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                Guava fruit fly: Bactrocera diversus 
              
  
    Symptoms of damage 
      
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Adults and maggots attack semi – ripe fruits 
           
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Oviposition punctures on fruits 
           
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Maggots destroy and convert pulp into a bad smelling 
           
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Discoloured semi liquid mass 
           
         
  Identification of pest 
      
        - Adult - Brown or dark brown with hyaline wings and yellow legs
 
         
      Management 
      
        - Collect and destroy fallen and infested fruits
 
        - Summer ploughing to expose pupa
 
        - Use methyl eugenol lure trap (25/ha) to monitor and kill adults of fruit flies
 
        - Prepare methyl eugenol and malathion 50 EC mixture at 1:1 ratio( take 10 ml mixture/ trap)
 
        - Inseciticides: malathion 50 EC 0.05%
 
        - Bait spray combining molasses or jaggery 10g/l and one of the insecticides,
          
            - malathion 50 EC 2 ml/l
 
            - dimethoate 30 EC 1ml/lit, two rounds at fortnight interval before ripening of fruits
 
            - Field release of parasitoids such as
 
             
          
            
              - Opius compensatus
 
              - Spalangia philippinensis,
 
              - parasitoid wasp, Diachasmimorpha kraussi
 
               
             
           
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        | Diachasmimorpha kraussi | 
         
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