Vergara - 1976 - Physiological and morphological adaptability of ri

422 CLL\-IATE AND RICE
less than l m/sec of wind speed 2 in above the ground. The release otleotlidia is
brought about after they ripen. Ono and Suzuki (1959) suggested the necessity‘
of a drop of water tbr take-off.
Sporulation on a lesion and eonidial release from the lesion proceed at the
same time under the humid conditions in a field. The lesions in the field were
classified into two groups: (l) those whose surface uras xviped to remove conitllOphUftiS
and eonidia produced earlier, and (2) those whose surface remained
untreated. These lesions were collected every 2 hours at night and the number of
conidia per lesion was counted. The response in the first group indicated one peak
of the number ofconidia at midnight (Fig. 7). In the second group. there were two
peaks per lesion. It was thought that production of conidia on the conidiophores
Conidit: (D5! lesion)
2g _
l5 -
l0 — v
‘
on lesiors after
ooridiophores were wiped
. ff ct 5pm
5 .-
° ll é ll 1 5 é l