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Pest Management Decision Guide
24 October 2013

Rice caseworm-Sierra Leone: Nymphula depunctalis;

Authors: M. M. Luseni, A. Alami-Bangura, J. K. Karimu, S. B. Williams, S. Koroma, A. H. SesayAuthors Info & Affiliations
Pest Management Decision Guides

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Pictures

Adult and eggs of the rice caseworm (IRRI Rice Knowledge Bank)
Rice caseworm adult (IRRI Rice Knowledge Bank)
Rice with caseworm damage (IRRI Rice Knowledge Bank)

Prevention

•
Select perennial swamps (IVS) as they retain water throughout the year
•
Develop swamp with required structures (bunds, canals, inlet and outlet etc.) to meet the irrigation needs
•
Use resistant varieties (NERICA L19 and L20) with high tillering ability
•
Brush, clear, plough, and puddle before transplanting
•
Also, remove alternate hosts such as Brachiaria, Cyperus, and Cynodon grass species
•
Drain plots before transplanting to kill existing eggs and larvae
•
Transplant seedlings in the correct month (April-June)
•
Transplant seedlings at 21 days after nursing
•
Irrigate plot 7 days after planting to maintain rice growth
•
Apply appropriate agronomic practices e.g. weeding, water management, fertilizer application (N:P:K-20:20:0) 5 bags and 2 bags Urea per hectare

Monitoring

•
The caterpillars live inside the tube, feed on leaves, float over the water to move from plant to plant and defoliate rice plant before reaching maximum tillering stage
•
Closely inspect plots with transplanted seedlings after two (2) weeks for the presence of adult caseworms (moths)
•
Also look for affected rice with signs of caseworm (e.g. eggs, larvae, and adult)
•
Observe for symptoms of infestation: Cut tips of rice leaves; Larvae floating on the water; Leaves folded in the form of a case or passage; Flying adults

Direct Control

•
Flood the plots for 24 hours to drown eggs, then drain for 3-5 days to get rid of the larvae

Direct Control

Apply insecticide such as Fenitrothion (e.g. Tricel 35% c.c.)

WHO Class II (Moderately hazardous); Apply 65-70 mls/gallon of water; Apply when signs of infection are observed especially at vegetative stage; Apply in the morning with the absence of rain or heavy wind

Diazinon granules

WHO Class II; Diazinon granules; 10.0 kg/acre; Apply when signs of insect are observed especially at the vegetative stage; Apply in the morning with the absence of rain or heavy wind
CABI BioProtection Portal

Indexing Terms

Descriptors

  1. arthropod pests
  2. chemical control
  3. control
  4. cultivars
  5. cultural control
  6. diazinon
  7. extension
  8. fenitrothion
  9. fertilizers
  10. flooding
  11. insect control
  12. insect pests
  13. insecticides
  14. irrigation
  15. monitoring
  16. nitrogen fertilizers
  17. pest control
  18. pest management
  19. pest resistance
  20. pesticides
  21. pests
  22. phosphorus
  23. phosphorus fertilizers
  24. physical control
  25. plant pests
  26. ploughing
  27. potassium
  28. potassium fertilizers
  29. puddling
  30. rice
  31. varietal resistance
  32. varieties
  33. water management
  34. weed control
  35. weeding
  36. weeds

Organism Descriptors

  1. arthropods
  2. Brachiaria
  3. Cynodon
  4. Cyperus
  5. insects
  6. Nymphula
  7. Oryza
  8. Oryza sativa
  9. Parapoynx
  10. Parapoynx stagnalis
  11. plants
  12. Poaceae

Identifiers

  1. climate smart agriculture
  2. cultivated varieties
  3. Nymphula depunctalis
  4. paddy
  5. pest arthropods
  6. pest insects
  7. pest management decision guides
  8. plowing
  9. rice caseworm
  10. advisory services
  11. extension activities
  12. fertilisers
  13. flooded conditions
  14. watering
  15. phosphate fertilizers
  16. potash fertilizers
  17. water resource management
  18. subsaharan Africa

Geographical Locations

  1. Africa South of Sahara
  2. Sierra Leone

Broader Terms

  1. invertebrates
  2. animals
  3. eukaryotes
  4. Poaceae
  5. Poales
  6. commelinids
  7. monocotyledons
  8. angiosperms
  9. Spermatophyta
  10. plants
  11. Cyperaceae
  12. Hexapoda
  13. arthropods
  14. Pyralidae
  15. Lepidoptera
  16. insects
  17. Oryza
  18. Parapoynx
  19. Africa
  20. ACP Countries
  21. Anglophone Africa
  22. Commonwealth of Nations
  23. Least Developed Countries
  24. low Human Development Index countries
  25. low income countries
  26. West Africa
  27. Africa South of Sahara

Information & Authors

Information

Published In

cover image PlantwisePlus Knowledge Bank
Pest Management Decision Guides
Pest Management Decision Guide: Green and Yellow List

Applicable geographic locations

Africa,  Sierra Leone

Copyright

© CABI 2013. This article is published under aCreative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)Published under a CC-BY-SA 4.0 licence

History

Issue publication date: 1 January 2013
Published online: 24 October 2013

Language

English

Authors

Affiliations

M. M. Luseni
KFTCRC SLARI Freetown Sierra Leone [email protected]
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