Effect of Different Inoculum Levels of Sclerotinia sclerotiorum (Lib.) de Bary on Mortality and Final Plant Stand of Pea Khan R.U.1,*, Khan Mohammad Rashid2, Ali Arshad1 1Department of Plant Protection, Faculty of Agricultuarl Sciences, A.M.U., Aligarh-202 002 (U.P.) 2India Technology Development Manager, Monsanto India Limited, Mumbai *E-mail: rukhan25@yahoo.co.in
Online published on 27 December, 2012. Abstract White rot or mould caused by Sclerotinia sclerotiorum, is an important disease of pea which occurs in different parts of the world including India. It affects all plant parts including root, stem, foliage and seed and inflict the yield losses range from 0100 per cent. The influence of different inoculum levels of pathogen on seedling mortality of two different cultivars of pea i.e., Shimla and Arkel was studied which revealed that the increasing levels of inoculum significantly influenced the mortality and final stand of plants in both cvs. Shimla and Arkel. A direct proportional trend was observed with the corresponding increasing levels of inoculum, but only up to 15 g/kg of inoculum. At this inoculum level in both cultivars maximum increase in the mortality and decrease in final plant stand was recorded. The cultivar Arkel was more susceptible at each inoculum level exhibit maximum pre and post emergence mortality. However, both exhibited comparatively higher percentage of plant mortality in post-emergence than in preemergence phase cultivars. Top Keywords Sclerotinia sclerotiorum, pea, inoculum density, pre–emergence, post-emergence mortality. Top |