Mount Vernon Northwestern Washington Research and Extension Center

Vegetable Research and Extension

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Intercropping in Carrots for Rust Fly Control

Table 3

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


Table 3. Number of marketable (undamaged), damaged but marketable, and non-marketable carrots due to carrot rust fly damage at four harvest dates (September 5, September 18, September 25, and October 11) in Rochester, Washington, in 1996.

Number of Carrots
Treatment Marketable Damaged Marketable Non-Marketable
Harvest 1
Without intercrop
66.5 8.5 3.5
With intercrop 76.8 13.5 5.5
Significance NS NS NS
Harvest 2
Without intercrop
61.5 27.8 8.5
With intercrop 81.5 21.3 8.3
Significance NS NS NS
Harvest 3
Without intercrop
97.5 65.5 43.5
With intercrop 111.75 64.3 30.8
Significance NS NS NS
Harvest 4
Without intercrop
19.0 43.3 118.3
With intercrop 21.8 51.8 85.0
Significance NS NS NS

image of arrow Carrot Rust-Fly: Experimental Procedure

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