The Frommer Updraft Gravid Trap Model 1719 operates in a fashion similar to the CDC Gravid Trap (Model 1712) by creating an upward current of air from within the confines of the oviposition pan, so that the mosquitoes are drawn into the unit during their pre-oviposition examination of the medium.

• The chief advantage of the 1719 over the 1712 trap is that the Frommer version has a collection chamber below the fan and the adults are not exposed to the aspiration fan; the result is pristine specimens that are easy to identify.
• This trap was developed and evaluated with the aid of Dr. Robert Frommer of the Manatee Mosquito Control District of Florida.

The Improved Frommer Updraft Gravid Trap showing the screened collection cup and mounting bench. Remember to leave the trap running and the cup inserted into the aspiration housing until the lid is attached to the collection cup.

Oviposition Attractant and Site Selection

The hay infusion is made by adding 1 lb (0.5 kg) of hay to 30 gal (114 liters) of tap water, and allowing the infu­sion to incubate for 5 or more days; see references for a slightly different Culex formulation. The trap is placed at the desired collection site at least one hour before sunset and the pan is filled to a depth of 1″ such that the level of infusion solution is near the 4 notches on the black powder coated base or bench. Captured mosquitoes are removed early the following morning to ensure maximum survival of the insects and any virus that may by present. New medium is used each night.

Included Items

The Frommer Updraft Gravid Trap Model 1719 includes:

• Trap
• Two regular mesh stainless steel collection cups with lids
• Power Cable
• Oviposition Pan
• Instructions

Requirements

• The trap draw is 0.125 Amps/hour at 6 volts.
• Requires a 6 volt, 12 amp DC battery; this size of battery would run the trap continuously for 72 hours. See the batteries and chargers product page for options.