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Habitat Manipulation for Biological Control of Insect Pests: A Review

Author Affiliations

  • 1Department of Entomology, GBPUAT, Pantnagar-263145, Uttarakhand, INDIA
  • 2Department of Entomology, GBPUAT, Pantnagar-263145, Uttarakhand, INDIA
  • 3Department of Entomology, GBPUAT, Pantnagar-263145, Uttarakhand, INDIA

Res. J. Agriculture & Forestry Sci., Volume 1, Issue (10), Pages 27-31, November,8 (2013)

Abstract

Habitat manipulation, which is also referred to as "Ecological Engineering", focuses on reducing mortality of natural enemies, providing the supplementary resources and manipulating host plant attributes for the benefit of natural bio-agents. This can be achieved by enhancing the plant diversity and by providing adequate refugia in the agro-ecosystem. Strips harvesting in Lucerne was found to enhance predator or parasitoid population. Strips with taller growth had greater natural enemies population than in more recently harvested strips. Kairomone extracts from scales of Helicoverpa armigera (Hubner) was found to enhance the effectiveness of the predator Chrysoperla sp. and the egg parasitoid Trichogramma sp. when sprayed on cotton fields. Creating a raised "Beetle Bank" with perennial grasses within the field, will provide suitable over wintering habitat for several natural enemies. "Envirofeast" when sprayed in cotton fields attracts various natural enemies. Habitat manipulation is an emerging technology in biological control programme, which encourages biodiversity and leads to stability and sustainability of agro ecosystem. It integrates well with other methods of biological control.

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