Theory question 106
Crop Diseases(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
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(a) Any four rows:
Citrus – fungal: gummosis/foot rot, scab; viral: tristeza; pest: citrus fruit moth, aphids, fruit flies
Banana – fungal: Sigatoka leaf spot, Panama disease; viral: bunchy top; pest: banana weevil, nematodes
Tomato – fungal: damping off, early blight, Fusarium wilt; viral: tomato leaf curl, mosaic; pest: whitefly, root-knot nematode, fruit worm
Yam – fungal: anthracnose, tuber rot; viral: yam mosaic; pest: yam beetle, nematodes, mealybugs
Groundnut – fungal: Cercospora leaf spot, rust; viral: rosette; pest: aphids, termites, millipedes
(b) Any six: plant resistant varieties; use disease-free seeds and planting materials; crop rotation; seed dressing; spraying fungicides/chemicals; uprooting and burning infected plants (sanitation); control of insect vectors; proper spacing and drainage; quarantine; early planting; fallowing
Set (a) out as a table with crops in rows.