STUDIES ON LIFE AND FERTILITY TABLES OF Meloidogyne incognita ON DIFFERENT VEGETABLE CROPS
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Date
2017-11
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation on “Studies on life and fertility tables of Meloidogyne
incognita on different vegetable crops” was carried out during 2015-2016 in the Department
of Entomology, Dr. Y S Parmar University of Horticulture and Forestry, Nauni, Solan. Five
different vegetable crops viz. tomato, cucumber, okra, French bean and cauliflower were
selected for the studies and were carried out under room and controlled temperature
conditions (28.8±2.4°C and 25.0±1°C, respectively). Results revealed that at constant
temperature, the total developmental period of the nematode was 30, 32, 26, 32 and 25 days
on tomato, cucumber, okra, French bean and cauliflower, respectively, while at room
temperature it was 34, 23, 27, 31 and 27 days, respectively. Significant variation in the
fecundity of M. incognita was found on five vegetable crops. It was found to be highest on
cucumber (869.45 eggs/ female) and minimum on cauliflower (348.69 eggs/ female) at
constant temperature, while at room temperature maximum on tomato (902.83 eggs/ female)
and minimum on okra (272.55 eggs/ female). Maximum time to complete one generation by
the nematode was on tomato (26.35 days), while the minimum time was taken on okra (12.38
days).Under room temperature the maximum generation time was on tomato and minimum
on cucumber. At constant temperature, the nematode took 4.85, 2.89, 4.23, 3.24 and 3.59
days to double itself on tomato, cucumber, okra, French bean and cauliflower, respectively,
while under room temperature it was 3.19, 2.97, 4.78, 3.30 and 4.36 days respectively. At
constant temperature, the true intrinsic rate of increase (rm) and the finite rate of natural
increase ( ) were maximum in cucumber and tomato, respectively, while they were minimum
in vice versa parameters. However, under room temperature the above two parameters were
highest in cucumber (0.23) and okra (1.93), respectively, while minimum in okra (0.145) and
cucumber (1.46), respectively.
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