Meteorological variables in relation to an epiphytotic of powdery mildew disease of Mustard


137 / 107

Authors

  • V.A. SOLANKI, B.K. PATEL and A.M. SHEKH Wheat Research Station, Gujarat Agricultural University, Vijapur 382 870

Keywords:

Meteorological variables, Indian mustard, powdery mildew

Abstract

Development and progress of powdery mildew (Erysiphe cruciferarum) disease on Indian mustard was studied in relation to meteorological factors in 3 consecutive rabi seasons in 1992/93-1994/95. Studies were carried out in Anand, Gujarat, India. For the initiation of development of powdery mildew, mean temperature, number of trapped conidia and crop age showed a significantly positive correlation. Regression analysis of these factors accounted for 75% per cent of the variation. Excluding the averagenumber of trapped conidia accounted for 69% of the variation (R=0.69). A significantly positive correlation of accumulated growing degree days (GDD) and cumulative number of trapped conidia (from flowering to harvesting stage) was observed with area under disease progress curve. These elements were the most effective determinants in predicting the area under disease progress curve, which explained 78% of the variation (R=0.78).

Downloads

Issue

Section

Research Articles

How to Cite

and A.M. SHEKH, V. S. B. P. (2002). Meteorological variables in relation to an epiphytotic of powdery mildew disease of Mustard. Indian Phytopathology, 52(2), 138-141. https://epubs.icar.org.in/index.php/IPPJ/article/view/19485