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Crop 241: Crop Protection Question Paper

Crop 241: Crop Protection

Course:Agriculture And Natural Resource

Institution: Kenya Methodist University question papers

Exam Year:2013

INSTRUCTION: Answer ALL the questions in section A and any TWO in section B.
SECTION A (30 marks)
Question One
a. Define the following terms:(10 marks)
i. Insecticide
ii. Pathogen
iii. Priming
iv. Rouging
v. Exclusion
b. Name THREE regulations covering the importation of plant materials. (4 marks)
Question Two
a. Name TWO methods of insect classification (4 marks)
b. Name any SIX methods of fungal diseases control (6 marks)
c. What are the THREE groups of exclusion methods? (6 marks)
SECTION B
Question Three
a. Give the general names of the chemicals used to control the following: (2 marks)
i. Insects
ii. Fungus
iii. Weeds
iv. Bacteria.
b. Comment briefly on each of the following aspects of chemical treatment aimed at weed control.
i. Pre planting (4 marks)
ii. Pre emergence(4 marks)
iii. Post emergence (4 marks)
c. Name THREE methods of directed sprays (6 marks)
Question Four
a. Explain how you would carry out the requiring in a field of infected crops. (8 marks)
b.
i. What is plant pathology? (2 marks)
ii. Explain briefly the influence of the following environmental conditions on the growth and spread of disease pathogens.
• Temperature (5 marks)
• Soil and soil fertility. (5 marks)
Question Five
Comment briefly on the following:
a. Aflatoxins (10 marks)
b. Name the THREE stages by which the insects establishes normal feeding on its host plants. (3 marks)
c. Name and explain briefly any SEVEN methods of controlling annual weeds in a maize crop. (7 marks)

Crop 241: Crop Protection Question Paper

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