Evaluation of Ber germplasm against Oidium erysiphoides f. sp. ziziphi, causing powdery mildew

Abstract

Powdery mildew incited by Oidium erysiphoides f. sp. ziziphi, Yan and Wang is the most important disease that causes maximum reduction in yield and quality of ber (Ziziphus mauritiana Lamk.) fruits grown under semi-arid and arid regions of India. Developing a varietal resistance to disease provides an early, cheaper, stable and effective means of disease control. In the present investigation, 34 genotypes were tested for resistant against Oidium erysiphoides f. sp. ziziphi. Out of theses, Sanaur No.1(4.75%), Darakhi No.2(3.99%), Shamber (5.00%) and S8 16 (4.00%) four cultivars/ germplasm categorized as resistant whereas Sanaur No.6 (20.00%), Khatti (18.00%), Muria Maharara (5.20%), S617 (14.45%) and Safeda Selection (13.25%) showed moderately susceptible reaction and remaining showed susceptible and highly susceptible reaction. No fruiting observed on Tikri, Noki, Sanuar No. 3, Darakhi No. 1, Gutka and S7 15 germplasms/ cultivars.