The first two periods should be taken as the first and second application time to prevent the tobacco bacterialwiltdisease respectively.
青枯菌检出阳性和根黑色坏死的始发期可作为防治青枯病第一次和第二次施药时期。
2
The pathotypes, classification of cultivar resistance, advancement of resistance genetics and latent infection of bacterialwiltdisease of sweet potato were presented.
阐述了甘薯瘟菌系致病类型、品种抗性分类、抗性遗传趋势和病菌潜伏侵染特征;
3
Bacterialwilt of eucalyptus, a widespread disease both at home and abroad, had become a severe obstacle for the development of eucalyptus industry.