ISSN: 0973-7510

E-ISSN: 2987-2990

Anil Pappachan, R. Sarada Jayalakshmi Devi and Shreeshail Sonyal
Department of Plant Pathology, S.V. Agricultural College, Tirupati – 517502, India.
© The Author(s). 2015
J. Pure Appl. Microbiol., 2015, 9 (4): 2987-2990.
Received: 29/05/2015 | Accepted: 09/08/2015 | Published: 31/12/2015
Abstract

A field experiment was conducted to evaluate the effect of weather parameters on initiation and progress of late leaf spot (Phaeoisariopsis personata) disease in Groundnut under three different dates of sowing (July first week, July third week and August first week). Correlation and regression analysis showed that weather parameters like minimum temperature and morning relative humidity highly influenced the Initiation and progress of late leaf spot. Minimum temperature showed significant negative correlation while morning relative humidity showed significant positive correlation with the late leaf spot development which indicated that progress of late leaf spot epidemic was favoured by high morning relative humidity (more than 80%) and low temperature. Maximum temperature showed significant negative correlation with disease progress in the two late sown conditions (July third week and August first week) while evening relative humidity showed significant positive correlation only in second date of sowing (July third week sowing). Area Under Disease Progress Curve (AUDPC) increased and both pod yield and haulm yield (kg ha-1) decreased with delay in sowing time.

Keywords

Phaeoisariopsis personata, late leaf spot, weather parameters, disease progression.

Article Metrics

Article View: 795

Share This Article

© The Author(s) 2015. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.