Correlation Between Initial Nematode Population Density and Crop Losses Caused by Heterodera avenae in Wheat
Manisha *
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
B.L. Baheti
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
Ramavath Abhi
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
R. N. Kumhar
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
Deepak Kumar
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
C. P. Nama
Department of Nematology, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
*Author to whom correspondence should be addressed.
Abstract
An experiment was conducted to find out the effect of different inoculums levels(0, 2, 4, 8 and 16 cyst/plant)H. avenae on wheat. Among different inoculums level, highest females/5 g root (32.75), cysts per 200 cc soil (43.07) and juveniles per 200 cc soil (358.75) were recorded in 16 cyst/plant whereas lowest were recorded in 2 cyst/plant. Maximum shoot length (79.85 cm), shoot weight (28.84 g), root length (32.10 cm), root weight (7.71 g), fodder yield (23.72) and grain yield (15.81) were recorded in uninoculated plants (0 cyst/plant) whereas minimum was at 16 cyst/ plant. Significant reduction in plant growth characters were observed at and above 4 cyst/plant. Hence, experimental result revealed threshold level of 4 cyst per plant on wheat.
Keywords: Nematode, crop, Heterodera avenae, wheat