Host spectrum, reproduction, and survival of Neochetina eichhorniae (Coleoptera: Curculionidae) - A potential natural enemy for controlling water hyacinth (Eichhornia crassipes)
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Abstract
Neochetina eichhorniae (Coleoptera: Curculionidae) is a natural enemy of water hyacinth and its morphology as well as biology has been investigated previously. In this study, the host range of N. eichohorniae was examined using the following 7 groups of plants: Pontederiaceae (water hyacinth, Eichhornia crassipes; hastate-leaf pondweed, Monochoria hastata); food crops (rice, Oryza sativa; maize, Zea mays; sweet potato, Ipomoea batatas and cassava, Manihot esculenta); vegetables (cucumber, Cucumis sativus; mustard greens, Brassica juncea; turnip, Raphanus sativus; water spinach, Ipomoea aquatica; pepper elder, Peperomia pellucida; cabbage, Brassica oleracea var. capitata); herbaceous (boat lily, Tradescantia discolor, gotu kola, Centella asiatica, purple-heart, Tradescantia pallida); fruits (mango, Mangifera indica; longan, Dimocarpus longan; rambutan, Nephelium lappaceum); water plants (sacred lotus, Nelumbo nucifera; red water lily, Nymphaea rubra, yellow bur-head, Limnocharis flava) and industrial plants (sugarcane, Saccharum ssp.; peanut, Arachis hypogaea). The N. eichohorniae was found to be the only survivor that developed and completed its life cycle on water hyacinth. The N. eichohorniae caused only minimal damage to hastate-leaved pondweed and its life cycle was not completed on this weed. When fed with water hyacinth, N. eichohorniae female produced 358.9 eggs on average and the egg-laying period was 16 weeks. Forty three percent of eggs were laid from the 5th to the 8th weeks after females emerged from cocoons. The hatch-ability of N. eichohorniae eggs was 75.2% and 66.8% of the larvae could survive and became pupae. Approximately 79.1% of the pupae emerged as adults. Among the adults, the female ratio was 48.7%. These results indicated that N. eichohorniae could be considered as a natural enemy to be used for biological control of water hyacinth.
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References
DeLoach, C. J., & Cordo, H. A. (1976). Ecological studies of Neochetina bruchi and N. eichhorniae on water hyacinth in Argentina. Journal of Aquatic Plant Management 14, 53-59.
Fayad, Y. H., Ibrahim, A. A., El-Zoghby, A. A., & Shalaby, F. F. (2000). Ongoing activities in the biological control of water hyacinth in Egypt. In Julien, M. H., Hill., M. P., Center, T. D. and Jianqing, D. (Eds). Proceedings of the Second Meeting of the Global Working Group for the Biological and Integrated Control of Water Hyacinth. Beijing, China: ACIAR.
Gopal, B. (1987). Water hyacinth (Aquatic plant studies). Amsterdam, The Netherlands: Elsevier Science.
IITA (International Institute for Tropical Agriculture). (2000). IITA annual report 2000. Ibadan, Nigeria: IITA.
Julien, M. H. (2000). Biological control of water hyacinth with arthropods: a review to 2000. In Julien, M. H., Hill., M. P., Center, T. D. and Jianqing, D. (Eds). Proceedings of the Second Meeting of the Global Working Group for the Biological and Integrated Control of Water Hyacinth. Beijing, China: ACIAR.
Julien, M. H., Griffiths, M. W., & Wright, A. D. (1999). Biological control of water hyacinth. The weevils Neochetina bruchi and N. eichhorniae: biologies, host ranges and rearing, releasing and monitoring techniques for biological control of Eichhornia crassipes. Canberra, Australia: Australian Center for International Agricultural Research.
Le, K. H., Nguyen, D. T., & Dang, T. A. (2016). Morphological and biological characteristics of the beetle Neochetina echohorniae - A potential natural enemy to control water hyacinth. Journal of Agriculture and Rural Development 2, 55-61.
Moorhouse, T. M., Agaba, P., & McNabb, T. J. (2001). Recent efforts in biological control of water hyacinth in the Kagera River headwaters of Rwanda. In Julien, H., Hill., M. P., Center, T. D. and Jianqing, D. (Eds). Proceedings of the Second Meeting of the Global Working Group for the Biological and Integrated Con- trol of Water Hyacinth. Beijing, China: ACIAR.
Nguyen, D. V. (1993). Medicinal plants of Vietnam, Cambodia, and Laos. California, USA: Mekong Printing.
Njoka, S. W. (2004). The biology and impact of Neochetina weevils on water hyacinth, Eichhornia crassipes in Lake Victoria Basin, Kenya (Unpublished doctoral dissertation). Moi University, Uasin Gishu County, Kenya.
Perkins, B. D. (1973). Arthropods that stress water hyacinth. Proceedings of the Third International Symposium on Biological Control of Weeds (49 - 52). Montpellier, France: CSIRO.