Development of Tolerant Traits in Tea Mosquito Bug (Helopeltis Theivora Waterhouse) (Hemiptera: Miridae) under Insecticide Stress

Authors

  • Ananda Mukhopadhyay Entomology Research Unit, Department of Zoology, University of North Bengal, District Darjeeling, West Bengal (734 013), India
  • Somnath Roy Tea Research Association, Tocklai Experimental Station, Cinnamara, Jorhat, Assam (785 008), India

Keywords:

Insecticide stress, tolerant traits, Helopeltis theivora

Abstract

Despite continuous application of synthetic insecticides of different kinds, the sucking pest of tea, Helopeltis theivora Waterhouse (Hemiptera: Miridae) has become most damaging to tea crop in Darjeeling Terai-Dooars and North East India. In convention­ally managed tea plantations, specimens of H. theivora get a regular exposure to syn­thetic insecticide showing significantly enhanced values of median lethal concentration or LC50. Such pesticide-stressed populations of H. theivora mainly sported changes in (i) colouration (ii) development and fitness (iii) body lipid quantity (iv)detoxify­ing enzyme levels and (v) egg-laying behavior implying adaptive changes of certain fitness components in the biology of the tolerant/ resistant strains. This study reveals a reduced efficacy of insecticides (viz. endosulfan, quinalphos, oxydemeton methyl, imidacloprid, monocrotophos, thiametoxam, cypermethrin and lambda cyhalothrin) against conventional field populations of H. theivora, possibly due to the changed traits in the insecticide- stressed but tolerant populations of H. theivora. Such devel­opments throw up serious challenges for management of this major sucking pest of tea in Terai-Dooars and the North East India.

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Published

2013-09-07

How to Cite

1.
Mukhopadhyay A, Roy S. Development of Tolerant Traits in Tea Mosquito Bug (Helopeltis Theivora Waterhouse) (Hemiptera: Miridae) under Insecticide Stress. IJBSM [Internet]. 2013 Sep. 7 [cited 2025 Sep. 9];4(Sep, 3):418-23. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/407

Issue

Vol. 4 No. Sep, 3 (2013)

Section

Articles

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