Pests and Diseases in Rice Crops Quiz

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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?

False smut fungus (A) Signup and view all the answers

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

Use of sclerotia free seeds (C) 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?

Rice blast (C) Signup and view all the answers

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

Growth of resistant varieties (C) 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?

Bacterial Panicle Blight Burkholderia glumae (D) Signup and view all the answers

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

Avoiding excessive nitrogen rates (A) Signup and view all the answers

Which symptom is characteristic of Leaf Blight Xanthomonas oryzae?

Yellow or white strips in the leaf margins (C) Signup and view all the answers

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

Chemical control of brown plant hoppers (D) 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?

Tungro Virus (A) Signup and view all the answers

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

Proper soil preparation (A) Signup and view all the answers

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

Unfilled grains at panicle stage (B) Signup and view all the answers

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

Flooding to submerge the infested field for 2 days (B) Signup and view all the answers

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

Cutting off leaf tips to make leaf cases (A) Signup and view all the answers

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

Use of parasitoids and natural enemies (C) Signup and view all the answers

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

Planting at correct time and avoiding late planting (B) Signup and view all the answers

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

Growing early maturity rice variety as trap crops (A) Signup and view all the answers

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

Stunting plant growth with excessive tillering (B) Signup and view all the answers

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

Cutting off leaf tips to make leaf cases (B) Signup and view all the answers

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

Early planting and use of late-maturing cultivars (B) Signup and view all the answers

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

Use foliar treatments of carbamate insecticides. (B) Signup and view all the answers

What pest causes whitish streaks on rice leaves?

A rice pest that causes whitish longitudinal streaks on leaves, leading to scorching and leaf drying.

How can close planting in rice be avoided?

Passing a thorny brush across the crop is recommended to avoid close planting and control the application of nitrogen and potassic fertilizers in rice cultivation.

What is the main contributor to rice diseases?

Fungi are the primary cause of diseases in rice.

What pest turns rice kernels into 'smut balls'?

The false smut fungus infects rice kernels, causing them to turn into 'smut balls,' which appear orange initially and later turn olive-green to brown.