title: Efficacy studies of Aquaprene (emulsifiable concentrate and wettable powder) insect growth regulator formulations against third- and fourth-stage larvae of Ochlerotatus taeniorhynchus in small-plot field studies.
abstract: Efficacy studies were conducted with Aquaprene emulsifiable concentrate (EC) (33.6% active ingredient [AI]) and wettable powder (WP) (40% AI) (S)-methoprene insect growth regulator formulations against larval Ochlerotatus taeniorhynchus in small field test plots. Aquaprene EC was applied at 7.18 and 9.57 g/acre. Approximately one thousand 4th-stage larvae were added to each plot before treatment, and 24 h later pupae were collected to determine emergence inhibition. At both applications rates, Aquaprene EC was extremely effective (99%) at significantly reducing adult emergence in the studies. Two application rates ((S)-methoprene at 2.4 and 4.8 g/acre) of the Aquaprene WP also were evaluated against Oc. taeniorhynchus at 1, 3, 7, and 14 days after treatment. Emergence inhibition and statistical analysis showed that significant differences were found between the (S)-methoprene rates of 2.4 and 4.8 g/acre at each posttreatment assessment. The (S)-methoprene rate of 4.8 g/acre was effective in controlling adult emergence for up to 14 days after treatment.
authors.affiliation: John A. Mulrennan, Sr., Public Health Entomology Research and Education Center, College of Engineering Sciences, Technology and Agriculture, Florida Agriculture and Mechanical University, 4000 Frankford Avenue, Panama City, FL 32405-1933, USA.
authors.forename: T G
authors.initials: TG
authors.lastname: Floore
authors.forename: J L
authors.initials: JL
authors.lastname: Petersen
authors.forename: K R
authors.initials: KR
authors.lastname: Shaffer
mesh_terms: D000818:Animals; D004655:Emulsions; D007605:Juvenile Hormones; D007814:Larva; D008726:Methoprene; D009032:Mosquito Control / Q000379:methods*; D044969:Ochlerotatus; D011208:Powders
chemical_list: D004655:Emulsions; D007605:Juvenile Hormones; D011208:Powders; D008726:Methoprene