Bioology plant diseases
- Created by: Jess4989
- Created on: 27-04-18 11:39
View mindmap
- Plant diseases
- Rose Black Spot
- Symptoms
- Large black or dark purple spots on the surface of the leaves or stems. As the problem gets worse the foliage gradually turns yellow and drops prematurely, weakening the plant.
- Effects
- extremely common and widespread fungal disease of both cultivated and wild rose varieties
- plants it infects
- Roses
- How is it transmitted?
- Spores are released under wet conditions and and usually spread by rain-splash
- Prevention
- 1. Surround plants with a fresh layer of mulch each spring 2. fortnightly spraying regime to protect your plants 3. Choosing resistant varieties 4.raking around the plant with a *** and pruning and burning of infected material
- Symptoms
- Tobacco mosaic virus
- Symptoms
- Small patches, lighter than normal green, brown and yellow appear on the leaves. These are the earliest symptoms. Stunted growth.
- Effects
- Viral replication disrupts the plants, distracting it from its processe, such as photosynthesis, resulting in the yellowing of leaves.
- How is it transmitted?
- One of the viral protein widens the channels allowing the virus to spread to neighbouring plants, eventually accessing the plants Phloem and Xylem
- Plants infected
- Tomato and Tobbaco plants
- Prevention
- Remove infected plants, washing plants in between planting and rotating crops
- Symptoms
- Bacterial diseases
- Rare in plants
- It helps with human research because you can test monoclonal antibodies
- Symptoms and effects -leaf spots, stem blights, or cankers. vascular wilt, necrosis, soft rot, and tumours and
- They are transmitted by bacterial pathogens enter plants through wounds,
- It effects , potatoes, carrots and squash
- You could prevent it by seed treatment with hot water at about 50° C
- Rare in plants
- Aphids
- Feed on the sap of plants and affect plant growth
- However, heavy infestations will cause leaves to curl, wilt or yellow and stunted plant growth.
- aphids attack the BYDV in the phloem
- Chlorosis -magnesium deficiency- and iron deficiency can damage plants
- Stunted growth because of nitrate deficiency
- Magnesium deficiency causes leaf to turn yellow
- To IDENTIFY plant diseases you could look in a gardening manual, research infected plants in the lab, or use testing kits with monoclonal antibodies
- Rose Black Spot
Comments
No comments have yet been made