Nectriella pironii is a plant pathogen. It parasitizes ''

Aphelandra squarrosa '' Aphelandra squarrosa'' (commonly but ambiguously called "zebra plant") is a plant species in the family Acanthaceae, which is native to Atlantic Forest vegetation of Brazil. This plant is often used as a houseplant, house plant. This plant is ...

'', '' Clerodendron bungei'', ''

Codiaeum variegatum ''Codiaeum variegatum'' (fire croton, garden croton, or variegated croton, or simply 'croton'; syn. ''Croton variegatum'' L.) is a species of '' Codiaeum'', a genus of flowering plants, in the Euphorbiaceae (the spurge family). Initially describ ...

'', '' Jussiaea peruviana'', ''

Leucophyllum frutescens ''Leucophyllum frutescens'' is an evergreen shrub in the Scrophularia, figwort family, Scrophulariaceae, native to the U.S. state of Texas, where it is the official "State Native Shrub of Texas", and to the states of Coahuila, Nuevo León, and Ta ...

'', '' 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 and Mozambique."Botanica. The Illustrated AZ of over 10000 garden plants and how to cu ...

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

'' and ''

Psychotria undata ''Psychotria'' is a large genus of flowering plants in the coffee family Rubiaceae, with over 1,600 species. The genus has a pantropical distribution and members of the genus are small understorey trees in tropical forests. Some species are endan ...

''. 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 In biology, a spore is a unit of sexual reproduction, sexual (in fungi) or asexual reproduction that may be adapted for biological dispersal, dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores fo ...

masses which are being produced by the fungus. 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 likely disturbed the plant hormonal system causing infected plants to grow taller than uninfected plants. In time, infected chrysanthemum plants will also show very typical blister like leasions on the leaves, making this disease quite easily recognisable (William Quaedvlieg, unpublished information).

References

External links

Index Fungorum

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