Journal of
Ecology and The Natural Environment

  • Abbreviation: J. Ecol. Nat. Environ.
  • Language: English
  • ISSN: 2006-9847
  • DOI: 10.5897/JENE
  • Start Year: 2009
  • Published Articles: 408

Full Length Research Paper

Assessment of spatial distribution of pod borer, Cydia ptychora (Meyrick) on pigeonpea

S. Subharani1 and T. K. Singh2
1Muga Silkworm Seed Organization, P3 Unit,Central Silk Board Narayanpur-784164, Indian. 2Entomology Research Laboratory, Manipur University, Central Silk Board Canchipur 795003,India.
Email: [email protected]

  •  Accepted: 30 December 2010
  •  Published: 31 October 2011

Abstract

Spatial distribution of Cydia ptychora infested flower and pods of pigeonpea was studied in the experimental field of Department of Life Sciences, Manipur University. Various indices of dispersion, such as variance, variance to mean ratio, Lloyd’s index of patchiness, mean crowding, Iwao’s regression and Taylor’s power law were evaluated to study the distribution pattern. Distribution pattern of C. ptychora followed contagious behaviour of distribution on pigeonpea crops during both the years.

 

Keywords: Spatial distribution, Cydia ptychora, contagious, pigeonpea.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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