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The attractiveness of different components of Laminaria to Oncomelania hupensis

Objective To evaluate the attractiveness of main components isolated and extracted from of Laminaria and applied them as the attractive baiting agents in molluscicides to enhance the killing effect of molluscicides. Methods A series of experiments using the attractant extracts of different main components of Laminaria were conducted at different temperatures and humidity conditions. Results The initially identified attractants in Laminaria were dietary fiber and fucoidan. At 25 ℃,the 48 h Oncomelania hupensis-attracting rates of dietary fibers and fucoidan were 79.33% and 56.33%,respectively,higher than those at 15 ℃ and 35 ℃; under 60% relative humidity,the 48 h O. hupensis-attracting rates of fucoidan and dietary fibers were 47.67% and 72.33%,respectively,higher than those under 30% relative humidity. Conclusion The dietary fibers in Laminaria,which had a favorably attracting effect on O. hupensis,were a valuable material worth exploitation and utilization.