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

INTRODUCTION

 

INTRODUCTION:Sugarcane is one of the major cash crops in Bangladesh.It is also main sugar crops in Bangladesh.About 70% sugar of total requirements for human are obtained  from sugarcane.Sugarcane can be damaged from the first stage of growth by insects.sugarcane can be damaged about 60 insect pests in Bangladesh.Pests are known to cause considerable losses in  cane yield as well as sugar output.

 

 

 

 

 Crop:Sugarcane
Scientific name:Saccharum officinarum
  Family:Poaceae

 

1. Early shoot borer- Chilo infuscatellus

   Symptoms of damage :

• Dead heart in 1-3 months old crop, which can be easily pulled out
• Rotten portion of the straw coloured dead heart emits an offensive odour        
• Bore holes at the base just above the ground level

 

 

 



Bore holes



Side tiller formation



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dead heart

Identification of the pest :

• Larva - Five dark violet stripes and dark brown he ad
• Adult - Pale greyish brown moth with white hind wings

 



Larvae



Adult

 

MANAGEMENT:

• Early planting during main season.
• Intercrop: Daincha – low shoot borer incidence
•  Remove and destroy dead hearts
• Spray Granulosis virus 106 – 107 twice on 35 and 50 days after planting (DAP)
• Whorl application: Sevidol 4G @ 12.5 kg or Lindane 10 G 12 kg + 37.5 kg of sand / ha
• Soil application: Carbofuran 3G @ 33 kg/ ha or chlorpyriphos @ 12.5kg/ ha
• Spray endosulfan 35 EC @ 1000 ml or chlorpyriphos 20 EC @1000 ml / ha or NSKE 5 % twice

 

 

2. Stem or internode borer: Chilo sacchariphagus indicus

Symptoms of damage

• Internodes constricted and shortened with a number bore holes and frass in the nodal region
• Affected tissues reddented.

• 

  BORE HOLES

  

  Reddening of cane

 



Feeding injury