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Crops > Ornamental

Poinsettia​

Key warning symptoms:

  • Mottle

  • Shoestringing

  • Deformation

  • Distorted bracts

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Poinsettia mosaic virus is widespread, with some poinsettia varieties nearly 100% infected. But the virus apparently does the plants no harm under good growing conditions. Under poor conditions, such as too-cool temperatures or insufficient light, the virus can cause mottled patterns on leaves or distortion of the bracts.

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Poinsettia mosaic virus is not responsible for many of the apparent virus symptoms seen in poinsettias. Even when a plant tests positive for the virus, the symptoms may be due to a nutritional problem or other cause.

 

Fungal Diseases - PCR

  • Botrytis cinerea (Gray mold)

  • Colletotrichum spp. (Anthracnose)

  • Fusarium oxysporum (Crown/stem rot)

  • Fusarium solani (Crown/stem rot)

  • Pythium spp. (Root rot) 

  • Pythium aphanidermatum (Root rot)

  • Pythium ultimum (Root rot)

  • Sclerotinia sclerotiorum (Basal stem and crown rot)

 

Bacterial Diseases - PCR

  • Erwinia carotovora (Bacterial stem rot)

  • Pseudomonas syringae pv.syringae (Leaf spot)

  • Xanthomonas campestris (Xc) (Leaf spot)

 

Poinsettia Virus Screen

  • Cucumber mosaic virus (CMV) ELISA 

  • Impatiens necrotic spot virus (INSV) ELISA

  • Poinsettia mosaic virus (PnMV) ELISA

  • Potyvirus group test (Poty) PCR

  • Tomato spotted wilt virus (TSWV) ELISA

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