Department of Entomology, College of Agriculture, CCS Haryana Agricultural University, Hisar-125004
*Correspondence: Roshan Lal, Pulses Section, Dept. of Plant Breeding, CCS HAU, Hisar
Online published on 15 October, 2011.
A study was carried out under laboratory condition to evaluate the methanol extract of ginger, Zingiber officinale and its fractions for ovipositional behaviour and hatchability of eggs of Helicoverpa armigera. Number of eggs laid under choice condition varied from 36.0 (10% methanolic extract) to 90.7 (0.5% benzene fraction) eggs in tteated substrate, whereas in untreated substrates, it ranged from 51.0 (10% methanol extract) to 94.0 eggs (0.5% benzene fraction). Under no-choice condition, it ranged from 106.0 (10% methanol extract) to 207.3 eggs (0.5% benzene fraction). In without actual contact method, it varied from 109.0 (10% methanol extract) to 211.0 eggs (0.5% benzene fraction). When adults of Helicoverpa armigera were allowed to feee do sucrose deit containing different concentrations of methanol extract and its fractions, number of eggs ranged from 151.0 (2.0% chloroform fraction) to 241.0 eggs (0.5% hexane fraction) and hatching ranged from 64.7% (2.0% hexane fraction) to 75.7% (0.5% acetone fraction). When muslin cloth containing 50 eggs were dipped and air-dried, the hatching ranged from 48.0% (2.0% hexane fraction) to 84.0% (2.5% methanol extract). Thus, extracts and fractions of ginger showed linear concentration dependent moderate effects on egg laying and hatchability of eggs of Helicoverpa armigera.
Helicoverpa armigera, Methenol extract, Ginger
