Objective: To determine which method of topical fluoride application could make the enamel uptake more fluoride.
目的：测定应用氟化物的不同方法对釉质吸收氟离子的影响。
The relative susceptible toxicity baselines of S. exigua to major insecticides in the laboratory condition were established with topical application and leaf dipping method.
分别采用点滴法和浸叶法对甜菜夜蛾相对敏感品系进行毒力测定，建立常用杀虫剂的敏感毒力基线。
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