Epidemiological Studies of Rice Blast Disease Caused by Pyricularia oryzae Cavara. VI. Measurement of Sporulation on Blast Lesions of Naturally Infected Leaf.

Epidemiology of Rice Blast Disease in Korea

“…. In case of a lesion from which pre-existing conidiophores and conidia were removed, sporulation was much lesser than that of intact lesions (Kim et al, 1990). .…”

“…The main objective of this experiment was to measure the amount of sporulation under natural conditions as we did for conidial release (Kim et a/., 1990). The main objective of this experiment was to measure the amount of sporulation under natural conditions as we did for conidial release (Kim et a/., 1990).…”

“…As a result, a KY -type spore trap (Figure 1, Kim and Yoshino, 1987) was devised in 1985, and using the trap large amount of data was collected under different weather conditions. As a result, a KY -type spore trap (Figure 1, Kim and Yoshino, 1987) was devised in 1985, and using the trap large amount of data was collected under different weather conditions.…”

“…Figures 2 and 3 illustrate spore catches in different devices: the KY-type spore trap (Kim and Yoshino, 1987) is used for measurement of conidia release; the rotation sampler (Suzuki, 1969a) for measurement of dynamic conidial dispersal and a horizontal spore trap for measurement of static conidial dispersal. Figures 2 and 3 illustrate spore catches in different devices: the KY-type spore trap (Kim and Yoshino, 1987) is used for measurement of conidia release; the rotation sampler (Suzuki, 1969a) for measurement of dynamic conidial dispersal and a horizontal spore trap for measurement of static conidial dispersal.…”

Effects of leaf blast on growth and production of a rice crop. 2. Analysis of the reduction in dry matter production, using two models with different complexity

“…They estimated that the pathogen used 230 to 570 kg CH 2 0 ha--1 for spore production and related processes. Data on the rate of sporulation of blast lesions are diverging, but data on the production pattern of the lesions are rather uniform (Kato et al, 1970;Kato and Kozaka, 1974;Ou, 1985;Kim et al, 1987). Lesions start to produce spores immediately after their appearance, and spore production may last for 20 to 30 days.…”