White grub (Phylophaga rugosa ,Scrabaediae ,Coleptera)

• Polyphagus pest , found in all agroecological zone .
• It’s a root damaging insect .
• Larvae of chaffer beetle .
• Maize and potato is major host which damage by this insct .

Damaging stage : larvae and adult

Damaging symptoms : cut root below ground and just above the soil.

Identification

• Egg : laying undecomposed manure ,moist with high oranic manure .
• Larvae : brownish head with 3 pair leg ,C – shaped body
• Pupa :- occur in soil
• Adult :– light to dark brown in color ,smooth and shiny beetle with different color.

Management

• Collect and destroy
• Used only well decomposed manure .
• Light trap
• Collect and destroy host tree( neem and bakaino ) after
• Use fungal pathogen like beauveria bessiana (white muscardian fungus ) metarhizium anisopilae .
• Dursban 10% G (chloropyrifos )@20-25kg /ha in soil before sowing the crop in white grub endemic field .