Suite101

Rots


© Carla Goodloe

Ever wonder what that brown stuff is on roots, stems, fruit, and flowers? Sometimes leaves are affected but treated as blights and leaf spots instead. Even hardwood can be affected. Rots are caused by fungi and/or bacteria. It shows itself in the form of decaying matter on a otherwise healthy plant.

Stem rot is pretty much the same as "damping off." It creates a softening of tissue and plants will fall over and die. (Picture from Ohio State University ohioline.ag.ohio-state.edu)

Root rot is the same as stem rot only affecting roots below soil level. Plants tend to just fall over and die for no noticeable reason. (Picture from Ohio State University ohioline.ag.ohio-state.edu)

Fruit rot causes fruits to turn brown either soft or hard depending on the crop affected.

Wood rot is caused by extensive exposure to moisture. Home owners generally know what this looks like when it affects processed wood. However, sometimes it's difficult to determine if a live plant has rot. Look for mushrooms growing on the tree. That's an indicator of excessive moisture in that area. Watch for softening areas that may turn brown or black. Some fungus can cause white spots.

For stem, root, and fruit rots, control by allowing for good air circulation and good drainage for plants. Add vermiculite or perlite to clay-like soils. Adding organic humus and compost will also aid in drainage by loosening hard and clay soils. Use sulfur sprays several times in the season. Destroy infected parts. Use crop rotation each year. Keep stored produce in cool, dry atmospheres. Moisture is the biggest instigator of disease being able to spread. Plant resistant varieties of crops.

For wood rots, allow for good air circulation and avoid overlong exposure to moisture. For house wood, use sealant products to keep moisture out. For woody plants and trees, keep soil well-drained, cut out bad parts, and plant resistant varieties.

     

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