2,4-二乙酰基藤黄酚产生菌在番茄根部的定殖及对番茄青枯病的防治

2，4-二乙酰基藤黄酚(2，4-DAPG)产生菌是荧光菌对土传病害进行生物防治的主要类群之一。室内筛选结果表明：供试的12个2，4-DAPG产生菌菌株对番茄青枯病菌均有不同程度的抑制作用，其中CPF、10抑菌效果最佳，抑菌带宽为3．5mm；而2P24、5J10次之，抑菌带宽为3．0mm。CPF10和2P24培养原液对番茄胚根的生长均有明显的抑制作用。CPF10和2P24根部定殖结果表明，两菌株均可在番茄幼苗根部大量定殖，根表细菌数量随着时间延长呈下降趋势但仍维持较高数量；而根内细菌数量有明显上升的趋势。CPF10和2P24对番茄青枯病均有一定的防治效果，其中2P24的防治效果最好。而CPF10在所有的处理中变异系数(CV)最小，防治效果最稳定。

Preliminary Exploration of Bacteria That Produce 2,4 - DAPG Colonize the Rhizoplance and Controll the Tomato Southern Bacterial Wilt

Preliminary exploration of the bacteria that produce 2,4-DAPG colonize the rhizoplane and control tomato southern bacterial wilt, it is known that 12 offering stains had different effect on pathogentic bacterium, CPF10 was the best among all treatments in controlling the pathogenic bacterium. Fermented broths of strains CPF10 and 2P24 had considerable influence with vigor of tomato seed germination and growth of corcule ,culture stock of strain CPF10 affected them deep. Bacteria strains 2P24 and CPF10 colonized the rhizoplane. In greenhouse experiments, 2P24 was the best among all treatments in controlling the disease, while variation coefficient of CPF10 was the smallest in all the treatments, so controlling effect of CPF10 was the most stable.