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Agricultural Science 1998 Waec Past Questions and Answers

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Agricultural Science 1998 Waec Past Questions


Question 31 :



The physiological changes that show up during disease attack on crop plants are referred to as

A. Signs
B. Symptoms
C. Necrosis
D. Deformations
E. Abnoemalities


Question 32 :



The major pest of maize in Southern Nigeria is called

A. Budworm
B. Stem borer
C. Leaf worm
D. Aphid
E. Mealy bug


Question 33 :



Which of the following insect pests of crops is usually controlled by fumigation?

A. Bean weevil
B. Capsid bug
C. Cotton stainer
D. Grasshopper
E. Yam beetle


Question 34 :



A major symptom f onion/twister is

A. Appearance of dark brown spots on leaves
B. Motting of leaves
C. Rottening of roots
D. Rottening of bulds
E. Premature drying of leaves


Question 35 :



Gummosis is caused by a

A. Fungus
B. Virus
C. Bacterium
D. Nematoad
E. Protozoan






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