STATUS OF PLANT PARASITIC NEMATODES IN APPLE ORCHARDS OF HIMACHAL PRADESH
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Date
2014
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UHF,NAUNI
Abstract
ABSTRACT
The present investigations were carried out duringthe period of research on “Status of
plant parasitic nematodes in apple orchards of Himachal Pradesh”. In the present study, ten
plant parasitic nematodes viz. T. mashhoodi, H. dihystera, P. coffeae, P. curvitatus,
Meloidogyne sp., M. xenoplax, G. peperpotti. Xiphinema sp., Tylenchus sp.and H. indicus
were found harboring the rhizosphere of apple orchards. Most frequently occurring
nematodes were P. coffeae, H. dihystera and T. mashhoodi(100%) followed by Meloidogyne
sp. (83%), P. curvitatus, Xiphinema sp. and Tylenchus sp. (33%) and M. xenoplax and H.
indicus (16%). Highest population was recorded for the H.dihystera (600/ 200 cc soil)
followed by P. coffeae, T. mashhoodi(500) while it remained minimum for the Xiphinema
sp. (50/200 cc soil). With highest average population of 152 per 200cc soil, P. coffeae
dominated the other nematodes. Among the abiotic factors recorded viz. altitude, pH, organic
carbon, moisture, temperature and age of tree, altitude showed its significant positive impact
on the population build up of P. coffeae i.e. with the increase in altitude the nematode
population was found increased. Age of tree was also found significantly influencing the total
nematode population in the orchards with its positive impact. Impact of other parameters on
the population build up of nematodes remained non considerable.
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