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我们在开展群众性灭蚊过程中,对本地区生长较多的二十六种野生植物的灭蚊虫效果进行了初步观察。现把效果较好的泡桐、蓖麻、棟树、桃树、烟叶等五种植物的效果介绍如下: 一、方法 1.配制方法:上述五种野生植物除烟叶用干梗外,其余都用鲜叶。浸液:毎一种取10克叶(梗)切碎各浸于400毫升水中24小时,取过滤液,即成2.5%浸液。
In carrying out the mass anti-mosquito process, we conducted a preliminary observation on the mosquito-killing effect of 26 wild species growing in the region. Now the effect is better Paulownia, castor, building trees, peach trees, tobacco and other five kinds of plant effects are as follows: First, the method 1. Preparation methods: The above five kinds of wild plants in addition to the stem with tobacco leaves, the rest are used Fresh leaves. Immersion: 毎 a take 10 grams of leaves (stem) chopped each immersed in 400 ml of water for 24 hours, take the filtrate, Serve 2.5% immersion.