What are ROTS?

Rots are diseases that decay roots, stems, wood, flowers, and fruit. Some diseases cause leaves to rot, but those symptoms tend to be described as leaf spots and blights. The decay may be hard, dry, spongy, watery, mushy, or slimy and may affect any plant part. They are caused by various bacteria and fungi. Many are very active in stored fruits, roots, bulbs, or tubers.

Types of Rots

Gray mold rots: Caused by a fungi in the genus Botrytis.The rot is seen as a soft tan to brown spot that is covered by a sooty mold later on.Affected plants especially young seedlings wither and die.

 

Basal/bulb rots: This is common in Flower Farms where it can affect the entire plant. It is caused by a variety of fungi and bacteria.Affected plant shoots fail to emmerge, stanted growth.Affectedplant leaves change color to yellow,purple or even red. In severe cases the leaves wither and die.


Root+Stem rots: This is caused by a variety of fungi.Affected plants loose growth vigour and turn yellow.Plants hardly respond to fertilizers.Roots decay and may be covered with mold or black stringlike strands. The rots can be avoided by growing resistant varieties,disease free plants.Well drained soils with good amounts of organic matter.Practising crop rotation will also help.


Wood rots:Affected wood is often discoloured or stained, lightweight, soft, crumbly, or powdery. Damage usually occurs slowly, often over a period of many years. Infection occurs almost entirely through wounds. Hoof- to shelf-shaped fruiting bodies (conks) develop along the trunk and branches; or mushrooms may form at the trunk base or at the sites of wounds. A fruiting body or mushroom cluster indicates extensive decay. Wood rot can be avoided by removing dead and dying branches, making pruning cuts flush with the stems (leaving no stubs as possible entry for fungi), and wrapping young trees to protect against tree borers that can carry the causal fungi. Tree wound dressings are of doubtful value in preventing rots.

Advertisement