Insect Pests of Fruit, Plantation, Medicinal & Aromatic Crops (2+1)

1. Shot-hole borer

1. Shot-hole borer - Euvallacea forhicatus Eichh. (Scolytidae: Lepidoptera)

Damage

• The grub tunnel in to the stem which interferes the flow of sap, weakening the stems.
• Presence of round shot holes in primary branches, mortality of buds, dieback in branches and circular or longitudinal tunnels inside the stem are the symptoms of attack.
Bionomics

• The adult xyleborus beetle is minute measuring 3-4 mm in length.
• It lays eggs at junction and opening of side branch and covers with a wad of damp saw dust.