Impact of release of Neochetina spp. on growth and density of water hyacinth Eichhornia crassipes

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Authors

  • K. Sivaraman
     Manonmaniam Sundaranar University, Sri Paramakalyani Centre of Excellence in Environmental Sciences, Alwarkurichi - 627412, Tirunelveli ,IN
  • A. G. Murugesan
     Manonmaniam Sundaranar University, Sri Paramakalyani Centre of Excellence in Environmental Sciences, Alwarkurichi - 627412, Tirunelveli ,IN

DOI:

https://doi.org/10.18311/jbc/2016/15596

Keywords:

Biological control, Chittar river, Eichhornia crassipes, Neochetina bruchi, Neochetina eichhorniae, water hyacinth
english

Abstract

Water hyacinth (Eichhornia crassipes) is an invasive aquatic macrophyte which creates several problems in irrigation system of rivers. To control their rapid distribution in water bodies the biological control method was carried by employing weevils Neochetina bruchi and Neochetina eichhorniae on river based field trial. The study demonstrates effectiveness of biocontrol weevil open field release on experimental site (Chittar river). When compared to first release in field, the weevil intensity was increased in numbers. Active scraping was observed in the leaves and decay spots were seen in the stems of weed. Both N. bruchi and N. eichhorniae (250 No) were introduced biyearly at experimental site for one year. During these two years of observation period, stunted growth and reduced population were observed in the study site. The study highlights importance of Neochetina spp. on the management of E. crassipes.

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Published

2017-03-16

How to Cite

Sivaraman, K., & Murugesan, A. G. (2017). Impact of release of <i>Neochetina</i> spp. on growth and density of water hyacinth <i>Eichhornia crassipes</i>. Journal of Biological Control, 30(3), 158–163. https://doi.org/10.18311/jbc/2016/15596

Issue

Volume 30, Issue 3, September 2016

Section

Research Articles
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Scopus
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Europe PMC

 

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