Occurrence and distribution on reniform nematode, Rotylenchulus reniformis in and around the crops of Udaipur (Rajasthan) India

A field survey was conducted by collecting soil and root samples from 37 localities to know the association of reniform nematode (Rotylenculus reniformis) with the available crops in and around Udaipur district of Rajasthan. Out of 676 samples 496 samples showed presence of R. reniformis which constituted 73.59% of occurrence in and around Udaipur, 100% occurrence collected, six localities, 90% in three localities, and 51–90% occurrence in remaining localities. The highest population density was found in Sundervas (68.60), low to moderate population density in all the localities on the crops viz.; mustard, barley, onion and wheat. The highest % population density of R. reniformis was found on castor (67.10%) with 100% occurrence. Less population density was found on mustard, barley, onion and wheat. Crops viz. cucumber, bitter gourd and water melon showed complete absence of reniform nematodes in few localities.