back to HYPP Pathology
home page

Mycologia, DEUTEROMYCOTINA, HYPHOMYCETALES, TUBERCULARIACEAE .

Crops attacked: tomato .

Root rot,

Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images

[R]Description
Parasite of the root and the collar.
The fungus causes browning of the vessels up to 30 cm above the collar.
Unilateral vein-clearing is followed by slow wilting.
Brown longitudinal necrotic lesions form on the stem from which drops of gum exude.
The plant exhales a honeysuckle smell.

[R]Biology
The fungus persists in the soil, usually on plant debris, as chlamydospores.
It is spread by conidia or infested soil dust, by water (irrigation, splash), by wind and air-draught.

[R]Epidemiology
It is usually found in "cold" soils, affects the plants in early crops and those located in the cooler areas of the glasshouse (the optimum is 18 - 20 °C.).
Disinfect the soil or the substrate before sowing as well as the glasshouse equipment and appliance.

[R]Treatement
No treatment is effective during the crop cycle.
Thoroughly remove the dead plants.
Use resistant cultivars to certain fusarium strains.

[R]Possible misleading
.

[R] Images

1. Fusarium spp. , Fusarium wilt (VERGNIAUD P., INRA)
   Fusarium wilt on tomato Necrotic region visible at the base of a tomato stem. It is due to Fusarium spp. which is also causing the dessication of the plant.
   
2. Fusarium spp. , Fusarium wilt (TIVOLI B., INRA)
   Fusarium wilt Foot rot macroconidia.
   
3. Fusarium spp. , Fusarium wilt (TIVOLI B., INRA)
   Fusarium wilt Foot rot chlamydospores.
   

To read this page in French

HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.

back to HYPP Pathology home page