Rice yellow stem borer | Trichogramma | Biological control | Insect pests control

Biological control of Rice yellow stem borer | Biological control | Insect Pests
Rice stem borer:
Damage symptoms:
Presence of brown coloured egg mass near the leaf tip. In vegetative stage larva enters the stem and feeds on the growing shoot and causes drying of the central shoot known as “dead heart”. In grown up plants whole ear heads become dried and yield chaffy grains called as “white ear”.
Nature of Damage :
In the vegetative phase, the central shoot dies off turning yellow in colour (dead heart). In the ear bearing stage, the ear head appears completely chaffy and white in colour (white ear head). Both come out easily when pulled up and show indications of feeding injuries at the base. 🌾
Identification of pest :
Scientific Name - Scirpophaga incertulas
Egg :
Eggs are creamy white, flattened, oval and laid in a mass which is covered with buff coloured hairs. They are laid mostly near the tip of the leaves. The egg period is 5-8 days.
Larva :
Pale yellow with dark brown head having a prothoracic shield. The larval period is 28 to 30 days.
Pupa :
White silken cocoon. Pupation takes place inside the rice stem, straw or stubble. The pupal period is 8 to 10 days.
Adult :
Female moth :
Has bright yellowish brown with a black spot at the centre of the fore wings and a tuft of yellow hairs at the anal region.
Male moth :
Smaller with pale yellow forewings without black spots
Biological Methods:
Release of egg parasitoid Trichogramma japonicum thrice at weekly interval starting 28 days after transplanting @ 5 cc (1 lakh egg parasitoids)/ha/release. followed by the release of Trichogramma japonicum at 35 and 42 DAT.
Apply Bacillus thuringiensis var kurstaki at 2.5 kg/ha to reduce the oviposition by the stem borer.
Release the egg cards in the field during morning hours. Tie the egg cards under the leaf surface facing outside.
Avoid spraying of chemicals on three days before and up to seven days after the field release of egg cards.
Thanks for watching 🙏
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[@baranidharan5467]

My field is fully damaged by this insect how to cure this ?

[@Insectbulletin]

Are you sure this insect only damaged your rice fields?