Economic Threshold Level (ETL) of Paddy 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.

Economic Threshold Level (ETL) of Paddy Insect Pests

Name of the Insect Pests	Economic threshold level
Brown plant hopper	5-10 hoppers/hill.
Green plant hopper	10-20 hoppers/hill.
White back plant hopper	10-20 hoppers/hill.
Rice Hispa	1-2 adults/hill.
Stem borer	One egg mass/sq.mt. or 5% dead hearts.
Gundhi bug	1-2 bugs/hill.
Gall midge	One silver shoot/sq.mt.
Armyworm	One larvae/hills.
Grasshoppers	One number/hill.
Thrips	10 thrips per leaf.
Whorl maggot	20% damaged hills.
Case worm	1-2 cases/hill.
Leaf folder	One damaged leaf/hill.