目的 研究能有效防治白蚁的盐土种类和浓度。方法 采用不同种类、不同浓度的盐土, 对白蚁进行阻杀、致死和抗穿越效果实验。结果 由粗盐、细盐和混合盐制成的盐土对白蚁均具有一定的阻杀效果, 其阻杀效果与实验浓度呈正相关趋势, 混合盐效果最差;台湾乳白蚁和黑翅土白蚁在0.4%及以上浓度的盐土中100%死亡的平均时间分别在25.33 d和5.67 d以下;台湾乳白蚁在浓度为0.4%的盐土中平均修筑了28.47 cm长的蚁路, 最终因接触盐土而死亡。结论 盐土对白蚁具有一定的阻杀、致死效果和抗穿越能力, 其中粗盐和细盐对白蚁的阻杀效果优于混合盐, 阻杀效果的好坏与土中盐的浓度有关, 0.4%浓度的盐土对白蚁具有较好的致死效果和抗穿越能力。

Objective To study the type and concentration of saline soil that can effectively control termites. Methods Experiments were performed to investigate the retarding, lethal, and anti?penetrating effects of different types and concentrations of saline soil on termites. Results The saline soils prepared from coarse salt, fine salt, and mixed salt retarded the invasion of termites, and the retarding effect was positively correlated with the concentration of salt in soil; among the three saline soils, what was prepared from mixed salt had the worst effect. In the saline soil with a concentration of at least 0.4%, all individuals of Coptotermes formosanus and Odontotermes formosanus died, on average, within 25.33 d and 5.67 d, respectively. In 0.4% saline soil, C. formosanus workers built an average 28.47 cm long tunnel and finally died from exposure to saline soil. Conclusion Saline soil has retarding, lethal, and anti?penetrating effects on termites. The saline soils prepared from coarse salt and fine salt have a better retarding effect on termites than that prepared from mixed salt, and the retarding effect is positively correlated with the concentration of salt in soil. Moreover, 0.4% saline soil has good lethal and anti?penetrating effects on termites.