This experiment was undertaken with the purpose of obtaining the basical data on the culturing techniques, breeding and plant protection in the cultivating of Sweet sorghum in Korea. The Sweet Sorghum 11 U.S. varieties, 2 Japanese and 2 Koreans were c...
This experiment was undertaken with the purpose of obtaining the basical data on the culturing techniques, breeding and plant protection in the cultivating of Sweet sorghum in Korea. The Sweet Sorghum 11 U.S. varieties, 2 Japanese and 2 Koreans were cultivated unders the natural condition in infecting of disease. The investigation was performed on the varietal difference in the resist trance to bacterial strip disease and the nitrogen and sugar contents in diseased leaves, and correlation between the diseased ratio and several agronomic characteristics. The results obtained are as follows.
1) It was no found that the variety exempted from disease, White collier, Missouri groytop, Rex, Rurier Var-1 and Atlas were more resisted in certain degree, Sorip-zong (Small grain var.) Tracy, Chinese, Zeuk-Jaelaizong and Honey-I were resited in medium degree and Early sumac, Sugar drip, Red amber, Ames amber and Rex orange were weaker in resistant to disease.
2) In the Correlation between the heading data and degree in resistant disease, generally, medium maturing varites were relatively strong resistant, laste varieties were weakest with exception of very few varieties.
3) In the correlation and regression between the several agronomic characteristics and diseased ratio, the curium lenth and weight of curium had no significant differences, heading date had r= -0,591*, y=90,822-0.354x and brix degree had r= -0.68**, y=19,992-0,246x.
4) The leaves of resistance varieties were more contained the nitrogen, sugar and increased C/N ratio than those of susceptibles.