Banana Diseases Overview

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following is a fungal disease of banana?

  • Infectious chlorosis
  • Bunchy top of banana
  • Panama wilt disease (correct)
  • Moko wilt

What is the scientific name of the fungus that causes Panama disease?

  • Mycosphaerella musicola
  • Ralstonia solanacearum
  • Fusarium oxysporum f. sp. cubense (correct)
  • Collitotrichum gloeosporioides

Yellowing of leaves from the margins is a symptom of Panama disease.

True (A)

What is a predisposing factor for Panama disease?

<p>Burrowing nematode (Radopholus similis)</p> Signup and view all the answers

Which of the following is a management strategy for Panama disease?

<p>All of the above (D)</p> Signup and view all the answers

The management of Panama disease involves the use of ______ varieties of banana.

<p>resistant</p> Signup and view all the answers

Sigatoka leaf spot is caused by a bacterium.

<p>False (B)</p> Signup and view all the answers

What are the two types of Sigatoka leaf spot?

<p>Yellow Sigatoka and Black Sigatoka (A)</p> Signup and view all the answers

Which of the following is a management practice for Sigatoka leaf spot?

<p>All of the above (D)</p> Signup and view all the answers

Banana anthracnose is a viral disease.

<p>False (B)</p> Signup and view all the answers

What is the scientific name of the fungus that causes banana anthracnose?

<p>Collitotrichum gloeosporioides</p> Signup and view all the answers

Which of the following is a management strategy for banana anthracnose?

<p>All of the above (D)</p> Signup and view all the answers

Moko wilt is a bacterial disease.

<p>True (A)</p> Signup and view all the answers

What is the scientific name of the bacterium that causes Moko wilt?

<p>Ralstonia solanacearum</p> Signup and view all the answers

Which of the following is a symptom of Moko wilt?

<p>All of the above (D)</p> Signup and view all the answers

The pathogen that causes Moko wilt survives in infected debris and soil.

<p>True (A)</p> Signup and view all the answers

What are the three main types of bacterial diseases of banana?

<p>Moko wilt, Pseudo stem rot, and Rhizome rot</p> Signup and view all the answers

What is the scientific name of the bacterium that causes rhizome rot?

<p>Erwinia caratovora sub sp caratovora (A)</p> Signup and view all the answers

Rhizome rot is also known as tip-over disease.

<p>True (A)</p> Signup and view all the answers

How does the bacteria that causes rhizome rot enter the plant?

<p>Through wounds (A)</p> Signup and view all the answers

Which of the following is a management practice for rhizome rot?

<p>All of the above (D)</p> Signup and view all the answers

Banana bunchy top is a fungal disease.

<p>False (B)</p> Signup and view all the answers

What is the scientific name of the virus that causes banana bunchy top?

<p>Banana bunchy top virus (BBTV)</p> Signup and view all the answers

Which of the following is a symptom of banana bunchy top?

<p>All of the above (D)</p> Signup and view all the answers

Aphids can transmit banana bunchy top virus.

<p>True (A)</p> Signup and view all the answers

What is a key management practice for banana bunchy top?

<p>All of the above (D)</p> Signup and view all the answers

Infectious chlorosis is a bacterial disease.

<p>False (B)</p> Signup and view all the answers

What is the scientific name of the virus that causes infectious chlorosis?

<p>Cucumber Mosaic Virus (CMV)</p> Signup and view all the answers

The earliest symptoms of infectious chlorosis appear on mature leaves.

<p>False (B)</p> Signup and view all the answers

Which of the following is a management strategy for infectious chlorosis?

<p>All of the above (D)</p> Signup and view all the answers

How is banana streak virus transmitted?

<p>Both of the above (C)</p> Signup and view all the answers

A prominent symptom of banana streak virus is yellow streaking of the leaves.

<p>True (A)</p> Signup and view all the answers

What is a management practice for banana streak virus?

<p>All of the above (D)</p> Signup and view all the answers

Flashcards

Panama wilt disease

A severe fungal disease of banana caused by Fusarium oxysporum f.sp. cubense.

Symptoms of Panama wilt

Yellowing of leaf margins and longitudinal splitting of pseudostem.

Sigatoka leaf spot

A fungal disease characterized by oval necrotic lesions on banana leaves.

Management of Sigatoka

Includes proper spacing, removing infected plants, and fungicide application.

Signup and view all the flashcards

Anthracnose

A fungal disease causing black spots on banana fruits and pink acervuli.

Signup and view all the flashcards

Management of Anthracnose

Involves careful transportation and packing, and pre-harvest fungicide sprays.

Signup and view all the flashcards

Moko wilt

Bacterial disease caused by Ralstonia solanacearum, leading to yellowing and flower rot.

Signup and view all the flashcards

Symptoms of Moko wilt

Yellowing inner lamina and dead male flower buds.

Signup and view all the flashcards

Rhizome rot

Bacterial disease (Erwinia carotovora) causing rotting of pseudostem base.

Signup and view all the flashcards

Management of rhizome rot

Involves early detection, removing infected plants, and soil drenching.

Signup and view all the flashcards

Banana bunchy top disease

Viral disease caused by the Banana bunchy top virus (BBTV), causing stunted growth.

Signup and view all the flashcards

Transmission of bunchy top disease

Spread by infected suckers and aphids like Pentalonia nigronervosa.

Signup and view all the flashcards

Infectious chlorosis

Mosaic disease caused by Cucumber Mosaic Virus, showing mottled distorted leaves.

Signup and view all the flashcards

Management of viral diseases

Includes eradicating infected plants and controlling aphid vectors.

Signup and view all the flashcards

Banana Streak Virus (BSV)

Viral disease that causes yellow streaks and necrosis on leaves.

Signup and view all the flashcards

Symptoms of BSV

Black streaks on older leaves and necrosis of pseudostem.

Signup and view all the flashcards

Integrated pest management

Combining practices to control banana viruses including vector control and healthy planting.

Signup and view all the flashcards

Fungicides for Sigatoka

Mancozeb or chlorothalonil are used to prevent leaf spot diseases.

Signup and view all the flashcards

Corm injection

A method to manage diseases by inserting a gelatin capsule or solution into the corm.

Signup and view all the flashcards

Trichoderma viride

A biocontrol agent used to suppress fungal pathogens in bananas.

Signup and view all the flashcards

Pre-harvest treatments

Protects bananas by spraying fungicides before harvest.

Signup and view all the flashcards

Flooding infected fields

Used as a management technique to suppress fungal pathogens during their lifecycle.

Signup and view all the flashcards

Cleaning orchard

Periodically removing weeds and diseased plants to prevent disease spread.

Signup and view all the flashcards

Vector control

Managing aphids and mealybugs to reduce virus transmission.

Signup and view all the flashcards

Carbendazim

A systemic fungicide used to manage various banana diseases.

Signup and view all the flashcards

FYM in biocontrol

Farmyard manure used in conjunction with biocontrol agents.

Signup and view all the flashcards

Proper spacing

Essential for healthy banana growth to reduce humidity and disease spread.

Signup and view all the flashcards

Disease resistance

Planting resistant varieties to deal with specific banana diseases.

Signup and view all the flashcards

Monitor for disease

Regularly check banana plants for signs of fungal, bacterial, or viral infections.

Signup and view all the flashcards

Study Notes

Banana Diseases

  • Fungal Diseases:
    • Panama wilt disease
    • Sigatoka leaf spot
    • Anthracnose
  • Bacterial Diseases:
    • Moko wilt
    • Pseudo stem rot
  • Viral Diseases:
    • Bunchy top of banana
    • Infectious chlorosis
    • Bract mosaic

Fusarium Wilt/Panama Disease

  • Causal Agent: Fusarium oxysporum F.sp. Cubense
  • Symptoms:
    • Yellowing of leaves from margins
    • Yellow skirt-like pattern
    • Longitudinal splitting of pseudostem
    • Pinkish discoloration of vascular strand
  • Predisposing Factors:
    • Burrowing nematode (Radopholus similis)

Sigatoka Leaf Spot

  • Causal Agent: Mycosphaerella musicola

  • Symptoms:

    • Oval to round necrotic lesions (first appear pale yellow on lower leaf surface)
    • Pale yellow specks on upper leaf surface, later forming oblong spots (sometimes with yellow halo)
    • Spots enlarge and join
    • Prevent photosynthesis

  • Symptoms Cont.:

    • Destruction of mature leaves
    • Reduced fruit size/poor fruit set
    • Uneven ripening
    • Angular shape/discoloured flesh
    • Possible premature ripening of banana bunches

Black Sigatoka

  • Cause: Mycosphaerella fijiensis
  • Symptoms: Yellow and black spots on leaves.

Banana Anthracnose

  • Cause: Colletotrichum gloeosporioides
  • Symptoms: Black spots on banana fruits covering the entire surface.
    • Pink coloured acervuli on the surface of black spots

Moko Wilt

  • Cause: Ralstonia solanacearum
  • Symptoms:
    • Yellowing of the inner lamina
    • Pale yellow to dark brown vascular discoloration

Rhizome Rot/Soft Rot/Tip Over Disease

  • Cause: Erwinia caratovora
    • sub sp caratovora
  • Symptoms:
    • Rotting of pseudostem base
    • Breaking of pseudostem at base

Banana Bunchy Top Disease

  • Cause: Banana bunchy top virus (BBTV)
  • Symptoms:
    • Bunchy top of the pseudostem
    • Severely stunted plants

Infectious Chlorosis

  • Cause: Cucumber Mosaic Virus
  • Symptoms:
    • Dwarf growth
    • Mottled distorted leaves
    • Light green or yellowish streaks/bands on young leaves

Banana Streak Virus (BSV)

  • Cause:
    - Secondary transmission by mealybugs (Planococcus citri and Saccharicoccus sacchari)
  • Symptoms:
    • Yellow streaking of leaves which become progressively necrotic (black streaked)
    • Necrotic streaks on midrib, petiole, and pseudostem
    • Bunch choking
    • Abortion of bunches
    • Seediness/malformations of fingers
    • Delayed fruit emergence
    • Reduced fruit size

Management

  • General:
    • Resistant Banana Varieties like poovan
    • Proper plant spacing
    • Removal of severely infected plants/leaf blades
    • Weed control
    • Pest control (nematodes, aphids)
  • Fungicides:
    • Mancozeb (Wet season)
    • Chlorothalonil (Wet season)
    • Propiconazole (high disease threat/extended wet weather)
    • Carbendazim
    • Copper oxy chloride
  • Biocontrol: Use of Trichoderma viride or Pseudomonas fluorescens
  • Corm Injection:
    • Using carbendazim or other solutions
  • Pre-harvest:
    • Spray with Carbendazim or Chlorothalonil
  • Post-harvest:
    • Fruit dipping in: Aureofungin, Binomil, or Carbendazim
  • Integrated Virus Management:
    • Eradication of infected plants/suckers
    • Quarantine
    • Use of virus-free planting materials
    • Avoiding cucurbits nearby
    • Controlling vectors (e.g., using insecticides)

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Banana Diseases PPT PDF

More Like This

Doença de Sigatoka Negra em Cultivos de Banana
28 questions

Doença de Sigatoka Negra em Cultivos de Banana

BrotherlyDidgeridoo6969 avatar
BrotherlyDidgeridoo6969
Sigatoka Negra: A Doença da Bananeira
54 questions

Sigatoka Negra: A Doença da Bananeira

BrotherlyDidgeridoo6969 avatar
BrotherlyDidgeridoo6969
Virosis y Plagas en Cultivo de Plátano
48 questions

Virosis y Plagas en Cultivo de Plátano

RespectfulPyramidsOfGiza avatar
RespectfulPyramidsOfGiza
Use Quizgecko on...
Browser
Open
Browser
Browser