Efficacy of fenoxycarb (Pictyl) against Psorophora columbiae in Arkansas ricefields.

The IGR, fenoxycarb was effective against mosquitoes in both small rice plots and commercial ricefields in southeast Arkansas at the rate of 10 g AI/ha. It adequately controlled Psorophora columbiae populations. This compound shows excellent promise as a tool in effective IPM schemes against Ps. columbiae larvae in Arkansas rice fields by acting as a direct control, and possibly by indirectly increasing their vulnerability to natural controls.

Preliminary data on use of the inland silverside, Menidia beryllina, to control mosquito larvae.

A study of procedures for spawning and culture of the inland silverside, Menidia beryllina, was conducted. The efficacy of young Menidia, 20 to 22 and 31 to 33 days old, to control mosquito larvae was determined in the laboratory with first and second larval instars of the saltmarsh mosquito Aedes taeniorhynchus. Feeding trials were run at salinities of 1, 5, 15 and 25%. Field trials were also conducted to determine if Menidia would effectively control Culex quinquefasciatus in brackish water impoundments.