PLANT PARASITIC NEMATODES ASSOCIATED WITH MAJOR FRUIT AND VEGETABLE CROPS IN THE TRIBAL DISTRICT KINNAUR
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Date
2016
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UHF,NAUNI
Abstract
ABSTRACT
The present investigations were carried out during the period of research on
“Plant parasitic nematodes associated with major fruit and vegetable crops in the
tribal district Kinnaur. Three commercial vegetable (pea, potato and cabbage) and fruit
(apple, apricot and almond) crops of the tribal district Kinnaur were taken into
consideration. All the three developmental blocks of the district (Kalpa, Pooh and
Nichar) were covered under the study. Four nematodes viz., lesion nematode
(Pratylenchus coffeae), stunt nematode (Tylenchorhynchus mashhoodi), spiral nematodes
(Helicotylenchus dihystera) and juveniles (J2) of root knot nematode (Meloidogynesp.)
were found prevalent in the rhizosphere of all the vegetable and fruit crops, with their
considerable population build up. Among fruit crops, apple orchards were found
harbouring highest population of all the nematodes, followed by apricot and almond,
with lesion nematode as most predominant both in terms of its frequency of occurrence
and population density. Among vegetable crops, pea was found most sensitive to
nematode infestation and was having maximum population build up of all the four
nematodes. In all the three vegetables, maximum population density was recorded for
stunt nematode. All the localities of Kalpa block were found having highest nematode
populations in both fruit and vegetable crops rhizosphere. Although, there was recorded
positive impact of soil temperature and moisture onthe buildup of different nematode
population, both in fruit and vegetable crops, their impact did not remain considerable on
the population of all the nematodes.
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