Abstract:

Objective This experiment used Coptotermes formosanus Shiraki as selected insect to find suitable preservatives and its optimum concentration in termite artificial bait. Methods The experiment compared the mildew- proof effect of four preservatives, Sodium benzoate, Potassium sorbate, Citral and Propylparaben on termite artificial bait outdoor, and took choice-feeding and no-choice-feeding experiments to compare the effect of Sodium benzoate, Potassium sorbate, and Propylparaben on the termite feeding if added into the bait. Results The addition of Citral did not efficiently affect the mildew of the bait, while other three preservatives inhibited the mildew efficiently; the heavy feeding by termites on baits that contained 0.05% Sodium benzoate, 0.1% Potassium sorbate and 0.025% Propylparaben were 0.45, 0.28, 0.34 g, and all had no effect on the termite survival rate. Conclusion The 0.05% sodium benzoate is the most suitable preservative for termite artificial bait.

Key words: Coptotermes formosanus, Termite bait, Mildewproof effect

摘要：

目的 以台湾乳白蚁为供试昆虫,研究适合白蚁人工饵料的防腐剂种类及其适宜浓度。方法 通过室外试验比较了苯甲酸钠、山梨酸钾、柠檬醛和尼泊金丙酯4种防腐剂对白蚁人工饵料的防霉变效果;通过白蚁强迫性取食和选择性取食试验,比较了饵料中分别添加苯甲酸钠、山梨酸钾和尼泊金丙酯对台湾乳白蚁取食的影响。结果 柠檬醛的添加并未对饵料的霉变程度产生显著作用,而其他3种防腐剂对饵料的霉变程度产生了显著的抑制作用;其中台湾乳白蚁对含0.05%苯甲酸钠、0.1%山梨酸钾和0.025%尼泊金丙酯饵料的取食量分别为0.45、0.28和0.34 g,并对白蚁的存活率无显著影响。结论 0.05%的苯甲酸钠最适合作为白蚁人工饵料的防腐剂。

关键词: 台湾乳白蚁, 白蚁饵料, 防霉效果