Epidemiological Studies on Powdery Mildew (Oidium erysiphoides f. sp. ziziphi) of Ber in Scarce Rainfall Zone of Andhra Pradesh
Keywords:
Ber, epidemiology, powdery mildew, pathogen, abiotic factorsAbstract
Ber, known as the king of arid fruits, is an ancient fruit crop cultivated in arid and semi-arid regions of India. Powdery mildew, caused by Oidium erysiphoides f. sp. ziziphi Yen and Wang, is a significant limiting factor in the successful cultivation of ber. To study the effect of different abiotic environmental factors on disease development, a field experiment was conducted from 1998 to 2015 on ber cultivar Gola. Based on the epidemiological studies on ber powdery mildew, it was concluded that disease initiation occurred during the 35th or 36th standard meteorological weeks. The disease was significantly and negatively correlated with minimum temperature (<23.60°C) and rainfall (<24.76 mm) and positively correlated with relative humidity (>76.32%) and sunshine hours (>5.39 hours).Downloads
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