Impact of seasonal variation on population of weevils (Neochetina spp)

The impact of seasonal variation on population of weevils (Neochetina Spp), commonly used as water hyacinth bio-control agent was carried out in the National Institute for Freshwater Fisheries Research water-hyacinth insect laboratory. The experiment was conducted between May 2006 and April, 2007. Ten plastic containers of 50cm depth, 60cm diameter and 20-litre capacity each filled with 16- litters of water and 20 bunches of water hyacinth were used for the experiment. Ten weevils made up of five male and five female were introduced into each of the plastics container. The weevils were monitored daily, their numbers recorded. The result showed that, during wet season (May to October) the population of weevils increased, while it decreased during the dry season (November to April). Data analysis showed that, there was significant difference between wet season and dry season (P<0.05).

Bibliographic Details

Main Authors:	Owotunse, S., Daddy, F., Brinin-Yauri, A.Y., Mohammed, H.A.
Format:	conference_item biblioteca
Language:	English
Published:	FISON 2008
Subjects:	Biology, Neochetina spp., Nigeria, Weevils, freshwater environment, Seasonal variations, Population dynamics, Aquatic insects,
Online Access:	http://hdl.handle.net/1834/37983
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