The beito medicine for the mosquito which is effective to the extermination of the mosquito is offered. Boracic acid and/or the water liquid which that salt melts the beito medicine for the mosquito which impregnation it could point in the feeding base substance. As for the aforementioned water liquid, furthermore, it is desirable at least to contain the chemical compound of 1 where it is selected from hexose, sugar alcohol and the group which consists of two sugars kinds. In addition, as for the material of the aforementioned feeding base substance it is desirable to be the pulp.蚊の駆除に有効な蚊用ベイト剤を提供する。ホウ酸および/またはその塩が溶解した水性液を摂食基体に含浸させた蚊用ベイト剤。前記水性液は、さらに、ヘキソース、糖アルコールおよび二糖からなる群から選択される少なくとも1種の化合物を含有することが好ましい。また、前記摂食基体の素材はパルプであることが好ましい。
