(a) Classify specimens E (GRASSHOPPER), F (COTTON STAINER), and G (WEEVIL)according to the type of mouthparts they possess. (b) State two damages done to cr...

Answer Details

(a) Classification of specimens by type of mouthparts

• E (grasshopper): biting and chewing mouthparts.
• F (cotton stainer): piercing and sucking mouthparts.
• G (weevil): biting and chewing mouthparts (borne on a snout/rostrum).

(b) Two damages done to crops by each

• E (grasshopper): defoliates plants by eating leaves; destroys young shoots/stems, reducing yield.
• F (cotton stainer): pierces and sucks sap from bolls, staining the cotton lint; transmits fungal disease that lowers quality.
• G (weevil): bores into and eats stored grains/seeds, reducing weight and viability; introduces moulds and contaminates the produce.
• H (termites): attack and destroy roots and stems, ring-barking and killing plants; damage wooden structures and stored materials.

(c) Two control measures of each

G (weevil):

1. Dry grains well and store in clean, air-tight containers.
2. Treat stored produce with recommended insecticides/dusts and maintain store hygiene.

H (termites):

1. Locate and destroy the termite mounds/queen and apply approved insecticides to the soil.
2. Keep the farm clean, remove wood debris and use termite-resistant/treated materials.