摘要
The inhibitory effects of 10 fungicides on apple tree valsa canker were compared on dishes and twigs.The results showed that conidia germination and mycelial growth were inhibited by all fungicedes tested.The EC50 value of Difenoconazole was 6.1×10-3 μg·mL-1,the lowest among tested fungicide in inhi-biting conidia germination.Tebuconazole and Imazalil also showed obvious inhibition effect.Thiophanate-methyl was the least efficient with the EC50 value 2.6×101 μg·mL-1.Difenoconazole also showed the highest activity for inhibiting mycelial growth with EC50 value of2.3×10-2 μg·mL-1.Tebuconazole was better than other fungicide.Thiophanate-methyl and Propineb were the least efficient with quite high EC50 value.Furthermore,the size of the lesion after inoculation on excised twigs also revealed that Difenoconazole was most efficient because it showed the smallest lesion of 394 mm2 compared with other tested fungicides.So Difenoconazole and Tebuconazole could be used to control apple tree valsa canker in field to subsititute forbided fungicides such as asomate.
The inhibitory effects of 10 fungicides on apple tree valsa canker were compared on dishes and twigs. The results showed that conidia germination and mycelial growth were inhibited by all fungicedes tested. The EC50 value of Difenoconazole was 6. 1×10^-3μg·mL^-1, the lowest among tested fungicide in inhibiting conidia germination. Tebuconazole and Imazalil also showed obvious inhibition effect. Thiophanatemethyl was the least efficient with the EC50 value 2.6×10^1 μg·mL^-1. Difenoconazole also showed the highest activity for inhibiting mycelial growth with ECho value of 2.3×10^-2 μg·mL^-1. Tebuconazole was better than other fungicide. Thiophanate-methyl and Propineb were the least efficient with quite high EC50 value. Furthermore, the size of the lesion after inoculation on excised twigs also revealed that Difenoconazole was most efficient because it showed the smallest lesion of 394 mm^2 compared with other tested fungicides. So Difenoconazole and Tebuconazole could be used to control apple tree valsa canker in field to subsititute forbided fungicides such as asomate.
出处
《植物病理学报》
CAS
CSCD
北大核心
2009年第5期549-554,共6页
Acta Phytopathologica Sinica
基金
国家自然科学基金(30771396)
公益性行业(农业)科研专项(nyhyzx07-055)
陕西省自然科学基金(2005C127)
教育部"长江学者和创新团队"支持计划(PCSIRT200558)
高等学校学科创新引智计划资助项目(B07049)
