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Turmeric and Ginger

Shoot borer

Symptoms of damage

Yellowing and drying of leaves of infested pseudostems.
The presence of a bore-hole on the pseudostem through which frass is extruded and the withered and yellow central shoot

Identification of pest

Egg: is pink, oval, flat and lays singly or in group on the tender part of the plant

Larva: is long, pale greenish with a pinkish was dorsally, head and pro-thoracic shield brown in colour and body covered with minute hairs arising on wards.

Pupa: Pupation takes place in lose silken coccon in larval tunnel.

Adult: is a medium sized moth, the wings are pale yellowish with black spots on the wings.

Management

Spraying malathion 0.1% at 30 day intervals during July to October is effective in controlling the pest infestation.
The spraying has to be initiated when the first symptom of pest attack is seen on the inner most leaves on the pseudostem.

Rhizome scale

Symptoms of damage

Plants look devitalized, pale and withered before drying completely.
In such cases at the time of harvest minute yellowish crawlers can be seen moving in large numbers and this is the potential stage of dissemination.

Identification of pest

In Initial stage of infestation in, the white coloured scales are seen scattered on rhizomes and latter they congregate near the growing buds.

When the infestation is severe the rhizome and buds shrivel and ultimately the entire rhizome dries.

Female: scales are circular (about 1mm diameter) and light brown to gray and appear as encrustations on the rhizomes.

Male is orange coloured with transparent wings, distinct head, thorax and abdomen.

Management

Discard and do not store severely infested rhizomes
Collect and destroy damaged leaves
Select healthy rhizomes free from scale infestation for seed materials
Treat seed material with quinalphos 0.075% (for 20-30 minutes) before storage and also before sowing in case the infestation persists.
Apply well rotten sheep manure @ 10 t/ ha in two splits or poultry manure in 2 splits followed by drenching dimethoate 30 EC @ 2 ml or phosalone 35 EC @ 2ml /lit of water

Leaf roller

Symptoms of damage

Leaves become folded or rolled longitudinally
Complete defoliation

Identification of pest

Larva: is smooth green with black head

It is brownish black butterfly

Forewing: has a white spots

Hind wing: has a large white patch

Management

A spray with carbaryl (0.1%) or dimethoate (0.05%) may be undertaken when the severe infestation
Spray the following dissolved in 1 lit of water, Bavisitin 2g +Mancozeb 2g + Teefol 1 ml

Thrips

Symptoms of damage

Leaves become rolled up
Turn pale and gradually dry-up

Identification of pest

Adult is with fringed wings

Management

Spray insecticides like quinalphos 0.025% or phosalone 0.07%