Studies on the resistance of rice-plant against the attack of rice-stem-borer (Chilo simplex Butler). : (III) Interrelation between the plant character and the occurence of the incipient damages in the first generation of rice-stem-borer (Preliminary report)

摘要

(1) Five incubated egg-batches were inoculated on rice-plant of various varieties in the field, and the occurence of the incipient by borers were investigated. (2) The damages occured within the narrow range on the lee-ward of inoculation centre. (3) The percentage of the damaged tillers of 6 hills within 2∼3 feet afar, the figures being adjusted by the damages of contorol (non-inoculated) plot, expressed clearly the grade of the damages. (4) The grade of the damages are correlated both with the "cover degree" of varieties and also with the grade of resistance of plant against larvae intrusion. (5) This relation will be affirmed on the Figure 2.