JAMB CBT Software 2024 - Free Download
JAMB CBT Mobile App 2024 - Free Download

1993 WAEC Agricultural Science Practical (a) ldentify specimens D, E, F, and G.            (b) What type of...

Agricultural Science
WAEC 1993

(a) ldentify specimens D, E, F, and G.

Grasshoppers: The Family Acrididae  Aphid - Wikipedia    cotton stainer - Dysdercus suturellus (Herrich-Schaeffer)    How to Get Rid of Weevils in Pantries and Cupboards

(b) What type of mouthparts is possessed by each of specimens D, E, F and G

(c) State one method of controlling specimen F.

JAMB CBT Mobile App 2024 - Free Download
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
JAMB CBT Software 2024 - Free Download
JAMB 2024 Whatsapp Group - Join us here
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Explanation

(a) Identification of Specimen;

  • D is Grasshopper;
  • E is Aphid;
  • F is Cotton Stainer;
  • G is Weevils.

(b) Type of Mouth parts possessed by specimen;

  • D - Bitting and chewing
  • E - Piercing and Sucking
  • F - Piercing and Sucking
  • G - Boring

(c) Damages done by specimens D, E, F and G to crops

Specimen D;

  • Eats up the leaves and stems.
  • reduces the rate of photosynthesis.
  • reduces growth.
  • reduces yield.

Specimen E:

  • toxic saliva
  • transmits diseases.
  • reduces quality of boll.
  • leaf distortion. 

Specimen G:

  • bores holes into grains and eat them up
  • Reduces the quality of stored produce
  • Reduces grains to powder.

(d) Methods of controlling specimen F are:

  • Hand picking.
  • Spray with insecticides.

Report an Error Ask A Question Download App
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
JAMB CBT Mobile App 2024 - Free Download
JAMB CBT Software 2024 - Free Download
JAMB 2024 Whatsapp Group - Join us here
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995

Contributions ({{ comment_count }})

Please wait...

{{ settings.no_comment_msg ? settings.no_comment_msg : 'There are no comments' }}

Quick Questions

Post your Contribution

Please don't post or ask to join a "Group" or "Whatsapp Group" as a comment. It will be deleted. To join or start a group, please click here

{{ quote.posted_by.display_name }}
{{ settings.form_textarea_description }}
 
JAMB CBT Mobile App 2024 - Free Download
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
JAMB 2024 Whatsapp Group - Join us here
JAMB CBT Software 2024 - Free Download
JAMB CBT Software 2024 - Free Download
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
JAMB CBT Mobile App 2024 - Free Download
JAMB 2024 Whatsapp Group - Join us here