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e-Gro Alert report by Brian Whipker

Ranunculus: Necrotic Leaf Spots and Mottling

On a recent greenhouse visit, ranunculus plants with dark necrotic spots, distorted growth, petiole discolouration, and scattered leaf mottling were observed. Thrips were present on some of the ranunculus plants in the greenhouse, but at low levels. Brian Whipker discusses the impatiens necrotic spot virus in e-Gro Alert.

If you suspect a virus problem, have the plants tested by a diagnostic clinic. You can also conduct in-house testing with ELISA kits from Agdia (www.agdia.com). Once a plant has INSV, it cannot be cured. So discarding infected plants is the only option.

Click here to learn more in the e-Gro report by Brian Whipker (PDF)

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