Commercial biocontrol of microbial plant diseases and plant pests, such as nematodes, requires field-effective formulations. The isolate Pseudomonas chlororaphis O6 is a Gram-negative bacterium that controls microbial plant pathogens both directly and indirectly. This bacterium also has nematocidal activity. In this study, we report on the efficacy of a wettable powder-type formulation of P. chlororaphis O6. Culturable bacteria in the formulated product were retained at above 1 × 10⁸ colony forming units/g after storage of the powder at 25 °C for six months. Foliar application of the diluted formulated product controlled leaf blight and gray mold in tomato. The product also displayed preventative and curative controls for root-knot nematode (Meloidogyne spp.) in tomato. Under laboratory conditions and for commercially grown melon, the control was at levels comparable to that of a standard commercial chemical nematicide. The results indicated that the wettable powder formulation product of P. chlororaphis O6 can be used for control of plant microbial pathogens and root-knot nematodes.

中文翻译：

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配制的绿假单胞菌O6对植物病害和根结线虫的生物防治功效。

微生物植物病害和植物害虫（例如线虫）的商业生物防治需要现场有效的制剂。分离株Pseudomonas chlororaphis O6是革兰氏阴性细菌，可直接和间接控制微生物植物病原体。该细菌还具有杀线虫活性。在这项研究中，我们报告了P. chlororaphis O6的可湿性粉剂配方的功效。将粉末在25°C储存六个月后，配制产品中的可培养细菌以1×10 ^8个菌落形成单位/ g保留。稀释制剂的叶面施用可控制番茄的叶枯病和灰霉病。该产品还展示了根结线虫（番茄中的Meloidogyne spp。）。在实验室条件下，对于商业种植的甜瓜，其控制水平可与标准商业化学杀线虫剂相比。结果表明，P。chlororaphis O6的可湿性粉剂产品可用于控制植物微生物病原体和根结线虫。