Study specimens G (GRASSHOPPER), H (BEAN…

Question 1 Report

Study specimens G (GRASSHOPPER), H (BEAN BEETLE), I (BIRD), and J (RAT) carefully and answer the following questions.

(a)(i) Classify specimens G and H according to their feeding habits.

(ii) Name one part of crops damaged by each of specimens G and H.

(ii) State three ways in which specimen H is economically important. (3 marks ]

(b) State four ways of controlling each of specimens I and J

Answer

(a)(i) Classification of G and H by feeding habit

Specimen G (grasshopper): a biting and chewing insect pest.
Specimen H (bean beetle): a biting and chewing insect pest (its larva and adult chew/bore into the seed).

(a)(ii) Part of crop damaged by each

(a)(iii) Three ways specimen H (bean beetle) is economically important

It bores into and eats stored bean seeds, reducing the weight and quantity available.
It lowers the market value and quality of the beans, causing financial loss.
It destroys the germinating power (viability) of seeds meant for planting, and its holes allow entry of moulds that spoil the produce.

(b) Four ways of controlling specimens I and J

Specimen	Four control measures
I (bird)	Use scarecrows and bird scarers; net or cage nursery/seed beds; shoot or trap destructive birds; grow early, uniform-maturing and resistant varieties and harvest promptly
J (rat)	Set rat traps; use rat poisons (rodenticides/baits); keep the farm and store clean by clearing bushes and hiding places; keep natural enemies such as cats and maintain rat-proof storage structures

Answer Details

(a)(i) Classification of G and H by feeding habit

Specimen G (grasshopper): a biting and chewing insect pest.
Specimen H (bean beetle): a biting and chewing insect pest (its larva and adult chew/bore into the seed).

(a)(ii) Part of crop damaged by each

(a)(iii) Three ways specimen H (bean beetle) is economically important

It bores into and eats stored bean seeds, reducing the weight and quantity available.
It lowers the market value and quality of the beans, causing financial loss.
It destroys the germinating power (viability) of seeds meant for planting, and its holes allow entry of moulds that spoil the produce.

(b) Four ways of controlling specimens I and J

Specimen	Four control measures
I (bird)	Use scarecrows and bird scarers; net or cage nursery/seed beds; shoot or trap destructive birds; grow early, uniform-maturing and resistant varieties and harvest promptly
J (rat)	Set rat traps; use rat poisons (rodenticides/baits); keep the farm and store clean by clearing bushes and hiding places; keep natural enemies such as cats and maintain rat-proof storage structures

Study specimens G (GRASSHOPPER), H (BEAN BEETLE), I (BIRD), and J (RAT) carefully and answer the following questions. (a)(i) Classify specimens G and H acco...