Paddy Pests
Yellow StemBorer
Symptoms
- Presence of brown coloured egg mass near leaf tip
- Larva bores into central shoot of paddy seedling and tiller, causing drying of the central shoot known as “dead heart”
- If infestation occurs in grown up plant, the whole panicle becomes dried and known as “white ear”
- Affected shoots and panicles could be easily pulled by hand
Identification
- Eggs: are creamy white, flattened, oval and scale like and laid in mass and covered with buff coloured hairs
- Larva: pale yellow with dark brown head
- Pupa: White silken cocoon are found inside the stem
- Adult:
- Female moth: Bright yellowish brown; forewings with a black spot.
Male moth: Smaller with pale yellow; forewings without black spot
Management
ETL: 10% Dead heart symptoms 2% white ear symtoms
- Clip the seedling tips before transplanting to eliminate egg masses.
- Install light trap @ 1 / ha and pheromone trap @ 5 / ac.
- Release egg parasitoid, Trichogramma japonicum @ 2cc /ac 3 times at weely interval.
- Spray Neem seed kernel extract 5% or Azadirachtin 0.03% 400 ml/ac.
- Spray any following insecticides
|
Insecticides |
Dosage |
|---|---|
|
4kg/acre |
|
|
500ml/acre |
|
|
400ml/acre |
|
|
100g/acre |
|
|
250g/acre |
|
|
10kg/acre |
