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采用菌丝生长速率法和孢子萌发法在室内条件下测定了8种杀菌剂对葡萄炭疽病病原菌的抑制作用。试验结果表明,咪鲜胺、吡唑醚菌酯、丙环唑、甲基硫菌灵和戊唑醇对葡萄炭疽病病原菌的菌丝生长有明显的抑制作用,EC50分别为0.025 8、0.087 0、0.492 7、0.623 4、1.420 1 mg/L;吡唑醚菌酯、福美双、甲基硫菌灵对葡萄炭疽病病原菌的孢子萌发有很好的抑制作用,EC50分别为1.19×10-6、2.34×10-4、5.94×10-4mg/L。室内测定结果表明,嘧菌酯和福美双1?10混配时有较强的增效作用。田间试验结果表明,55%嘧菌酯.福美双可湿性粉剂1 500倍液涂抹枝条后对葡萄炭疽病的防效达75.78%;25%吡唑醚菌酯乳油3 000倍液喷洒果穗后对葡萄炭疽病的防效达87.62%。
The mycelium growth rate method and spore germination method were used to determine the inhibitory effect of eight fungicides on pathogen of grape anthracnose in laboratory. The results showed that prochloraz, pyraclostrobin, propiconazole, thiophanate methyl and tebuconazole significantly inhibited mycelial growth of pathogen of grape anthracnose with EC50 of 0.025 8 and 0.087 0 , 0.492 7,0.623 4,1.420 1 mg / L, respectively. Pyraclostrobin, thiram and thiophanate-methyl could inhibit the spore germination of anthracnose pathogen of grape with EC50 of 1.19 × 10-6 , 2.34 × 10 -4, 5.94 × 10 -4 mg / L. The results of laboratory tests showed that azoxystrobin and the United States and the United States bi-1 10 mixed with a strong synergistic effect. The results of field trials showed that the control effect of 55% azoxystrobin and thiram WP 1 500 times on grape anthracnose was 75.78%. After 25% pyraclostrobin EC 3000 spraying the ear, The control effect of grape anthracnose reaches 87.62%.