Pests and Diseases in Rice Crops Quiz
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Questions and Answers

What type of rice pest causes whitish longitudinal streaks on leaves, leading to scorching and leaf drying?

  • Rice Caseworm
  • Weevil infestation
  • Paddy bug (correct)
  • Yellow Stem Borer
  • Which management technique is recommended to avoid close planting and control the application of nitrogen and Potassic fertilizers in rice cultivation?

  • Crop rotation
  • Passing a thorny brush across the crop (correct)
  • Spraying of Copper oxychloride
  • Use of systemic fungicides
  • What is the main cause of diseases in rice according to the text?

  • Fungi (correct)
  • Bacteria
  • Viruses
  • Nematodes
  • Which pest causes infected rice kernels to turn into 'smut balls' first appearing orange and later turning olive-green to brown?

    <p>False smut fungus</p> Signup and view all the answers

    What is the recommended disease management technique for Rice Caseworm infestation?

    <p>Use of sclerotia free seeds</p> Signup and view all the answers

    Which pest causes initial white to gray-green lesions on rice shoots, which may later enlarge and kill entire leaves?

    <p>Rice blast</p> Signup and view all the answers

    What is a recommended cultural practice for managing Yellow Stem Borer in rice cultivation?

    <p>Growth of resistant varieties</p> Signup and view all the answers

    Which rice disease is characterized by green panicle branches up to the infected grain with two-toned grain having brown discoloration on the lower third to half of the grain?

    <p>Bacterial Panicle Blight Burkholderia glumae</p> Signup and view all the answers

    What is a recommended method for managing Bacterial Panicle Blight Burkholderia glumae?

    <p>Avoiding excessive nitrogen rates</p> Signup and view all the answers

    Which symptom is characteristic of Leaf Blight Xanthomonas oryzae?

    <p>Yellow or white strips in the leaf margins</p> Signup and view all the answers

    What is a key disease management strategy for Ragged Stunt in rice?

    <p>Chemical control of brown plant hoppers</p> Signup and view all the answers

    Which rice disease is spread by zig-zag and green plant hoppers and affects all growth stages of the rice plant?

    <p>Tungro Virus</p> Signup and view all the answers

    What is a recommended approach for managing Brown Spot Helminthosporium oryzae in rice cultivation?

    <p>Proper soil preparation</p> Signup and view all the answers

    What is a common symptom of a rice plant infested with Paddy bug Leptocoriza acuta?

    <p>Unfilled grains at panicle stage</p> Signup and view all the answers

    Which management technique is specifically recommended for controlling Yellow Stem Borer Scirpophaga incertulas?

    <p>Flooding to submerge the infested field for 2 days</p> Signup and view all the answers

    What is a distinctive symptom caused by Rice Caseworm Nymphula depunctalis on rice plants?

    <p>Cutting off leaf tips to make leaf cases</p> Signup and view all the answers

    Which of the following is a commonly used biological control method for managing pests in rice cultivation?

    <p>Use of parasitoids and natural enemies</p> Signup and view all the answers

    What is the recommended action for managing Rice Leaf Folder Cnapholocrocis medinalis?

    <p>Planting at correct time and avoiding late planting</p> Signup and view all the answers

    Which practice is NOT effective in controlling Yellow Stem Borer Scirpophaga incertulas?

    <p>Growing early maturity rice variety as trap crops</p> Signup and view all the answers

    Which symptom is typically NOT associated with an infestation by Yellow Stem Borer Scirpophaga incertulas?

    <p>Stunting plant growth with excessive tillering</p> Signup and view all the answers

    What is a key distinguishing characteristic of Rice Caseworm Nymphula depunctalis?

    <p>Cutting off leaf tips to make leaf cases</p> Signup and view all the answers

    In managing Paddy bug Leptocoriza acuta, which technique may not be effective?

    <p>Early planting and use of late-maturing cultivars</p> Signup and view all the answers

    Which management technique is not advisable for controlling Rice Leaf Folder Cnapholocrocis medinalis?

    <p>Use foliar treatments of carbamate insecticides.</p> Signup and view all the answers

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