Best Viewed in Mozilla Firefox, Google Chrome

case worm

20
Jul

Symptoms and Nature of damage of Rice case worm

Symptom of attack of Rice case worm:

Plants stunted, caterpillars hanging on the leaf edges in a tubular case.

Nature of damage of Rice case worm:

1. The caterpillar cuts a piece of leaf, rolls it longitudinally into a tubular structure and remains inside. It feeds by scraping the green tissue of the leaf. The cases often float in the water.

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
Mr. Y. Kondal Rao (DRR)
20
Jul

Control of Rice case worm

1. Flooding the field followed by dragging a roap across the field and draining out the water from the field.

2. Many predators including Spiders, dragonflies, Hydrophilid larvae and birds predate on larvae and adults.

3. Trichogramma minutum Ashmead is reported as a parasite of caseworm eggs.

4. A braconid wasp Dacnusa sp. and a tabanid fly Tabanus sp. parasitize the caseworm larvae.

5. Spraying the crop with 0.05 per cent fenitrothion or 0.05 per cent malathion or 0.15 per cent carbaryl.

File Courtesy: 
ZARS, Mandya
20
Jul

Life stages of Rice case worm

Egg: Eggs are light yellow, disc like, smooth and irregular in shape. They are laid on the underside of the leaves floating on the water.

File Courtesy: 
ZARS, Mandya
19
Jul

Rice case worm

Order: Lepidoptera

Family : Pyraustidae

Scientific name : Nymphula depunctalis

Local name:

File Courtesy: 
ZARS, Mandya
Syndicate content
Copy rights | Disclaimer | RKMP Policies