Week 6: Bacterial and nematode diseases of plants
About 1,600 bacterial species are known. Several species cause diseases in humans, including tuberculosis, pneumonia, and typhoid fever, and a similar number cause diseases in animals, such as brucellosis and anthrax. About 100 species of bacteria cause diseases in plants. Most plant pathogenic bacteria are facultative saprophytes and can be grown artificially on nutrient media; however, fastidious vascular bacteria are difficult to grow in culture and some of them have yet to be grown in culture.
The direct mechanical injury inflicted by nematodes while feeding causes only slight damage to plants. Most of the damage seems to be caused by a secretion of saliva injected into the plants while the nematodes are feeding. Some nematode species are rapid feeders. They puncture a cell wall, inject saliva into the cell, withdraw part of the cell contents, and move on within a few seconds.
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- Week 1-3: Introduction and importance of plant pathology
- Week 4-5: Important viral diseases of plants
- Week 6: Bacterial and nematode diseases of plants
- Week 7: Phanerogemic parasites and a-biotic diseases in plants
- Week 8-14: Fungal diseases of plants
- Week 15: Plant disease management
- Course outline
- Chapters 7
- Department College of Agriculture
- Teacher
Yasir Iftikhar
