EFFECT OF SOIL TEMPERATURE ON THE POPULATION OF MIGRATORY NEMATO DE PRA TYLENCHUS PENETRANS (COBB, 1917) (NEMATODA : HOPLOLAMIDAE) ON TEA PLANTATIONS
MADAN LAL *
PARASITOLOGY LABORATORY, DEPARTMENT OF ZOOLOGY, D.A. V. (PG) COLLEGE, DEHRADUN-248 001, INDIA
R.K. JAUHARI *
PARASITOLOGY LABORATORY, DEPARTMENT OF ZOOLOGY, D.A. V. (PG) COLLEGE, DEHRADUN-248 001, INDIA
*Author to whom correspondence should be addressed.
Abstract
The present investigation reveals laboratory based studies on the effect of different soil temperature on the population build up of Pratylenchus penetrans under tea plantations in sandy-clay and sandyloam soil. An initial population of 100 P. penetrans showed maximum number (1912) at 25°C in sandy-clay whereas in sandy loam soil the number was 1692 at 30°C on termination of the experiment, after three months. The lowest population of P. penetrans (129) was observed in sandyclay at 35°C and (250) in sandy-loam at 35°C. The findings of the present investigation have been compared with the results of earlier workers.
Keywords: Soil temperature, population, nematode, Pratylenchus penetrans, tea plantation