Advertisement

Distribution Pattern of Bemisia Tabaci (Gennadius) in Cotton Plant

  • L. Krishna Naik
  • S. Lingappa
Research Article

Abstract

Investigations on temporal distribution of Bemisia tabaci (Gennadius) was carried out on 14 weeks old cotton genotype, RAS 299–1, during 1987–1988 at Raichur (Karnataka). Oviposition was restricted mainly on the leaves of the youngest branches. Highest egg load of 89.16 per sq cm was recorded on youngest leaf of terminal host branch. Nymphal and pupal population was more on the middle leaves than on extreme leaves and followed a normal curve in their distribution. Adults exhibited similar trend in distribution to that of the egg stage.

Key Words

Bemisia tabaci temporal distribution cotton whitefly 

Résumé

Des études sur la distribution temporeile de Bemisia tabaci (Gennadius) ont été condultes en 1987–1988 à Raichui (Karnataka) sur des cotonniers de la variété RAS 299-1 âgés de 14 semaines. L’oviposition était principalement limitée aux feuilles des plus jeunes branches. Le taux de ponte le plus élevé correspondent à 89.16/cm2, a été observé sur les jeunes feuilles des branches terminales. La population larvaire et pupale était plus concentrée sur les feuilles de milieu que sur celles des extrêmités, et suivait dans leur distribution une courbe normale. Les adultes affkhaient la même tendance de distribution que les oeufs.

Mots Clés

Stades de Bemisia tabaci distribution temporelle feuilles et branches de cotonnier 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. David B. V. and Jesudasan R. W. A. (1986) Status of the cotton whitefly, Bemisia tabaci (Gennadius) excluding the vector biology. Pesticides 20, 42–47.Google Scholar
  2. El-Khidir E. (1965) Bionomics of the cotton whitefly (Bemisia tabaci Genn.), in the Sudan and the effects of irrigation on population density of whiteflies. Sudan Agric. J. 1, 8–22..Google Scholar
  3. Hussain M. A. (1931) A preliminary note on the whitefly of cottons in the Punjab. Agric. J. India 25, 508–526.Google Scholar
  4. King H. H. (1932) Report of the Government Entomologist for the year 1931. Bull. Wellcome Trop. Res. Lab., Sudan Govt. Entomol. Section 34, 12.Google Scholar
  5. Ohnesorge B. and Rapp G. (1986) Methods for — estimating the density of whitefly nymphs (Bemisia tabaci Genn.) in cotton. Trop. Pest Manage. 32, 207–211.CrossRefGoogle Scholar
  6. Ohnesorge B., Sharaf N. and Allawi T. (1980) Population studies on the tobacco whitefly, Bemisia tabaci Genn. (Homoptera: Aleyrodidae) during the winter season I. The spatial distribution on some host plants. Z. Angew. Entomol. 90, 226–232.CrossRefGoogle Scholar

Copyright information

© ICIPE 1992

Authors and Affiliations

  • L. Krishna Naik
    • 1
  • S. Lingappa
    • 1
  1. 1.Department of Agricultural EntomologyCollege of AgricultureDharwadIndia

Personalised recommendations