The apple snail, Pomacea canaliculata has made a tremendous threat to aquatic agricultural crops for many years. But safe and effective methods to eliminate them are still not available. Traditionally, pesticides are the most common way to kill apple snails. However, the occurrence of drug resistance and drug residual causes even more serious problems. The present study was conducted to evaluate the effectiveness of attractants to apple snails in the fields. The experiments included the effectiveness of different attractants and trap designs under different environmental conditions. It was found that attractants of banana pulp, chicken blood and condensed fish soluble were effective with at least 12-hour trapping time. The sizes of attracted snails were similar to the ambient snails. Snails (Pomacea scalaris, Sinotaia quadrata, Planorbioidae spp.), insects (Sphaerodema rustica, water scorpion),tadpole and fishes (Poecilia reticulate, Trichogaster trichopterus) were also found in the traps. Besides, two-opening traps with funnel entrance were more effective than the traps without funnel entrance. In general, in still water with ambient density of apple snails range from 6.2¡Ó 6.1 to 50.3¡Ó14.2 individual/m2,the relationship between attracted snails and ambient snail density was negative in chicken blood group (p < 0.001), positive in condensed fish soluble (p < 0.05) and no trend in banana group (p > 0.05). The results support the hypothesis that areas with abundant food usually have high snails density and those snails are less attracted by potential food items.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0804109-120939 |
| Date | 04 August 2009 |
| Creators | Sun, Wei-jhen |
| Contributors | Jiun-Hong Chen, Li-Lian Liu, Yuh-Wen Chiu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-120939 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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