Susceptibility of citrus seedlings to Fusarium solani inoculation

The complex species Fusarium solani is associated with dry root rot disease of citrange, as well as other citrus rootstocks. In a large number of experiments, the success of inoculation attempts was heavily affected by plant age, inoculum preparation, and inoculation protocol. Maize meals and fungus...

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Bibliographic Details
Published in:Journal of plant pathology 2005-12, Vol.87 (4), p.295-295
Main Authors: Grimaldi, V, Coco, V, Catara, A
Format: Article
Language:English
Subjects:
Citrus
Citrus sinensis
Fusarium solani
Oryza sativa
Poncirus trifoliata
Zea mays
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Summary:The complex species Fusarium solani is associated with dry root rot disease of citrange, as well as other citrus rootstocks. In a large number of experiments, the success of inoculation attempts was heavily affected by plant age, inoculum preparation, and inoculation protocol. Maize meals and fungus cultures and the inoculation of perlke-grown young citrange seedlings, turned out to be the most effective. Three F. solani isolates, i.e. 1A and R2B (recovered from Troyer citrange roots) and 2B (from sour orange) proved to be pathogenic to citrange seedlings. After 36 days, inoculated seedlings showed root rot, sometime browning of the apex and central region of the roots and of the crown, reduced growth of roots and stem up to -21.4%. No wilting or scorching were observed on the shoots. All symptomatic root apexes were infected. Five different citrus species, including sour orange, sweet orange, Troyer citrange, Parson special mandarin and Poncirus trifoliata, were sown in pots containing soil added with maize meal-sand or rice inoculum of isolate 1A. Inoculation resulted in detrimental effects consisting of lower number of germinating seeds and reduced growth of stem and roots.
ISSN:1125-4653