ABSTRACT
Six flit-gun sprayers were tested for possible use in mosquito adulticide programs where inexpensive nonmotorized application technology may be required. An analysis of variance for differences in droplets < or = 24 microns (mu), droplets > or = 48 mu, droplets/cm2, volume median diameters, and mosquito mortality is provided. As shown by these data, good results can be achieved with this equipment.
Subject(s)
Mosquito Control/instrumentation , Pyrethrins/administration & dosage , Analysis of Variance , Evaluation Studies as Topic , SoftwareABSTRACT
Six flit-gun sprayers were tested for possible use in mosquito adulticide programs where inexpensive nonmotorized application technology may be required. An analysis of variance for differences in droplets ≤ 24 microns (µ), droplets ≥ 48 µ, droplets/cm2, volume median diameters, and mosquito mortality is provided. As shown by these data, good results can be achieved with this equipment.
Se pusieron a prueba seis atomizadores de compresión activados a mano a fin de evaluar su utilidad para programas de exterminio de mosquitos adultos en que se necesiten tecnologías no motorizadas de bajo costo. Se hace un análisis de la varianza en cuanto a partículas ≤ 24 y ≥ 48 micras (µ), partículas/cm2, diámetro del volumen mediano, y número de mosquitos muertos. Los datos confirman que pueden obtenerse buenos resultados con aparatos de este tipo.
Subject(s)
Mosquito Control/instrumentation , Pyrethrins/administration & dosage , Analysis of Variance , Evaluation Studies as Topic , SoftwareSubject(s)
Mosquito Control , Pyrethrins , Analysis of Variance , Software , Evaluation Studies as TopicABSTRACT
A Southwest Electrostatic Sprayers, Inc., nozzle was configured to a Hudson PortaPak backpack. A test was run to compare deposition of BVA no. 13 oil by the electrostatic nozzle to a standard nonelectrostatic nozzle as collected by Teflon slides. Results indicate that 100% greater deposition occurred with the electrostatic nozzle.
Subject(s)
Mosquito Control/instrumentationABSTRACT
The effects of temperature and flow rate on mass median diameters (mmds) of thermally generated aerosol clouds were studied. Number 2 fuel oil alone, undiluted and diluted malathion 91, and undiluted naled were examined. There was a significant flow rate x temperature interaction on the mmds of diluted malathion fogs: i.e., differences among flow rates depended on temperature and vice versa.
Subject(s)
Malathion/analysis , Mosquito Control/methods , Naled/analysis , Aerosols , Particle Size , TemperatureABSTRACT
The study examines malathion aerosol cloud behavior in a North Florida pine flatwoods. Droplet mass median diameters (MMD) decreased over distance in both open and pine flatwoods. A sharp decrease in number of aerosol droplets per cm2 occurred between 3.1 and 15.2 m and a gradual decline in droplets per cm2 occurred beyond 15.2 m in both treatment areas. There were no interactions between habitat and distance in regard to MMD or droplets per cm2. Analysis of variance models accounted for 82% of the variability in the MMD data and 79% of the variability in the number of droplets per cm2.
Subject(s)
Aerosols , Ecology , Malathion , Mosquito Control/methods , Florida , Regression AnalysisABSTRACT
The degradation of malathion, undiluted and diluted with No. 2 fuel oil, in thermally generated aerosol clouds was examined at selected temperatures ranging from 121 to 566 degrees C. Undiluted malathion residues decreased from 1.76 to 0.21 micrograms/ml over this range of temperatures. Malathion diluted with fuel oil decreased from 0.14 to 0.02 microgram/ml as the temperature was increased 288 to 510 degrees C.
