THE EFFECT OF CHLOROPHOS AND TEMPERATURE ON THE RESPIRATORY RHYTHM OF FLIES
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
The tests on female and male Musca domestica L., Calliphora uralensis Vill. and C. erythrocephala Mg. showed that chlorophos, both during the contact and fumigant method of application, changed the respiratory rhythm of files in the direction of lengthening the periods of ventilation of the tracheal system. It is proposed that the death of flies following chlorophos poisoning is promoted by the prolonged opening of the spiracles, ensuring a better entry of the insecticide through the tracheal system, and also the dehydration of the flies from the loss of water. In female C. uralensis following an increase of the surrounding air temperature up to 30 degrees, the periods of ventilation of the tracheal system are reduced, which may be evaluated as a protective adaptation for enduring unfavorable conditions of the external environment. In males of this species in a temperature of 30 degrees the periods of ventilation are extended, and consequently this adaptation is absent.
- Anatomy and Physiology