Crop Protection :: Oil Seeds :: Pest of Sun flower 
           
         
       
        
          
            
                
                  Capitulum borer (Head borer): Helicoverpa armigera 
                     
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                  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
 
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                        | Leaf feeding  | 
                        Larva feeding in seed  | 
                        Caterpillar bore into head  | 
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                  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
 
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                  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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