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Symptoms of Myrothecium on Umbelliferae

 

  • Organs attacked :
Leaves rods

 

  • Symptoms
    • Rather circular moist to greasy lesions gradually spreading.
    • From beige to pale brown in color, they progressively become necrotic (figure 1).
    • A more or less marked and diffuse yellow halo sometimes surrounds them.
    • Elongated canker lesions may appear on petioles. (figure 2)
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  • Signs : presence of greyish to black sporiferous pads: sporodochia (figure 3). These structures are made up of numerous phialides which form at their end cylindrical conidia, hyaline to slightly olive-coloured.
  • Possible confusion : Sigatoka

 

  • Production areas affected :
Guyana

  

  •  Myrothecium spp. reported on umbelliferae :
Last change : 07/08/22
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Figure 1
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Figure 2
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Figure 3