% ） or with T4 （65.3 % ） （ Trichoderma harzianum T4）.