On a Simplified Screening Method for Bacteriocides Against the Bacterial Leaf Blight of Rice Plants caused by Xanthomonas oryzae (Uyeda et Ishiyama) Dowson, Using Wooden Frames (1)
1969 Volume 15 Pages 10-12
Details
1969 Volume 15 Pages 10-12
This paper deals with the results of the experiment to examine the inhibitory effects of three bacteriocides on lesion enlargement of rice plants inoculated with Xanthomonas oryzae.
The plants were grown in wooden frames (60×360×20cm) and were inoculated by spraying the bacterial suspension (about 5×108/ml) at a rate of 80 ml per m2 for five times during the period from the most active tillering stage to young-panicle formation stage.
Fentiazon wettable powder (3-benzylideneamino-4-phenyl-thiazoline-2-thione 50%) at a 1, 000 ppm, organic nickel wettable powder (nickel-dimethylthiocarbamate 65%) at a 1, 625 ppm and dihydro-streptomycin sulphate at a 500 ppm were effective by twice spraying 12, 17 days after inoculations. Spraying of the former two increased the yields by 23.0-28.7%, while the third one did not increase though lesion enlargement was inhibited.
