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采用下列两种作物病害,在盆栽植株上或田间植物上用各种不同方法进行试验,比较苯来特和多菌灵两种内吸杀菌剂的各种防病作用的效果:(1)水稻纹枯病菌(Pelliculariasa-sakii);(2)花生叶斑病菌(Cercospora personata和C.arachidicola);并用水稻纹枯病菌和香蕉炭疽病菌(Gloeosporium musarum)分别用生长速率测定法和抑制圈法比较此两种化合物的杀菌毒力。除花生叶斑病在田间的试验采用药剂的重量作标准外,其他在用盆栽植物进行的试验中均采用克分子数作为标准进行比较。 各种不同试验的结果一致表明,苯来特的毒力和防病效果,都比多菌灵大,特别是在用同样的克分子数的毒效作为比较标准时,差异更为明显。用生长速率和抑制圈方法分别测定药剂对水稻纹枯病菌和香蕉炭疽病菌的结果说明,苯来特比多菌灵的毒力分别大1.37～1.66倍和5.04～10.22％。这两种药剂存在这种差别,看来与苯来特的分解产物中除MBC(即多菌灵)外,还有异氰酸丁酯这个事实有关。 苯来特和多菌灵的毒力,在不同品种的水稻上的反应有些不同,主要表现在药剂对植株的保护作用。在红梅早上,两者的差别很小,在二九矮上没有区别,而在珍珠矮上则差别显著。
The effects of various anti-pathogenic effects of the two systemic fungicides of beneite and carbendazim were compared using either of the following two crop diseases on potted plants or in field plants using various methods: (1) rice Rhizoctonia solani (Pelliculariasa-sakii); (2) Cercospora personata and C.arachidicola; and using the test of Rhizoctonia solani and Gloeosporium musarum, The bactericidal toxicity of these two compounds was compared. In addition to peanut leaf spot in the field test using the weight of the drug as a standard, the other tests carried out in potted plants are used as the standard molar number compared. The results of various trials have consistently shown that the toxicity and anti-disease effects of benezene are greater than carbendazim, especially when the same mole number of toxic effects as the comparative standard, the difference is even more obvious. The results of growth rate and inhibition zone method for the determination of Rhizoctonia solani and Banana anthracnose showed that the toxicity of carbendazim was 1.37-1.66 and 5.04-10.22%, respectively. The difference between the two agents appears to be related to the fact that there is butyl isocyanate in addition to MBC (ie carbendazim) in the decomposition products of Benzene. Benzene and carbendazim toxicity, the response of different varieties of rice is somewhat different, mainly in the protective effect of the agent on plants. In Hongmei morning, the difference between the two is very small, there is no difference between the two nine short, while the pearl short difference is significant.