Topic 5 - Detecting And Identifying Plant Disease Flashcards
What is the importance of detecting and identifying plant diseases?
It helps prevent the spread of disease across an entire crop.
Detecting plant diseases early can save crops and ensure food security.
What are some visible clues of plant diseases in the field?
- Chalara dieback of ash causes malformations and browning of leaves
- Tobacco mosaic virus causes discolouration of leaves
- Bacterial canker on fruit trees causes loss of leaves, stunted growth, and pus-filled lesions on trunk
- Aphids can cause serious structural damage to plants.
These symptoms aid in the preliminary identification of diseases in the field.
What is Chalara dieback of ash?
It causes malformations and browning of leaves.
Chalara dieback is a significant disease affecting ash trees.
What symptoms are associated with Tobacco mosaic virus?
Discolouration of leaves.
This virus affects a variety of plants, including tobacco and other crops.
What are the effects of bacterial canker on fruit trees?
- Loss of leaves
- Stunted growth
- Formation of pus-filled lesions on trunk.
Bacterial canker can severely impact fruit production.
What damage can aphids cause to plants?
Serious structural damage.
Aphids are known pests that can weaken plants and transmit viruses.
What is the first step in laboratory identification of plant diseases?
Cuttings are taken from the diseased plant.
This step is crucial for laboratory analysis.
What is grown on a culture medium/agar plate for disease identification?
The virus/bacterium causing the disease.
Culturing the pathogen is essential for accurate identification.
What testing kit is used to identify pathogens in the lab?
Monoclonal antibody testing kit (ELISA kit).
ELISA (Enzyme-Linked Immunosorbent Assay) is a common technique in plant virology.
