. Agri-news. Agriculture. September 8, 1975 FOR IMMEDIATE RELEASE ALBERTA FLY CONTROL EXPERIMENT An experiment carried out at the Alberta Plant Industry Laboratory has shown that a number of common insecticides can be used to kill house flies while they are still in the larval stage. Under the direction of the head of the laboratory's entomology section, Hugh Philip, the exper- iment was initiated in an attempt to find a practical way of controlling flies in Alberta feedlots. The feedlots make an ideal breeding area for flies in the early summer because of the difficulty of getting rid of the
. Agri-news. Agriculture. September 8, 1975 FOR IMMEDIATE RELEASE ALBERTA FLY CONTROL EXPERIMENT An experiment carried out at the Alberta Plant Industry Laboratory has shown that a number of common insecticides can be used to kill house flies while they are still in the larval stage. Under the direction of the head of the laboratory's entomology section, Hugh Philip, the exper- iment was initiated in an attempt to find a practical way of controlling flies in Alberta feedlots. The feedlots make an ideal breeding area for flies in the early summer because of the difficulty of getting rid of the manure in the spring. Unless control measures are taken,the house fly population in these areas is enormous by the end of the summer. In addition to sanitation, methods of controlling flies in the past have been aimed at the adult fly. However, they have not proved very satisfactory because there are always new generations of flies on the way before the adults have been eliminated. The insecticides which Mr. Philip used in his experiment were dimethoate, ronnel, propoxur and the insect growth regulator TH-6040. All four products did an equally effective job of killing the larvae in the treated manure. It was also found that under laboratory conditions the manure remained toxic enough to kill newly introduced larvae for as long as five weeks after it had been sprayed. Mr. Philip is planning to carry out further tests with TH-6040 to find out whether it will control other insects of significance to agricultural production. The advantage of this product over the commonly used insecticides is that it is specific to insects and is harmless to mammals, fish and birds. It kills the insect by interrupting its life cycle at the pupal stage, thereby preventing the adult from emerging. In the United States insect growth regulators have been experimentally fed to cattle to control face, horn and house flies in the manure. To date results have been verv promising and there have been no appa
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