This is how to diagnose stem fly infestation in soybean crop

The maggot of this insect lives inside the white-coloured stem. The adult insect is shiny black in size of two km.
The female of this pest lays yellow-coloured eggs on the leaves. From which the maggots enter the stem making holes by piercing the leaves’ veins and making the stem hollow.
Due to this, the leaves appear yellow in the initial stage of the plant. Later the whole plant turns yellow
To control stem fly, use Novalaxam (Lambdacylothrin 9.5% + Thiomethaxom 12.9% Z \C) 50 ml per acre or Cover (Chlorantraniliprole 18.5% SC) 60 ml per acre.

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The maggot of this insect lives inside the white-coloured stem. The adult insect is shiny black in size of two km.

The female of this pest lays yellow-coloured eggs on the leaves. From which the maggots enter the stem making holes by piercing the leaves’ veins and making the stem hollow.

Due to this, the leaves appear yellow in the initial stage of the plant. Later the whole plant turns yellow

To control stem fly, use Novalaxam (Lambdacylothrin 9.5% + Thiomethaxom 12.9% Z \C) 50 ml per acre or Cover (Chlorantraniliprole 18.5% SC) 60 ml per acre.