Verticillium wilt belongs to the soil fungi that causes wilt in greenhouses and on wet soils.
Verticillium species are soil fungi that causes wilting, especially in hot greenhouses and on wet soils. However, various garden plants can also be affected by this fungus such as strawberries, alfalfa, clematis and maples. A variant of this soil fungus (Verticillium albo-atrum var. menthae) can cause wilting in plants of the mint famlily (Lamiaceae).
The fungus is spread through contaminated pruning tools. The fungus disrupts the sap flow causing wilting.
The disease symptoms are similar to those of Fusarium wilt, which also causes wilting of plants.
The symptoms may also resemble those of Black root of cucurbit (Phomopsis sclerotioides).
Where to find
- Green house
- Strawberry
- Maple
- Clematis
- Alfalfa
- Mint
- Horse Chestnut
- Passion Flower
- Sunflower
Control
Remove infected plants; disinfect soil. Prune wilted branches. Burn prunings, do not shred them as this will spread the fungus.
Clean pruning tools well (Dettol).
Prevention
Clean pruning and other tools carefully after use. If Verticillium wilt is suspected, disinfecting tools will help prevent infection.
