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有些地区用“异稻瘟净”兼治稻纹枯病效果甚微,到底是药剂本身的问题?还是病菌产生了抗性?为此,我们在实验室用混有和不混有“异稻瘟净”的培养基对纹枯病菌进行了分离培养试验;同时进行了盆栽和大田人工接种及其药效验证。 1.纹枯病菌“抗性菌株”的收集和分离培养: 从纹枯病防效较差的田间收集病叶,用组织分离法将十个病斑单独分别同时培养在“马基”~*(下同)和“净基”~**(下同)两种培养基上,并编号,观察:结果见表一。
In some areas, the use of “different blast of rice blast” and rice sheath blight effect is minimal, in the end is the agent itself? Or bacteria have resistance? To this end, we used in the laboratory with and without mixed with “different blast Net ”of the Rhizoctonia solanacearum culture medium were isolated and tested; the same time, artificial inoculation of potted and field and its efficacy verification. 1. Collection and isolation and culture of “Rhizoctonia solani” “resistant strains”: The diseased leaves were collected from fields with poor control of sheath blight disease, and ten spots were separately cultured simultaneously in “Markey” * (The same below) and “net” ~ ** (the same below) two kinds of medium, and number, observe: the results in Table 1.