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报道了嗜线虫致病杆菌发酵液对马铃薯晚疫病的平板抑制作用以及对离体叶片和盆载植株的防病效果。嗜线虫致病杆菌发酵液对致病疫霉菌丝生长有强烈的抑制作用 ,5 0～ 12mL·L-1发酵液能完全抑制疫霉菌丝的生长 ;10 0～ 5 0mL·L-1发酵液对离体马铃薯叶片晚疫病的发病和病害发展有较强的控制作用 ,其病害控制率分别达 10 0 %和 93.0 8% ;在盆载试验中 ,5 0mL·L-1的发酵液作为保护剂对晚疫病害控制率平均达 75 .9% ,与 2 0mL·L-1的 2 5 %甲霜灵效果差异不显著 (P =0 .0 5 ) ,作为治疗剂对病害的控制率达 5 2 .4% ,当低剂量的甲霜灵与发酵液混合时 ,其防病效果相当于二者单独使用的效果 ,说明发酵液与甲霜灵之间有增效作用。
The inhibitory effect of nematode-induced pathogenic bacillus fermentation broth on potato late blight and its preventive effect on isolated leaves and potted plants were reported. Nematocidal pathogenic bacteria fermentation broth on Phytophthora infestans mycelial growth has a strong inhibitory effect, 50 ~ 12mL · L-1 fermentation liquid can completely inhibit the growth of Phytophthora capsici; 10 0 ~ 50mL·L-1 fermentation broth The control effect on the incidence and disease development of late blight in potato leaves was strong, and the disease control rates were 100% and 93.0% respectively. In the pot experiment, 50ml·L-1 fermentation broth was used as protection The average rate of control for late blight disease was 75.9%, which was not significantly different from that of 25% Metalaxyl 20 mmol·L-1 (P = 0.05). The rate of disease control as a therapeutic agent was up to 5 2 .4%, when the low dose of metalaxyl mixed with the fermentation broth, its disease control effect is equivalent to the effect of the two alone, indicating that there is a synergistic effect between the fermentation broth and metalaxyl.