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Crop Protection :: Oil Seeds :: Pest of Sun flower

Capitulum borer (Head borer): Helicoverpa armigera

Symptoms of damage:

  • The larva feeds on the developing seeds and bore the head
  • Fungal developed and head starts rotting
  • The larva consumes leaf in early stage of growth and move towards the capitulum and tunnel the head
Capitulum borer boring sunflower capitulum

 

Leaf feeding Larva feeding in seed
Caterpillar bore into head
 

Identification of the pest:

  • Egg:  Spherical in shape and creamy white in colour, laid singly
  • Larva: Shows colour variation from greenish to brown. It has dark brown grey lines on the body with lateral white lines and also has dark and pale bands
  • Pupa: Brown in colour, occurs in soil, leaf, pod and crop debris
  • Adult: Light pale brownish yellow stout moth. Forewings are olive green to pale brown with a dark brown circular spot in the centre. Hind wings are pale smoky white with a broad blackish outer margin
Larva
Pupa
Adult

Management:

  • Grow inter crops like, green gram, black gram, groundnut, soybean
  • Sow 3-4 lines of maize (or) jowar around the sunflower crop to monitor the moth
  • Sow trap crops like marigold at 50 plants/acre
  • Use of pheromone traps (4 traps/acre) for pest intensity identification as well as to trap the male moths
  • Setting of light traps (1 light trap/5 acre) to know the range of pest incidence as well as to kill moth population
  • Release predators like coccinellids, Chrysoperla carnea @1larva/ head
  • Release parasitoides like Trichogramma spp.@ 20,000/acre,  (Bracon spp., Campoletis spp)
  • Spray HaNPV 250 LE + Bt @0.5kg/ha for effective control
  • Spray HaNPV 250 LE/ha +1 kg Jaggery + 200ml Sandovit (or) Teepal; mixing and spray in the evening hours only
  • Spraying of 5% Neem oil or 5% Neem Seed Kernal extract before egg laying

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