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Army Worm/Swarming Caterpillar

Army Worm/Swarming Caterpillar
25
Jul

Chemical control of Armyworm/Swarming caterpillar

Chemical control of Armyworm/Swarming caterpillar

1. Chemical control may be needed when populations are extremely high.

2. The dosage should be adjusted based on the average size of the larvae.

3. Spraying should be done in the late afternoon just before the larvae climb up for feeding.

4. The damage is generally patchy and hence spray can be directed mostly on affected regions

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr.M.Mohan
25
Jul

Biological control of Armyworm/Swarming caterpillar

Biological control of Armyworm/Swarming caterpillar

Armyworms are held in check by egg and larval parasites. When these parasites fail, usually because of drought, armyworms become epidemic

1. Parasitoids such as Trichogrammatids, Scelionids, tachinids, ichneumonids, eulophids, chalcids, and braconid wasps parasitize this pest.

2. Ants, birds and toads feed on the pest. Fungal diseases and a nuclear polyhedrosis virus also infect the larvae.

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr.M.Mohan
25
Jul

Nature of Damage of Armyworm/Swarming caterpillar

Nature Of Damage of Armyworm/Swarming caterpillar

The swarming caterpillars cause severe damage to rice plants in nursery beds. They appear suddenly in masses and move like an army from field to field so that seedbeds or the direct seeded fields look as if grazed by cattle

1. This is a sporadic pest but causes very serious damage to young crops when it appears in large number.

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
Gajendran, G. Prof.&Head (Crop Protection), Trichy
25
Jul

Host Range and Host Plant Resistance of Armyworm/Swarming caterpillar

Host Range of Armyworm/Swarming caterpillar

  • Rice,
  • Maize,
  • Jowar,
  • Wheat,
  • Barley,
  • Sugarcane and
  • a variety of grasses

Host plant resistance to Armyworm/Swarming caterpillar

  • Several wild rices and a few plant introductions (PI) possess moderate levels of resistance to Spodoptera mauritia
File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
25
Jul

Bioecology of Armyworm/Swarming caterpillar

Bioecology of Armyworm/Swarming caterpillar

1. Eggs are laid in masses on leaves and covered with grey hairs.

2. The egg period is 7 days. Caterpillar is cylindrical dark to pale green with lateral lines along the body.

3. The larval period is 20-25 days. It pupates in an earthern cocoon in soil for 10-15 days.

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr.Y.Kondal Rao (DRR)
25
Jul

Distribution of Armyworm/Swarming caterpillar

Distribution of Armyworm/Swarming caterpillar

  • Bihar,
  • Punjab,
  • Uttar Pradesh,
  • Orissa,
  • Madhya Pradesh and
  • Tamil Nadu
File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Taxonomy of Army Worm/Swarming Caterpillar

Taxonomy of Armyworm/Swarming caterpillar

Order : Lepidoptera

Family : Noctuidae

Common name : Armyworm/Swarming caterpillar

Scientific name : Spodoptera mauritia

File Courtesy: 
Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
Photo Courtesy: 
Mr.Y.Kondal Rao (DRR)
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