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在实验室采用倍硫磷软木块缓释剂控制小型积水蚊幼虫的残效期试验表明:每块软木块重0.5g,用50％倍硫磷1g,每周换水一次组,残效期20周;不换水组残效期44周。
In the laboratory using fenton PC block slow-release agent control small mosquito larvae residual period test showed that: each cork weight 0.5g, with 50% fenthion 1g, water once a week group, residual 20 Weeks; no water change group residual validity of 44 weeks.