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Chrysanthemum


Chrysanthemum Aphid


Symptoms of damage

Nymphs and adults suck the sap from under surface of leaves and terminal shoots.
Stunted growth of the plant
Curling of leaf
Withering of flowers.

Identification of pest

Aphids are black (or) chocolate brown in colour

Management

Aqueous spray application of Vercillium lecanii (Vertilec) @ 15 g/lit (108 CFU/g)
Application (ultra low volume) of the entomogenous fungus V.lecanii
Neem formulations can be used in rotation with regular insecticides
Spray any following insecticides malathion 50 EC @ 1 ml/l of water,

Thrips


Symptoms of damage

Infest the flower heads.
Lacerating the sepals and petals causing abrasions
Heavy infestation – damage to corolla, stamens
leading to premature flower drop.
It transmits the tomato spotted wilt virus, necrotic spot virus to many floricultural crops.

Identification of pest

Adult – slender, white to black in colour

Management

Grow resistant varieties like
Chandrika, Bangalore Local Yellow Double, M-7, Pankaj and Yellow Star.
Field sanitation.
Remove weeds that harbour virus from inside and outside the greenhouse.
Yellow or blue sticky traps can be used for mass trapping of thrips.
Blue traps – more effective for mass trapping than yellow traps.
Release of nymphs and adults of predatory minute pirate bug, Orius insidiosus.
Spray dimethoate 30 EC @ 1 ml/litre or fenitrothion 50 EC @ 1.0 ml/litre malathion 50 EC @ 2 ml/litre
Application of spinosad very effective against thrips .

Flower Feeder


Symptoms of damage

Caterpillars feed on buds and flowers.

Identification of pest

Young caterpillar – yellowish white and gradually green in colour

Adult – medium sized, light brown and V shaped speck on the fore wings

Male – fore wings are green in colour

Female – fore wings are brown in colour

Management

Field sanitation
Collect and destroy damaged buds and flowers
Set up pheromone traps with Helilure at 15/ha
Spray nuclear polyhedrosis virus (Ha NPV) at 500 LE or 1.5*1012 POBs/ha
Encourage the activity of parasitoids campoletis and chelonus
Spray carbaryl 50 WP 2g/lit.