Vol. 11, Issue 4 (2022)

Author(s):
Sushila Yadav, RP Ghasolia, Astha Sharma and Deepak Yadav

Abstract:
Ber (Ziziphus mauritiana Lamk.) is commercially grown in arid and semi-arid regions of India and other countries. The powdery mildew of ber incited by Oidium erysiphoides f. sp. ziziphi Yan and Wang (perfect stage: Microsphaera alphitoides f. sp. ziziphi Griffon and Maublance) is a major disease in India, and causing heavy loss in productivity and quality of fruits and mostly appeared in the last week of Octoberand reaches at peak in the month of December.Tomanage the disease, five fungicides along with newer combined formulations (tebuconazole 50% + trifloxystrobin 25% WG, metiram 55% + pyraclostrobin 5% WG, fluxapyroxad 250g/l + pyraclostrobin 250 g/l, myclobutanil and azoxystrobin 23% SC) were sprayed twice under natural conditions in orchard. Among thesetebuconazole 50% + trifloxystrobin 25% WG (@ 0.1%) was recorded highly effective with minimum disease intensity (6.47%). In conclusion, the use of noval fungicides in combined formulations may be the most powerful tools in combating this disease with economical return.