Objective To determine the f i eld efficacy of the mixed baits of anticoagulant rodenticides Diphacinone Na-sa lt and Bromadiolone in low concentration against rodents.

[Methods] Poison baits were put in different sites of the sewers, the rate of bait expending a week later were observed.

The results of selective and nonselective intake tests on farm rats and home rats with Bromchlophos 0 05 g/L of different baits showed that farm rats like to eat poison baits made of rice and wheat,their average intake rate were 23.

Analysis on the efficacy of killing rats with brodifacoum poison bait in field;

Efficacy of three kinds of poison baits against Blattella germanica in laboratory;

Efficacy of a new poison bait against Blattella germanica;

005% difethialone gel bait for 15 days.