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Crops > Ornamental

Chrysanthemum

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Key warning symptoms:

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  • Chlorosis

  • Stunting

  • Yellowed veins

  • Deformed flowers

  • Ringspots

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Chrysanthemum stunt viroid (CSVd), a common pathogen of chrysanthemums, is spread by contact and by propagating infected plants. The viroid can cause severely stunted plants and unsaleable flowers. If your supplier of chrysanthemum cuttings has an effective program of testing for CSVd, it is unlikely this pathogen will be present in your plants. We detect CSVd and Chrysanthemum chlorotic mottle viroid using a nucleic acid hybridization test, which requires several days to complete. Chrysanthemum chlorotic mottle viroid may or may not produce symptoms.

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Other pathogens often detected in chrysanthemums are Chrysanthemum virus B and Cucumber mosaic virus, both transmitted by aphids, and Tomato spotted wilt and Impatiens necrotic spot viruses, both transmitted.

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Fungal Diseases - PCR

  • Alternaria spp. (Alt) (Leaf spot)

  • Botrytis cinerea (Bcin) (Botrytis blight)

  • Fusarium oxysporum (Foxy) (Fusarium wilt)

  • Fusarium solani (Fsol) (Stem rot)

  • Pythium spp (Pyth) (Pythium rot)

  • Pythium ultimum (Pult) (Pythium rot)

  • Rhizoctonia solani (Rsol) (Stem rot)

  • Sclerotinia sclerotiorum (Sscl) (Stem rot)

  • Verticillium spp (Vert) (Verticillium wilt)

  • Verticillium albo-atrum (Vaa) (Verticillium wilt)

  • Verticillium dahlia (Vda) (Verticillium wilt)

 

Chrysanthemum Virus Screen - ELISA

  • Chrysanthemum chlorotic mottle viroid (CChMVd)

  • Chrysanthemum stunt viroid (CSVd)

  • Chrysanthemum virus B (CVB)

  • Cucumber mosaic virus (CMV)

  • Impatiens necrotic spot virus (INSV)

  • Tobacco etch virus (TEV)

  • Tobacco mosaic virus (TMV)

  • Tobacco ringspot virus (TRSV)

  • Tobacco streak virus (TSV)

  • Tomato aspermy virus (TAV)

  • Tomato ringspot virus (ToRSV)

  • Tomato spotted wilt virus (TSWV)

 

Other virus tests available for chrysanthemum

  • Carlavirus group test (CarLa)  PCR

  • Nepovirus group test (Nepo) PCR

  • Pelargonium zonate spot virus (PZSV) ELISA

  • Potyvirus group test (Poty) PCR

  • Tobamovirus group test (Tobamo) PCR

 

Phytoplasmas

  • Phytoplasmas (Phyto)  PCR

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