(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 crops by each of specimens E, F, G, and H (TERMITES)
(c) State two control measures of each of specimens G and H.
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