DISEASE SYMPTOM &MANAGEMENT

Identification of the pest

Management:

• Collect and destroy the eggs periodically
• Detrash: 150 and 210 DAP
• Avoid use of excessive nitrogen fertilizers
• Egg parasitoid: Trichogramma chilonis @ 2.5 c.c / ha (6 releases from 4th month onwards at 15 days interval)

3. Top shoot borer, Scripophaga excerptalis
    Symptoms of damage

















• Parallel rows of shot holes in the emerging leaves and
• Red tunnels in the   midribs of leaves
• Dead heart in grown up canes which cannot be easily pulled
• Dead heart reddish brown in colour

• Bunchy top due to growth of side shoots





Bunchy top





Dead heart



Shot holes on leaves

 Identification of the pest :

• Larva - Smooth, white or cream coloured with a red coloured mid dorsal line
• Adult - White coloured moth. Female has buff coloured anal tuft in abdominal tips



Larvae



Adult

 



Management:

• Collect and destroy the egg masses
• Release Ichneumonid parasitoid:  Isotima javensis @ 125 females / ha (prepupal parasitoid)  

• Larva - four violet or pink stripes and light brown head 
•   Adult - Pale brown with white hind wings