Explanation

(a) Classification of specimens based on the type of mouthparts they possess are:

• Specimen E: Grasshopper - mouth part is used for biting and chewing.
• Specimen F: Cotton stainer -mouth part is used for piercing and sucking
• Specimen G: Weevil - the mouth part is used for biting and boring or boring alone.

(b) Damages done to crops by:

Specimen E (Grasshopper);

• It destroys the leaves (defoliation)
• It destroys succulent parts of the shoot system.
• lt reduces the photosynthetic capacity of crops.
• It reduces yields of crops.

Specimen F (Cotton stainer);

• It sucks sap from cotton bolls.
• It destroys the bolls of a cotton fruit.
• It stains the lint.
• İt attacks and destroys okro.
• It can transmit diseases.
• It creates vents for secondary infection.
• It reduces yields.

Specimen G (Weevil);

• It reduces seed quality.
• It reduces seed viability by destroying the embryo.
• It creates vents for secondary infection.
• It reduces weight of stored grains.

Specimen H (Termites);

• It causes lodging of crops.
• It damages underground storage organs of crops.
• It destroys seedlings.
• It destroys produce being dried on the field.
• destroys timber.
• It reduces yields.

(c) Control measures for Specimen G (Weevil) are:

• proper drying of grains before storage
• timely and prompt harvesting of a crop 
• use of insecticides
• fumigation of storage facilities storage of grains in airtight containers
• smoking of grains

Control measures for Specimen H Termites;

• smoke the termitarium
• chemical control
• regular cultivation
• physically digging out the queen
• destroy the termitarium

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