The Bugwood Network

IV. Canola

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

Canola, Brassica napus, isa new winter field crop being grown as an oilseed crop. Virtually all production is in the spring-type varieties that are grown in the Coastal Plain region. Most of canola acreage is contract production of laurate canola. Acreage was about 12,000 acres with most acreage being laurate canola. Market price of laurate canola was $6.25/bu and of other canola was $5.25/bu in 1995. Average yield was 31 bu/acre (1550 lb/acre).*  Hot, dry weather in March reduced pod and seed set.

Three species of aphids (turnip, green peach, and cabbage aphids) occur in canola. Aphids, primarily turnip aphid, were an economic problem in some fields especially in southeastern Georgia. The cabbage seedpod weevil, Ceutorhychus assimilis, occurs only in the Piedmont region and is not a major pest in most new plantings. However, it did severly damage fields on a few farms where canola has been produced for a number of years.

___________

*Dr. John Woodruff, Extension Agronomist, University of Georgia, Tifton, GA, personal communication.

Estimated Losses and Control Costs


Rank

1

2

Insect

Aphids

Cabbage seedpod weevil

Total

Cost of Control

17,000

4,000

21,000

Damage

47,000

1,000

48,000

Total

64,000

5,000

69,000


Information Pertaining to Control of Major Canola Insect Pests in Georgia in 1995.


Insect

Aphids

Cabbage
 Seedpod Weevil

No. Acres Needing Treated

3,600

480

No. Acres Treated

2,400

480

No. of Acres Applic.

1

2

Avg. Cost Per Unit Treated1

7.00

4.00

Bu. Loss on Units Treated

0.9

0.3

Bu. Loss on Units  Nontreated

4.7

3.1


1 Excluding application costs

***

Next Section

line
University of GeorgiaThe Bugwood Network Forestry Images The Bugwood Network and Forestry Images Image Archive and Database Systems
The University of Georgia - Warnell School of Forest Resources and
College of Agricultural and Environmental Sciences - Dept. of Entomology
Last updated on Monday, March 17, 2003 at 02:46 PM
Questions and/or comments to the