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    Agc332 Exam June 2018

    Uploaded by

    Solomon Mbewe
    This document contains a final exam for a Crop Diseases Management course. The exam has 6 questions worth a total of 100 marks. Question 1 is compulsory and contains subquestions about identifying the causal fungus, symptoms, and control practices of Early Blight disease in tomatoes. It also asks about recommending chemical control methods in maize or wheat. Question 2 asks about discussing three methods of disease forecasting and its usefulness. Question 3 involves highlighting differences between symptoms of two diseases in a table. Question 4 discusses the importance of crop rotation and describing disease scouting methods. Question 5 defines 10 terms related to crop disease management. Question 6 involves drawing and labeling a fungus diagram, describing fungus structure, reproduction, and nutrition.

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    Agc332 Exam June 2018

    Uploaded by

    Solomon Mbewe
    15 views3 pages
    This document contains a final exam for a Crop Diseases Management course. The exam has 6 questions worth a total of 100 marks. Question 1 is compulsory and contains subquestions about identifying the causal fungus, symptoms, and control practices of Early Blight disease in tomatoes. It also asks about recommending chemical control methods in maize or wheat. Question 2 asks about discussing three methods of disease forecasting and its usefulness. Question 3 involves highlighting differences between symptoms of two diseases in a table. Question 4 discusses the importance of crop rotation and describing disease scouting methods. Question 5 defines 10 terms related to crop disease management. Question 6 involves drawing and labeling a fungus diagram, describing fungus structure, reproduction, and nutrition.

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    Crop Disease Exam 2018

    Original Title

    AGC332 EXAM JUNE 2018

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    This document contains a final exam for a Crop Diseases Management course. The exam has 6 questions worth a total of 100 marks. Question 1 is compulsory and contains subquestions about identifying the causal fungus, symptoms, and control practices of Early Blight disease in tomatoes. It also asks about recommending chemical control methods in maize or wheat. Question 2 asks about discussing three methods of disease forecasting and its usefulness. Question 3 involves highlighting differences between symptoms of two diseases in a table. Question 4 discusses the importance of crop rotation and describing disease scouting methods. Question 5 defines 10 terms related to crop disease management. Question 6 involves drawing and labeling a fungus diagram, describing fungus structure, reproduction, and nutrition.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    15 views3 pages

    Agc332 Exam June 2018

    Uploaded by

    Solomon Mbewe
    This document contains a final exam for a Crop Diseases Management course. The exam has 6 questions worth a total of 100 marks. Question 1 is compulsory and contains subquestions about identifying the causal fungus, symptoms, and control practices of Early Blight disease in tomatoes. It also asks about recommending chemical control methods in maize or wheat. Question 2 asks about discussing three methods of disease forecasting and its usefulness. Question 3 involves highlighting differences between symptoms of two diseases in a table. Question 4 discusses the importance of crop rotation and describing disease scouting methods. Question 5 defines 10 terms related to crop disease management. Question 6 involves drawing and labeling a fungus diagram, describing fungus structure, reproduction, and nutrition.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 3

    MULUNGUSHI UNIVERSITY

    SCHOOL OF AGRICULTURE AND NATURAL RESOURCES

    AGA 332 CROP DISEASES MANAGEMENT

    SEMESTER II: FINAL EXAMINATION

    JUNE 2018

    TOTAL MARKS: 100 TIME ALLOWED: 3 HOURS

    INSTRUCTIONS TO CANDIDATES

    1. There are six (6) questions in this paper.

    2. Question 1 is compulsory.

    3. Answer any other four.

    4. Each question carries 20 marks.

    5. Enter your student number on the front page of the answer book. Your name must not appear

    anywhere in your answer book.

    6. Do not write in pencil, except for graphs and diagrams.

    7. No calculator is allowed in this examination.

    8. Please write legibly.

    Page 1 of 3
    QUESTION 1 (20 marks)- COMPULSORY

    a) A local farmer in your area has a 2 ha tomato field growing under sprinkler irrigation. He
    claims to have little knowledge about different diseases that attack tomato as this is only his
    first time growing the crop. He approaches you as he has been told that you are a university
    student taking a course in Crop Diseases Management. Using the skills and knowledge you
    have acquired in AGA332, you discover that the disease the farmer is worried about is
    actually Early Blight caused by a fungus. Write a report with the following as the
    subheadings;
    i. Causal fungus. [2 marks]
    ii. Symptoms. [4 marks]
    iii. Control or disease management practices. [4 marks]
    b) The family Gramineae is comprised of several crops some of which include maize and
    wheat. These crops tend to be attacked by similar diseases. If need be, in which of the two
    crops mentioned would you recommend that a farmer uses chemicals as a way of managing
    and/or controlling plant diseases? Justify your answer. [10 marks]

    QUESTION 2 (20 marks)

    Discuss any three methods of disease forecasting. To what extent is forecasting useful in crop
    diseases management? [20 marks]

    QUESTION 3 (20 marks)

    Using a table, highlight the differences between the symptoms exhibited by Grey Leaf Spot and
    Northern Leaf Blight. [20 marks]

    QUESTION 4 (20 marks)

    a) Discuss the importance of crop rotation in the management of crop diseases.


    [10 marks]
    b) Describe how disease scouting can be done in a either a sorghum or maize field, giving
    examples of different methods to use. [10 marks]

    QUESTION 5 (20 marks)

    Define the following terms as they apply to crop diseases management;

    a) Parthogenesis. [2 marks]
    b) Symptom. [2 marks]
    c) Saprophyte. [2 marks]
    d) Predisposition. [2 marks]
    e) Sporadic. [2 marks]
    f) Epiphytotic. [2 marks]
    g) Susceptible. [2 marks]

    Page 2 of 3
    h) Endophyte. [2 marks]
    i) Incidence. [2 marks]
    j) Resistance. [2 marks]

    QUESTION 6 (20 marks)

    When there is a harmful deviation from the normal functioning of the plant, it can be
    considered to be diseased. Bacteria, fungi and viruses are among the main causes of diseases in
    plants.

    a) Draw a well labeled diagram of a fungus. [4 marks]


    b) Describe the structure of a fungus. [5 marks]
    c) Discuss the mode of reproduction of fungus. [6 marks]
    d) Describe the mode of nutrition. [5 marks]

    Page 3 of 3

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