Correct Answer: D. shadoof

Correct Answer: B. cotton

Correct Answer: D. man

Correct Answer: D. transplanting

Explanation

6(a) Effects of maize weevil on maize grains are: (i) destroys the endosperm, thereby, reducing the food value grains. ( (ii) reduces viability of infested grains as the embryos are damaged. (iii) reduces market value of infested grains. (iv) predisposes infested grains to other pathogenic microorganisms attack. (v) reduces the quantity of the maize grains and produce.

(b) General control measures of insect pests of grains in storage are: (i) Early harvesting of grains such as maize, guinea corn and cowpea reduces the level of infestation and damage in the field. (ii) Proper cleaning and fumigation of sores before grains are stored helps to reduce the level of infestation and damage. (iii) Storage of maize -cobs with or without the husks and guinea corn heads over fire places where they are regularly smoked has been found to be effective in controlling the insect pests (iv) Storage and fumigation of she in silos or sealed polythene bags/ containers. (v) maize cob stored in cribs and unthreshed guinea corn heads in rhumbus should be treated with insecticides such as Actellic 25 dust or liquid, (vi) Grains should be dried to reduce their moisture content to the desired level to kill the eggs and larva of pests.

(c) Insect vectors of crop diseases are: (i) groundnut rosette - aphid (ii) maize streak - Piercing and sucking insects e.g capsid or scale insects. (iii) cassava mosaic - white fly.

Correct Answer: B. electricity

Explanation

2(a) Farm operations requiring electric power are: (i) Refrigeration. (ii) Incubation. (iii) Milking ( machines) (iv) Drying of produce or material. (v) Shelling of fruits/ seeds. (vi) Feed making / grinding / mixing. (vii) Any processing operation e.g parboilling, threshing, winnowing e.t.c. (viii) Defeathering / plucking. (ix) Debeaking. (x) Candling. (xi) egg or grading.

(b) Advantages and disadvantages of (i) electricity: Advantages: (1) Neat (2) Fast operation increased production. (3) Very dependable (4) Easy to operate. (5) Versatile. (6) Efficient and saves energy and reduces cost of production too.

Disadvantages: (1) Very expensive (2) Dangerous to life (3) Supply may be irregular - (4) It Can cause fire hazard. (5) Cannot be widely used in field operations.

(ii) Animals: Advantages: (1) Cheap to maintain (2) Cheap to purchase. (3) Easy to operate. (4) Can operate in rugged terrains. (5) Can be used in evacuation of produce from inaccessible areas. (6) They are more efficient than man. (7) Removes drudgery and makes work easier.

Disadvantages: (1) They require human guidance. (2) Power output is very low. (3) Capacity is limited and may refuse to work. (4) Prone to infection by disease. (5) Limited to some types of operations.

Correct Answer: A. land clearing-ploughing-harrowing-ridging

Correct Answer: A. bull

Correct Answer: C. feeling