1Department of Plant Pathology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Keezhvelur, Nagapattinam - 611 002, Tamil Nadu, India
2Department of Plant Pathology, Uttar Banga Krishi Viswavidhyalaya, Coochbehar - 736 165, West Bengal, India
3Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore - 641 003, Tamil Nadu, India
4Department of Plant Breeding, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai - 625 104, Tamil Nadu, India
5Sugarcane Research Station, Tamil Nadu Agricultural University, Cuddalore - 607 001, Tamil Nadu, India
*Corresponding author Email : ahila.devi1@gmail.com
Online Published on 18 June, 2024.
The maximum control of powdery mildew disease by the treatment of Ampelomyces quisqualis liquid formulation at 4 mL L-1 recorded a Percent Disease Index (PDI) of 8.54 in pot culture experiments. The Trichy isolate I7 was found to be the most virulent and was confirmed with 78.37% disease incidence under pot culture condition. The induction of defense mechanisms in blackgram plants by spraying Ampelomyces quisqualis at different concentrations was well established by the estimation of different defence-related enzymes viz., Peroxidase, Polyphenol oxidase, Phenyl Ammonia lyase, β-1,3 glucanase, Catalase and Chitinase. SEM analysis of the leaf samples revealed antagonistic nature of Ampelomyces quisqualis. The reduction of conidia of E. polygoni was observed after treatment with Ampelomyces quisqualis at 4 mL L-1.
Blackgram, Induced systemic resistence, Peroxidase, Polyphenol oxidase, Phenyl alanine ammonia lyase
