Impatiens necrotic spot virus (INSV) - chickweed

You need to look closely to see the unusual line patterns.

For more information see "Some virus diseases of Greenhouse Crops" , "Greenhouse Weed Control" on the UConn IPM Web site. (click greenhouse on left and then scroll)

Related links on the UMass Web site:

• Impatiens Necrotic Spot Virus and Tomato Spotted Wilt Virus
• Managing Weeds in Your Greenhouse
• A Review of Western Flower Thrips andTospoviruses