Mount Vernon Northwestern Washington Research and Extension Center

Vegetable Research and Extension

Photo collage of watermelon tasting, tractor, dry beans

Intercropping in Carrots for Rust Fly Control

Table 1

Carol Miles, Ph.D.,WSU Extension, Leslie Zenz, Research Assistant, Betsie DeWreede, Owner, Independence Valley Farm, and Julie Puhich, Owner, Common Ground CSA


Table 1. Weight (lbs) at harvest of marketable (undamaged), damaged but marketable, and non-marketable carrots due to carrot rust fly damage at three harvest dates (September 27, October 4, and October 21) in Rochester, Washington, in 1995.

Weight (lbs)
Treatment Marketable Damaged Marketable Non-Marketable
Harvest 1
Without intercrop
15.47 3.19 13.97
With intercrop 16.84 4.09 6.6
Significance NS NS **
Harvest 2
Without intercrop
12.75 5.63 14.38
With intercrop 13.09 5.59 7.91
Significance NS NS NS
Harvest 3
Without intercrop
2.28 2.5 13.59
With intercrop 4.47 4.88 11.00
Significance NS ** NS
NS Not significant; ** Significant at the 0.05 probability level.

image of arrow Carrot Rust-Fly: Experimental Procedure

Our pages provide links to external sites for the convenience of users. WSU Extension does not manage these external sites, nor does Extension review, control, or take responsibility for the content of these sites. These external sites do not implicitly or explicitly represent official positions and policies of WSU Extension.

WSU Mount Vernon NWREC, 16650 State Route 536, Mount Vernon, WA 98273-4768 USA, 360-848-6150, FAX 360-848-6159, Contact Us