Stem borer: Sahyadrassus malabaricus

Symptoms of damage:

• The stem borer infests the main stem of young trees at the basal region.
• The larva of the pest girdles the stem and bores downward into it.
• The girdled portion and bore-hole is covered with a mat- like frass material.
• The infested trees wilt and succumb to the pest attack subsequently.

Management:

• Spray quinalphos 0.1% around the bore-hole and inject the same into the bore-hole after removing the frass.
• Swab the basal region of the main stem with carbaryl and keep the basins free of weeds

Image source:

www.ignfa.gov.in