Investigation of Incubation Period of Neck Blast in Rice Plants

목도열병의 잠복기간구명 시험

Incubation period of rice neck blast was investigated by injection of conidial suspension of Pyricularia oryzae into young panicles inside the flag leaf sheath at booting stage. Eleven to fifteen days were taken for symptom appearance from the date of injection. About two days were taken from conidia germination until infection occurred, the incubation period was determined as nine to thirteen days for the symptom development of neck blast in rice plants.

수잉기에 지엽엽초내의 유수를 도열병균포자현탁액으로 주사접종후 목도열병병징발현시의 잠복기간을 구명하였다. 접종일로부터 병징발현시까지 $10.9\~15.1$일이 소요되었는데 병원균의 발아, 부착기형성, 침입, 감염이 일어나기까지의 소요일수 약 2일간을 감안할 때 목도열병의 잠복기간은 9일에서 13일 사이로 측정되었다.