Effectiveness of Aerosol Formulations Containing Methoxychlor and Other Insecticide-Repellents against Biting Flies on Cattle, and Analyses of Milk from Treated Animals1

Publisher Website
Google Scholar
Abstract
Aerosol containers charged with 1, 2, and 4% of methoxyehlor in various combinations with N,N-diethyl-m-toluamide, Thanite® (isobornyl thiocyanoacetate-82%), MGK R-326 (di-m-propyl isocinchomeronate), pyrethrins, and other ingredients were released on lactating cows by means of an automatic photoelectric device. The major components of the device consisted of a rectangular-shaped wooden frame on which were mounted a photoelectric relay unit and a triggering mechanism. Three aerosol containers were strategically located on the frame. The aerosol spray was released instantly as cattle entered the frame and stopped as soon as they left. On the average, actual spraying time per animal was 1.5 seconds; 150 animals were treated by a set of three 12-ounce containers, a dosage of approximately 7 ml. being discharged on each animal. The spray was applied once daily. Milk from both treated and untreated cows Was collected and analyzed once or twice a week. Results of the tests made over a period of 14 weeks showed that the aerosol formulations gave consistently excellent control of the horn fly, Siphona irritans (L.), but. limited protection against the stable fly, Stomozys calcitrans (L.). None of the milk samples analyzed showed a detectable amount of methoxychlor. The current price for the parts of the automatic device was between 20 and 25, and the base cost of the containerws and aerosol ingredients averaged between 0.6 cent and 1 cent per animal per application.

This publication has 0 references indexed in Scilit: