• Behavioural response (feeding preference and dispersal posture) ofAphis gossypii Glover on brinjal crop

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      https://www.ias.ac.in/article/fulltext/anml/094/03/0295-0301

    • Keywords

       

      Brinjal; Aphis gossypii ; sigmoid growth rate; matured tissue preference; lateroangular sigmoid dispersal contour

    • Abstract

       

      During late July to early August (kharif) and late November to late December (rabi), alates ofAphis gossypii Glover appear on the old leaves of the tender brinjal plants. Population build up is quite gradual with a sigmoid growth and the pest reaches peaks during late December (kharif) and late February (rabi) when plants become mature. In course of incidence they distribute from old to young to tender leaves and the aphid incidence on these leaves is always followed by the migration of alate immigrants. Thereafter, the aphid prefers mature tissues of the crop and in course of crop maturity its dispersing trend follows from old to the other leaves as well as plants in a sigmoid posture in a latero-angular spectrum.

    • Author Affiliations

       

      T K Banerjee1 D Raychaudhuri1

      1. Department of Zoology, Calcutta University, 35 Ballygunge Circular Road, Calcutta - 700 019, India
    • Dates

       
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