top of page


Key warning symptoms:

  • Dark rings

  • Black stems

  • Distorted leaves

Impatiens necrotic spot virus, spread by thrips, accounts for most of the virus infections we detect in impatiens. Symptoms vary greatly. Common symptoms in garden impatiens include dirty-looking, dark-colored rings, black stem sections, distorted leaves, and leaves that drop off. In New Guinea impatiens, symptoms can include brown mottled patterns, distorted leaves, dead stem sections, stunting and an unthrifty appearance. Tomato spotted wilt virus, which is closely related and also spread by thrips, causes a similar array of symptoms.

Tobacco streak virus, although fairly common in impatiens, usually produces only a faint mosaic pattern on the undersides of leaves, or no symptoms at all.

Fungal Diseases - PCR

  • Alternaria spp (Alt) (Leaf spot)

  • Botrytis cinerea(Bcin) (Botrytis blight)

  • Fusarium spp. (Fusarium root and crown rot)

  • Phytophthora sp.(Phytophthora root rot)

  • Pythium spp (Pyth) (Damping-off/root rot)

  • Rhizoctonia solani (Root rot and stem rot)

  • Verticillium dahlia (Vda) (Verticillium wilt)


Impatiens Virus Screen - ELISA

  • Cucumber mosaic virus (CMV)

  • Impatiens necrotic spot virus (INSV)

  • Tobacco mosaic virus (TMV)

  • Tobacco ringspot virus (TRSV)

  • Tobacco streak virus (TSV)

  • Tomato aspermy virus (TAV)

  • Tomato mosaic viru (ToMV)

  • Tomato ringspot virus (ToRSV)

  • Tomato spotted wilt virus (TSWV)

  • Potyvirus group test (Poty)


Other virus tests available for impatiens

  • Alfalfa mosaic virus (AMV) ELISA

  • Carnation mottle virus (CarMV) ELISA

  • Carlavirus group test (CarLa) PCR

  • Nepovirus group test (Nepo) PCR

  • Potyvirus group test (Poty) PCR

  • Tobamovirus group test (Tobamo) PCR

bottom of page