Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.

Ayyaru Gopalakrishnan; Mayalagu Rajkumar; Jun Sun; Ajay Parida; Balu Alagar Venmathi Maran

doi:10.1007/s00343-011-0101-z

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Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.

OriginalPaper | Updated：2023-05-16

- Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.
- Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.
- 海洋湖沼学报（英文） 2011年29卷第1期页码：162-166
- Affiliations：
  
  1. Centre of Advanced Study in Marine Biology Annamalai University
  2. Institute of Oceanology Chinese Academy of Sciences
  3. . S. Swaminathan Research Foundation Institutional Area,M
  4. Takehara Marine Science Station Graduate School of Biosphere Science Hiroshima University
- Author bio：
- Funds：
  
  Supported by the Chinese Academy of Sciences Research Fellowship for International Young Researchers to M. Rajkumar hosted by J. SUN, and the Knowledge Innovation Project of the Chinese Academy of Sciences (Nos. KZCX2-YW-QN-205, KZCX2-YW-213-2) to J. SUN
- DOI：10.1007/s00343-011-0101-z
  中图分类号：
- 网络首发：2011-01-15，
  
  纸质出版：2011
- Accepted：
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Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.[J]. 海洋湖沼学报（英文）, 2011,29(1):162-166.

Gopalakrishnan, A., Rajkumar, M., Sun, J. et al. Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.., Chin. J. Ocean. Limnol. 29, 162–166 (2011). https://doi.org/10.1007/s00343-011-0101-z
Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.[J]. 海洋湖沼学报（英文）, 2011,29(1):162-166. DOI： 10.1007/s00343-011-0101-z.

Gopalakrishnan, A., Rajkumar, M., Sun, J. et al. Integrated biological control of water hyacinths, Eichhornia crassipes by a novel combination of grass carp, Ctenopharyngodon idella (Valenciennes, 1844), and the weevil, Neochetina spp.., Chin. J. Ocean. Limnol. 29, 162–166 (2011). https://doi.org/10.1007/s00343-011-0101-z DOI：

摘要

Abstract

The efficacy of grass carp Ctenopharyngodon idella (Cyprinidae) and weevils Neochetina spp. (Curculionidae) to control the aquatic weed

water hyacinth

is investigated in a square net cage (happas) setting at a farm in Cuddalore District

South India. This novel combination of insects and fish is found to be superior to individual treatments for controlling the weed growth within 110 d. The biomass of the weed

number of plants

percentage of flowered plants and chlorophyll contents were studied. The weed biomass is reduced from 5 kg (day 1) to 0.33 kg (day 110) when exposed to grass carp and weevils. The number of plants is reduced to 0.75 in grass carp and weevil exposed happas

while it is 741.5 in the control. The mean number of leaves per plant is also reduced. In addition

the chlorophyll a and b are significantly reduced in happas exposed to the combination of fish and insects when compared to the other treatments. Based on the results of this study

we consider the combined use of grass carp and weevils to be more efficient and sustainable for managing water hyacinths than the use of these organisms individually.

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references

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