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Clove

Stem borer

Symptoms of damage

The stem borer infests the main stem of young trees at the basal region.
The larva of the pest girdles the stem and bores downward into it.
The girdled portion and bore-hole is covered with a mat- like frass material.
The infested trees wilt and succumb to the pest attack subsequently.

Management

Spray quinalphos 0.1% around the bore-hole and inject the same into the bore-hole after removing the frass.
Swab the basal region of the main stem with carbaryl and keep the basins free of weeds

Scale insect

Black Scale: Saissetia nigra

Symptoms of damage

It infests tender leaves, shoots and twigs.
Sooty mould fungus is observed on leaves due to honey dew secretion.

Identification of pest

Female adults are elliptical, flattened and shiny black.

Management

Removal of affected leaves and branches will prevent the spread.

Masked scale: Mycetaspis personata

Symptoms of damage

Dome shaped and greyish brown scale will be seen on the undersurface of leaves especially of young clove plants.
The infested leaves become discoloured and completely yellowish and finally may fall down.

Identification of pest

Female adults are elliptical, flattened and black in colour.

Chilli thrips

Symptoms of damage

The affected leaves show a pinkish discolouration.
Flower shedding is also noticed

Management

Removal of affected leaves and branches will prevent the spread.
Spray dimethoate or methyl demeton 2ml/lit