Anthurium

Mango Stem Borer

Symptoms of damage

Nymphs and adults suck the plant sap

Yellowing and distortion of leaves and poor growth.

Honeydew excretion causes black sooty mould fungus.

Management

Spraying of any following insecticides

dicofol 2ml/lit

malathion 2ml/lit

phosphomidon 2ml/lit

A formulation containing pyrethrum extract gave effective control

Field release of parasitic wasp Aphidius colemani 5/m2 per week

Thrips

Symptoms of damage

Nymphs and adults suck the sap from leaves

Mottled effect on foliage and flowers.

Management

In netted areas, insecticide granules are very effective in decreasing injury to flowers by C. orchidii

Foliar sprays cyfluthrin 2.0 EC and chlorpyriphos 1ml/lit are effective in reducing the number of injured flowers.

Spraying of dimethoate 30 EC @ 1 ml/l also controls thrips.

Field release of predatory mite Amblyseius cucumeris 500,000/ha

Whitefly

Symptoms of damage

Nymphs and adults suck the sap from leaves.

Management

Systemic insecticides like methomyl 1.8 L or dimethoate 30 EC ( reduced eggs, nymphs, pupae and adults.)

Malathion 50 EC is effective against adults and pupae.

Bifenthrin 10 WP was effective only against adults.

Methomyl 1.8 L and acephate 75 SP reduced the number of nymphs and pupae

Field release of parasitic wasp – Encarsia formosa 3/m2 can be followed

Red spider mite

Symptoms of damage

Spider mie causes – yellowish mottling of the leaves

Leaves shrivel and turn brown.

A fine web spun on the undersurface of leaves.

Identification of pest

Nymphs and adults are red in colour.

Eggs are laid on the ventral surface of the leaves and are whitish, spherical in shape

Management

Spraying the affected plants with dicofol 18.5 EC @ 0.8 ml/l of water.

Field release of predatory mite – Phytoseiulus persimilis 6/ m2

Source: https://agritech.tnau.ac.in/