Nectriella pironii is a plant pathogen, that parasitizes '' Aphelandra squarrosa, Clerodendron bungei,

Codiaeum variegatum ''Codiaeum variegatum'' (fire croton, garden croton, or variegated croton; syn. ''Croton variegatum'' L.) is a species of plant in the genus ''Codiaeum'', which is a member of the family Euphorbiaceae. It was described by Carl Linnaeus in 1753. I ...

, Jussiaea peruviana,

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, Pittosporum tobria,

Plumbago capensis ''Plumbago auriculata'', the cape leadwort, blue plumbago or Cape plumbago, is a species of flowering plant in the family Plumbaginaceae, native to South Africa."Botanica. The Illustrated AZ of over 10000 garden plants and how to cultivate them" ...

Chrysanthemum morifolium Chrysanthemums (), sometimes called mums or chrysanths, are flowering plants of the genus ''Chrysanthemum'' in the family Asteraceae. They are native to East Asia and northeastern Europe. Most species originate from East Asia and the center o ...

'' and ''Psychotria undata''. The species is named in honor of Pascal Pompey Pirone.

Plant symptoms

Symptoms on leaves appear as slightly sunken spots surrounded by a dark brown edge. The center of the spot may appear pink from the spore masses which are being produced by the

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from t ...

. Frequently, large areas on the leaf turn brown, dry out along the leaf margins, and eventually the leaf falls off. Symptoms on fruit also develop as small, discolored, sunken areas that enlarge and develop pink spore masses in the center. Fruits that develop will soft rot and drop off the tree. In chrysanthemum, the fungus will first produce an infection canker near the bottom of the stem after which the fungus most likley disturbes the plant hormonal system causing infected plants to grow taller then uninfected plants. In time, infected chrysanthemum plants will also show very typical blister like leasions on the leaves, making this disease quite easily recognisable.

References

External links

Index Fungorum

USDA ARS Fungal Database
Fungal plant pathogens and diseases Fungi described in 1980 Bionectriaceae {{fungus-plant-disease-stub