Vol. 11, Issue 6 (2022)

Author(s):
Pansuriya BJ and Patel NR

Abstract:
Some of plant diseases can be effectively lowered by altering sowing dates. The present work was carried out to study the effect of sowing dates on intensity of powdery mildew disease of coriander incited by Erysiphe polygoni during the year 2021-22. The coriander variety Gujarat coriander-2 was sown at four different dates having fortnightly intervals. The results indicated that the subsequent delay in sowing caused progressive increase in the powdery mildew intensity. The early sown crop (1^st week of November) proved to be the most effective in reducing the disease (24.79%) and increasing the seed yield of coriander (1418 kg/ha) followed by sowing of 3^rd week of November in succession with subsequent increase in per cent disease intensity (46.40%) and reduction in yield (1063 kg/ ha). The highest volatile oil (0.408%) and 1000 seed weight (14.06 g) was recorded in early sown crop (1^st week of November), whereas, they were the lowest in late sown crop (3^rd week of December) with 0.278 per cent of volatile oil and 9.48 g of 1000 seed weight.