Spatial Distribution Pattern of Cotton Leafhopper, Amrasca biguttula (Ishida) (Homoptera: Cicadellidae)

Authors

  • Ohnmar Khaing Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
  • Praparat Hormchan Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
  • Surachate Jamornmarn Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
  • Ngarmchuen Ratanadilok Department of Agronomy, Faculty of Agriculture, Kasetsart University, Nakon Pathom 73140, Thailand.
  • Arunee Wongpiyasatid Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok 10900,Thailand.

Keywords:

cotton leafhopper, Amrasca biguttula, distribution

Abstract

The spatial distribution pattern of cotton leafhopper, Amrasca biguttula (Ishida) was studied under field conditions during 2000 and 2001 at Suwan Farm, Pak Chong, Nakon Ratchasima, Northeastern Thailand. The cotton varieties/lines: Sri Samrong 60 (the recommended variety), Sarid1 and new mutant lines AP1 and AP2 were used in the experiments employing Randomized Complete Block design with 4 replications. The results of both seasons showed that the distribution of A. biguttula was clumped for all varieties/lines and degree of aggregation considerably changed during the generations, as indicated by the values of variance to mean ratio (s2/ x), negative binomial parameter (k) and the index of aggregation (Iδ). The results of distribution analysis were used to estimate a given sample size and precision level of cotton leafhopper. The appropriate sample size of maximum 10 and 30 plants could be required at low and high aggregation levels of A. biguttula, respectively.

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Published

2002-03-31

How to Cite

Ohnmar Khaing, Praparat Hormchan, Surachate Jamornmarn, Ngarmchuen Ratanadilok, and Arunee Wongpiyasatid. 2002. “Spatial Distribution Pattern of Cotton Leafhopper, Amrasca Biguttula (Ishida) (Homoptera: Cicadellidae)”. Agriculture and Natural Resources 36 (1). Bangkok, Thailand:11-17. https://li01.tci-thaijo.org/index.php/anres/article/view/242681.

Issue

Vol. 36 No. 1 (2002): January-March

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.