White stem borer (Xylotrechus quadriceps, Cerambycidae, Coleoptera)

Xylotrechus quadripes, X. semei, X. chlorophrus annulatus have present in Nepal. Among them, X. quadripes are economically important insects of coffee.

Damaging stage: grub

Damaging symptoms: tunneling from root to hardwood, branch wilt, and break easily.

Identification

• Egg: laid in cracks and crevices and under loose scaly bark of main stem and thick primary
• Grub: white or yellow with the anterior end broader and tapering towards the
• Pupa: inside the stem of
• Adult: black, elongated beetle with gray pubescence on the head, thorax, and White marking on the elytra.

Management

• Provide optimum
• Avoid injuries on the stem and
• Remove loose scaly bark of the main stem, primarily using coir gloves or coconut husk to remove cracks and cervices.
• NSKE 5% used
• Spray Beauveria
• Predator: Apenesia