Classification :
Order:Lepidoptera
Family:Crambidae
Genus:Chilo
Species:infuscatellus
Distribution: Chilo infuscatellus can be
found across India's cane-growing regions.
Identification : The dirty-white, fully-grown caterpillar has five violet dorsal stripes that extend from the second thoracic to the eighth abdominal segment. The moths range in colour from light straw to brownish grey.
Life cycle : On the underside of leaf sheaths or leaves, flat, scale-like, overlapping eggs are placed in clusters of 11–36 in 3-5 rows. One female lays between 300 and 400 eggs. 4–5 day egg time. 3–4 weeks for the larval stage. An adult larva builds a pupal chamber in the cane to pupate in and creates an emerging hole for the moth. Pupation occurs in the stem. 6-7 day pupal period. Adults strive to be2-4 days.A 35–40 day life cycle is typical.
Nature of damage: The larvae that hatch out from the eggs get scattered and young larva enters the stem by passing into the space between the leaf sheath and stem. The caterpillar bores into the growing stem and kills the young plant causing dead heart, if ignored later becomes internodal borer, which bores the stem at internodes. A dead heart that can be pulled out easily. The cut off portion inside the bored plants rots and the dead heart emits an offensive odour on being pulled out. In young tillers, caterpillar bites holes through the stem at the ground level and feeds inside Infestation of internodes of mature canes make them hard, devoid of juice and difficult to mill. Purity of juice and quality of jaggery are also affected.
Management :
- Collection and destruction of egg mass.
- Removal of dead hearts and their destruction.
-Release egg parasites- Trichogramma minutum, T. australicum
- Carbofuran 3G @ 33 kg/ha
-Phorate 10G @ 10kg/ha 30days after sowing
-Chloropyriphos 20EC @ 250ml/100ltr.of water
-moncrotophos 36SL 300ml/100ltr.of water.
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