Coffee Borer in Indo-China.
The coffee borer [Zeuzera coffeae] is a serious pest in the coffee plantations of North Annam, where 12 or 13 per cent. of the trees, if not more, are attacked by it every year. As the larva of this moth attacks the root as well as the branches, cutting down the bushes is useless unless the stumps are also removed; consequently plantations always show gaps that must be replanted with vigourous nursery stock. The insect begins its attack on the bushes in the third year from planting.