Ecology, Environment and Conservation Paper

Vol 23, Issue 2, 2017; Page No.(859-863)

POPULATION DYNAMICS OF SUGARCANE LEAF HOPPER, PYRILLA PERPUSILLA WALKER WITH RELATION TO ABIOTIC FACTOR IN BIHAR, INDIA

Prakash Chand, Anil Kumar, Hari Chand and Sudhir Paswan

Abstract

The population of egg masses and its peak (7.0 egg masses/10 leaves) was observed in the first fortnight of June 2015. It was found that temperature, (maximum and minimum) showed highly significant positive correlation with egg masses of the insect. While relative humidity (07 hrs.) Showed significant correlation but statistically had negative relationship. In case of nymphs population which were ranged from 0.1 to 45.5 per ten leaves, and reached its peak (45.5 nymphs/10 leaves) was observed in the first fortnight of June, 2015. Temperature (maximum and minimum) showed highly significant positive correlation with population (nymphs) of the insect. While relative humidity recorded (07 hrs. and 14 hrs.) showed significant correlation but statistically had negative relationship. The population of adults and its peak (35.2 adults/10 leaves) in the second fortnight of May 2015 and temperature, (maximum and minimum) showed highly significant positive correlation with adults population of the insect. While relative humidity recorded at 07 hrs. showed significant negative correlation but statistically was found to be negative relationship. However, rainfall exhibited positive correlation but statistically non-significant with egg masses, nymph and adult.

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