Leaf Miner in Cowpea:-
Indentification:-
- The adults are small delicate flies about 1/6 inch in length.
- They are black and yellowish colour.
- Eggs are round, microscopic and vary in colour from yellow to white.
- The larvae, white yellowish coloration near the head are about 1/6 inch when fully grown.
Damage:-
- A female lays about 300 to 400 eggs thrusting these in to leaf tissues with the help of sharp and pointed ovipositor.
- On hatching the maggots mines the leaves in a zigzag fashion feeding on mesophyll with in these mines.
- The infestation of this fly can easily be recognized by the presence of shiny whitish streaks on the leaves against the green background.
- Adults puncture the leaves and feed on exuding sap.
- The flowering and fruiting capacity of in infested plants is adversely affected.
Control:-
- Spray the crop with Dichlorovos (2 ml/lit) +Neem oil (2 Ml/litre ) or Cartap hydrochloride 75 SG (1.5 gm/Litre) of water at fortnight intervals starting from 25 days after sowing to control the pest.
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