Symptoms of damage
•Grub tunnels in the sapwood on the trunk or branches •Grub bore into the sap wood and macking irregular tunnels.
•Feeding the vascular tissues •interruption of nutrient and water transport on the tissue
•Drying of terminal shoot in early stage
•Frass comes out from several points and some times sap oozes out of the holes
•Wilting of branches or entire tree
Identification of pest
•Grub – Linear, fleshy, apodous
•Adult – Grayish beetle with two pink dots and lateral spine
Life cycle
Management
• •Remove and destroy dead and severely affected branches of the tree
•Remove alternate host, silk cotton and other hosts •Grow tolerant mango varieties viz., Neelam, Humayudin.
•Swab Coal tar + Kerosene @ 1:2 or Carbaryl 50 WP 20 g / l (basal portion of the trunk – 3 feet height) after scraping the loose bark to prevent oviposition by adult beetles.
•If infestations are severe then apply the copper oxychloride paste on the trunk of the tree.
•One celphos tablet (3 g aluminum phosphide) per hole
•Apply carbofuran 3G 5 g per hole and plug with mud.
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