Population Dynamics of Hymenia Recurvalis (FAB.) (Amaranth Leaf Webber) in Garhwal Hills of Uttrakhand

Abstract

In the present study, an attempt has been made to understand the population dynamics of
the Hymenis recurvalis in different elevations of Garhwal hills. Light traps were installed
at three different experimental sites viz. Khadi, (950 m asl) at tropical, Gaza (1450 m asl)
at sub-tropical and Ranichauri (1750 m asl) in the temperate region. The pest appearance
was from 27th standard week (first week of July) (1.42-3.90moth/night) up to 46th standard
week (26th November to 2nd December) (1.60-2.0moth/night). first appearance of adult
moths (3.90) were recorded at Khadi (tropical), and Gaza (sub-tropical) (1.42) during 27th
standard week (first week of July) and thereafter, it appeared at Ranichauri (Temperate)
(2.0) during the 28th standard week (second week of July). It is clear that the moths first
appeared at lower elevations then spread towards higher elevations. The number of catches
with highest peak were observed at 24.66 moths/night at Khadi, 30.0 moths/night at Gaza
and 17.14 moths/night at Ranichauri during 39th the week (September last week)
respectively, which gradually declined after 40th week and sharply declined from 44th
week.