Those diseases which had been formerly found but not identified in detail, such as tobacco Blank death, Black root rot, Wild fire, Angular spot and root-knot nematode were studied more thoroughly.
对过去虽有发现，但无详细鉴定的烟草低头黑病、烟草根黑腐病、烟草野火病、烟草角斑病、烟草根结线虫病等进行了研究。
More than 30 kinds of diseases and pests have been reported, but the damage of sweetpotato black rot, sweetpotato root rot, sweetpotato stem nematode and sweetpotato bacterial wilt is serious.
我国甘薯病虫害危害严重，已经发现报导的有30多种，其中发生比较广泛、为害比较严重的有甘薯黑斑病、甘薯根腐病、甘薯瘟病、甘薯茎线虫病。
More than 30 kinds of diseases and pests have been reported, but the damage of sweetpotato black rot, sweetpotato root rot, sweetpotato stem nematode and sweetpotato bacterial wilt is serious.
我国甘薯病虫害危害严重，已经发现报导的有30多种，其中发生比较广泛、为害比较严重的有甘薯黑斑病、甘薯根腐病、甘薯瘟病、甘薯茎线虫病。
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