Abstract
The effectiveness of slow-release formulations (SRF) of two Insect Growth Regulators Altosid XR-briquets and Dudim tablets against the house mosquito larvae of Culex pipiens was evaluated. The result showed that, the treatment with Altosid XR-briquets and Dudim tablets against mosquito larvae reared in tap water containers gave effective control of about 90-100% adult emergence inhibition for 67 and 86 days post-treatment, respectively. These calculated times indicated that, Dudim tablets proved to be more effective against C. pipiens larvae than Altosid XR-briquets by about 1.3 times. On the other hand, the data showed that, treatment with Altosid XR-briquets and Dudim tablets against mosquito larvae reared in pond water containers began to lose their effective control after 37 and 62 days, post treatment respectively. This means that, larval treatments with the both SRFs formulations in pond water induced a decrease in the durations of effective control against mosquito larvae of C. pipiens by about 1.8 and 1.4 times as compared with larval treatments in the tap water containers.