Cabbage Maggot Resistance to Aldrin in Ontario

• Published in: Journal of Economic Entomology
• Main Author: Niemczyk, H. D.
• Format: Text
• Language: English
• Published: Oxford University Press 1965
• Subjects: Scientific Notes; Newfoundland
• Online Access: http://jee.oxfordjournals.org/cgi/content/short/58/1/163; https://doi.org/10.1093/jee/58.1.163

Aldrin used as a spray, broadcast, or granular band treatment successfully controlled the cabbage maggot, Hylemya brassicae (Bouché), in Ontario for at least 5 years. However, in September 1963, rutabaga growers in certain areas began reporting extensive damage in spite of aldrin sprayed at the rate of 25 lb actual per acre and broadcast applications of 100 lb 5% aldrin granular per acre. A similar sequence of events was reported by Howitt and Cole (1962) in Washington, Coaker et al. (1963) in Great Britain, and Morris (1963) in Newfoundland. In all cases when resistance first appeared it was not general, but confined to certain areas. In Ontario the problem appeared in widely scattered areas and only where broadcast applications of aldrin had been used extensively.