(a) In a tabular form, name one fungal disease, one viral disease and one pest of any four of the following crops: (i) citrus; (ii) banana; (iii) tomato; (i...
Question 1 Report
(a) In a tabular form, name one fungal disease, one viral disease and one pest of any four of the following crops: (i) citrus; (ii) banana; (iii) tomato; (iv) yam; (v) groundnut. (b) State six general control measures of diseases of crops.
Answer Details
(a) Fungal disease, viral disease and pest of four crops
| Crop | Fungal disease | Viral disease | Pest |
|---|---|---|---|
| Citrus | Citrus gummosis / citrus canker | Citrus tristeza virus | Citrus aphid / fruit fly |
| Banana | Panama disease (Fusarium wilt) | Banana bunchy top virus | Banana weevil / nematode |
| Tomato | Early blight / damping-off | Tomato mosaic virus | Tomato fruit worm / whitefly |
| Yam | Yam anthracnose / tuber rot | Yam mosaic virus | Yam beetle / yam nematode |
| Groundnut | Cercospora leaf spot / groundnut rust | Groundnut rosette virus | Groundnut aphid / termite |
(Candidate needs any four crops only.)
(b) Six general control measures of crop diseases
- Plant disease-resistant/tolerant varieties.
- Use certified, disease-free seeds and planting materials.
- Practise crop rotation to break the disease cycle.
- Practise good field sanitation by removing and burning infected plants.
- Apply appropriate chemicals such as fungicides.
- Control insect vectors that spread diseases.
- (Also: proper spacing to reduce humidity, and early planting.)
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