Studies on population dynamics of major pests of okra

LAKSHMIKANTHA D H; VEERANNA R; GURUPRASAD G S; BABU P

doi:10.61475/JFS.2023.v36i3.18

LAKSHMIKANTHA D H Department of Agricultural Entomology, College of Agriculture, Dharwad, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
VEERANNA R Department of Agricultural Entomology, College of Agriculture, Dharwad, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
GURUPRASAD G S Department of Agricultural Entomology, College of Agriculture, Dharwad, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
BABU P Department of Agricultural Entomology, College of Agriculture, Dharwad, University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India

DOI: https://doi.org/10.61475/JFS.2023.v36i3.18

Keywords: Fruit borers, Okra, Sucking pests

Abstract

Okra [Abelmoschus esculentus (L.) Moench] is known to
be infested by many insect pest among them the most important ones
are sucking pests like aphids, leafhopper, whitefly and fruit borers
like Earias vitella and Helicoverpa armigera. Controlling these pests
is very much important to obtain good yield, hence knowledge about
these pest incidence needed for taking up management practices. In
this context, okra was sown during last week of November (rabi
2020-21) and observations were recorded at weekly interval. Peak
incidence of aphid (23.44 aphids/3 leaves) and leafhopper (16.97
leafhopper/3 leaves) noticed during last week of December, whitefly
(12.70 whiteflies/3 leaves) during second week of March. Fruit borers
during third week of February and second week of March with per
cent fruit damage of 44.9 (Earias vitella) and 13.59 (Helicoverpa
armigera).Sucking pests incidence more up to 10th week old crop,
there after the population declined. In case of fruit borers, they
persisted upto end of the season