Studies on diversity indices and insect pest damage of walnuts in Kashmir, India

Shaziya GULL, Tariq AHMAD, Ajaz RASOOL

Abstract


Walnut industry, one of the economically important industries of Kashmir is under multitude of stresses like changing weather patterns, international competition, insect pest damage and diseases. Pest damage by various insect species is by for the main cause of walnut damage, thus limiting its production. In this backdrop, the aim of the present study was to check the insect pest diversity and its nature and extent of damage to walnuts. Sampling was done fortnightly in three districts of Central Kashmir viz., Srinagar, Budgam, Ganderbal from June 2014 to November 2015. Quantitative estimation of individual species was made by using various diversity indices and each site varied in species diversity, richness and evenness. A total of nine sites were selected from three different districts and the insects collected belonged to 3 orders, 7 families and 10 species. Order Hemiptera was highly damaging in comparison to Coleoptera and Lepidoptera while in Hemiptera, maximum damage was done by Chromaphis juglandicola (Kaltenbach, 1843) and the least by Apodiphus pilipes (Horvath,1889). The study provides a baseline data for assessing the biodiversity pattern and damaging potential of walnut pests so as to develop holistic integrated pest management programme.

Keywords


Juglans regia L.; diversity indices; incidence; infestation; species richness; walnut pests

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References


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DOI: http://dx.doi.org/10.14720/aas.2019.113.1.11

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