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Economic Threshold Level (ETL) of Cotton Insect Pests

Economic Threshold Level (ETL)

It is the pest density at which control measures should de applied to prevent an increasing pest population  from reaching the economic injury level    

Name of the Insect Pests

Economic threshold level

Bollworms complex

5% incidence level in shed fruiting bodies.

American bollworm

One egg or larvae per plant.

assids

2 jassids/leaf.

Whitefly

8-10 adults or 20 nymphs per leaf during early morning.

Aphids

10-29% affected plants.

Thrips

10 thrips per leaf or 15-20% affected plants.

Nematode

1-2 larvae per g of soil.

Rodents

15 live burrows per ha.

Stem weevil

10% damage plants.

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Please note that this is the opinion of the author and is Not Certified by ICAR or any of its authorised agents.