Summary of Losses from Insect Damage and Costs of Control in Georgia - 1997

IV. Canola

G. D. Buntin, R. D. Hudson, and J. N. All

Canola, Brassica napus, is a winter field crop being grown as an oilseed crop. All production is contract production of Laurate canola and is grown in the Coastal Plain region. Acreage in 1996/1997 was about 6,600 acres in Georgia with total acreage in the southeast being about 16,000 acres. Grain yield averaged 28 bu/acre (1400 lb/acre) and had a market price of $8.00/bu.

Three species of aphids (turnip, green peach, and cabbage aphids) occur in canola. Aphids, primarily turnip aphid, were an economic problem in most fields. Fields were treated once in the seedling or rosette stage with methyl parathion at the rate of 0.5 lb (AI)/acre. The cabbage seedpod weevil, Ceutorhynchus assimilis, also can damage canola but this insect only occurs in the piedmont region. However, canola is not grown commercially in the piedmont region anymore, consequently cabbage seedpod weevil is no longer listed as a pest of canola.

Estimates of Losses and Control Costs

¹Includes turnip, green peach, and cabbage aphids.

Information Pertaining to Control of Major Canola Insect Pests in Georgia in 1997

¹Excluding application costs.