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 val...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.展开更多
苹果轮纹病[Botryosphaeria dothidea（Moug．）Ces．et De Not．]是富士苹果的主要病害，该病在环渤海湾和黄河故道苹果产区已严重影响苹果生产。据2008年调查，国内苹果枝干轮纹病总体发病率达77．6％，因轮纹病一般年份苹果果实损失2...苹果轮纹病[Botryosphaeria dothidea（Moug．）Ces．et De Not．]是富士苹果的主要病害，该病在环渤海湾和黄河故道苹果产区已严重影响苹果生产。据2008年调查，国内苹果枝干轮纹病总体发病率达77．6％，因轮纹病一般年份苹果果实损失20％～30％，严重年份损失70％以上。展开更多
文摘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.
文摘苹果轮纹病[Botryosphaeria dothidea（Moug．）Ces．et De Not．]是富士苹果的主要病害，该病在环渤海湾和黄河故道苹果产区已严重影响苹果生产。据2008年调查，国内苹果枝干轮纹病总体发病率达77．6％，因轮纹病一般年份苹果果实损失20％～30％，严重年份损失70％以上。
