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对孟加拉国4个苗圃(IFES、IFESCU、BFRI和ANC)内水黄皮叶斑病症状和严重性进行了调查,结果表明:IFESCU苗圃内叶斑病侵染率及致病指标最高、BFRI次之、ANC最低。与叶斑病相关联的组织从发病植株分离出来,被分离的真菌形成致病性。结果证实胶孢炭疽菌即为致病菌。观察了杧果炭疽病菌丝体生长抑制性并对杀菌剂(Bavistin,Cupravite and DithaneM-45)有效性和浓度(0.05,0.10,0.50,1.00,1.50和2.00%)进行了鉴定。0.05% Bavistin和Cupravite潜伏8天后,菌丝体生长分别处于最低和最高水平。结果表明:Bavistin杀菌效果最好、Diathane M-45次之,Cupravite对菌丝体生长的抑制作用最低。图1表4参27。
The symptoms and severity of the leaf blotch leaf spot in four nurseries in Bangladesh (IFES, IFESCU, BFRI and ANC) were investigated. The results showed that the infection rate and pathogenic index of leaf spot in IFESCU nursery were the highest, The lowest ANC. Tissues associated with leaf spot are isolated from diseased plants and isolated fungi are pathogenic. As a result, it confirmed that Colletotrichum gloeosporioides is a pathogen. The mycelial growth inhibition of P. meliloti was observed and the effectiveness and concentration of the fungicide (Bavistin, Cupravite and Dithane M-45) were assessed (0.05, 0.10, 0.50, 1.00, 1.50 and 2.00%). Mycelial growth was at the lowest and highest levels, respectively, after incubation with 0.05% Bavistin and Cupravite for 8 days. The results showed that the bactericidal effect of Bavistin was the best, followed by Diathane M-45, and Cupravite had the lowest inhibitory effect on mycelial growth. Figure 1 Table 4 Reference 27.