Tumaini (CRT) Inc. Efficacy of a New Slow Release Mosquito Larvicide containing Novaluron SLOW RELEASE MOSQUITO LARVICIDE DETAILS Larvicide contains the active ingredient novaluron and utilizes novel formulation technology which has been patented in numerous countries Formulation controls rate of release of novaluron into water column increases solubility of novaluron in water from 3 ppb to 10-15 ppb Formulation also promotes dispersion of novaluron throughout the water column products will be available in several different sizes and shapes to address different market needs all products have same recipe and ai 1.2g/kg novaluron Tradename for larvicide products are: Mosquiron 0.12P and Mosquiron 0.12CRD MOSQUIRON PRODUCT DETAILS Mosquiron 0.12P pastilles (2 sizes) Mosquiron 0.12CRD controlled release device MOSQUIRON PRODUCT DETAILS Mosquiron 2010 Field Trials PURPOSE: Assess efficacy and duration of Mosquiron products when used under simulated field conditions and in different regions of the US and Canada Mosquiron 2010 Field Trials Experimental Design Needed to take into consideration the mode of action of novaluron Novaluron is a chitin synthesis inhibitor and effects can be cumulative; larvae can appear healthy and mortality may not be observed until adults emerge from pupal case At high concentrations of novaluron (>5 ppb) effect on larvae can be rapid – 24 hours Mortality can still occur at pupal eclosion caused by incomplete separation from pupal case – adult drowning Field Trial Locations Canada – Portage la Prairie MB, Abbotsford BC US – Marshall WI, Meansville GA, Panama City FL Two non-treated checks were included in the experiment, and ALTOSID XR-Briquettes (active ingredient: (S)Methoprene) were also tested as a positive control. ALTOSID XR-Briquettes (EPA Registration No.: 2724-421) were purchased from Central Life Sciences. Mosquiron 2010 Field Trials Experimental Design Table 1. Products and Rates Tested Treatment Number Treatment Name Amount/ Type of Formulation Minimum Amount of Water (L) added 1 Control-A 0 200 Type of Organic Matter * Mosquito food only Sod grass & 2 Control-B 0 200 mosquito food Sod grass & 3 Positive Control 1 Altosid XR Briquette 200 mosquito food Sod grass & 4 Pastille 0.5X 20 grams of pastilles 200 mosquito food Sod grass & 5 Pastille 1X 40 grams of pastilles 200 mosquito food Sod grass & 6 Pastille 2X 80 grams of pastilles 200 mosquito food 7 CRD 0.5X ½ CRD** 200 Mosquito food only 8 CRD 1X 1 CRD 200 Mosquito food only 9 CRD 2X 2 CRDs 200 Mosquito food only * The FL-1 site utilized existing concrete tanks with soil and vegetation established in the bottom of the tanks for Treatments 2 through 6. ** CRDs were cut in half for the 0.5X rate. Galvanized metal tanks (approximate capacity of 250 liters) were used at all sites except FL-1. The FL-1 site utilized permanent concrete tanks. For treatments 2 through 6, a Mosquiron Table 3. Mosquito Egg Sources and2010 Genera Field Trials Trial No. Egg Source Genera BC-1 From wild mosquitoes laying eggs in small artificial pools. Culex spp. FL-1 Reared and harvested by Ken Shaffer at the Public Health Entomology Research and Education Center, Panama City, FL Culex quinquefasciatus GA-1 Reared and harvested by Steve Sackett, New Orleans Mosquito and Termite Control Board (NOMTCB). Aedes aegypti MB-1 From wild mosquitoes laying eggs in small artificial pools. Culex spp. WI-1 From wild mosquitoes laying eggs in small artificial pools. Culex restuans and Culex pipiens Mosquiron 2010 Field Trials Experimental Design Eggs were introduced to treatment tanks approx . every 2 weeks Culex eggrafts were placed directly on water surface at WI, MB, BC and FL sites Once hatching occurred all trts. received a larval liquid food slurry Food slurry was a standard formula consisting of liver powder/brewer’s yeast Food administered 3-4 times/wk. until water was cloudy in appearance Mosquiron 2010 Field Trials Marshall - WI site Meansville - GA site Mosquiron 2010 Field Trials Panama City -FL Site Mosquiron 2010 Field Trials Portage la Prairie - MB Site Mosquiron 2010 Field Trials Abbotsford - BC Site Mosquiron 2010 Field Trials Data Collection Treatments were inspected for the presence of live larvae and/or pupae on an as needed basis. Once 3rd and/or 4th instars were present, dips were taken to harvest live larvae. Florida A&M’s PHEREC Standard Mosquito Sampling Method was used at all trial sites. Using a standard mosquito dipper, eight dips were taken per treatment. The number of larvae and/or pupae per dip were counted and recorded. Larvae were returned to the treatment tanks. Once pupae were found, they were transferred to emergence jars for monitoring. Adults that emerged successfully from pupal cases were counted and recorded as successful hatches. Dead adult mosquitoes on the water surface recorded as unsuccessful emergence. Observations Using local sources for harvesting Culex eggrafts delayed start of trial in Northerly sites to early July Was exacerbated by a cool wet spring in Canada and WI FL location received very high precipitation (18” rain in July) causing significant dilution of novaluron in cement troughs Conclusions Study results demonstrate Mosquiron formulations provided 100% IE for duration of study at all locations 100% IE observed at FL site with 2x CRD