Tocabbage black rot, no cultivar was highly resistant, 75 were tolerant, 4were resistant and 61 shsceptible.

抗黑腐病的4份，耐病的75份，感病的61份，未发现高抗材料。

Chestnut is a famous fruit but it can get black ret easily. The losses produced by black rot are as high as 70%.

板栗是著名的果实，但储藏中易发生黑斑病，造成高达70%的损失。

Results of correlation analysis indicated that there was not any correlation between resistance to black rot of varieties and its main economic characters.

相关分析显示，甘薯品种抗黑斑病性与其它主要经济性状间没有相关关系。

The results showed that illumination affected the growth rate and resistance of Azolla against black rot disease, both of which were lower under weak light (Tables 1,2).

结果表明，光照影响各满江红品系的生长速率与抗霉腐病能力，随着光照强度减弱，各品系的生长速率和抗霉腐病能力都下降。

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。