The stem fly usually affects sweet corn seedlings during the early growth stages, especially under high humidity. Warm and humid conditions are favourable for the occurrence of this pest.
Damage Symptoms:
Small pinhole entry points at the base of young corn plants can be observed.
Yellowing and wilting of young leaves.
Larvae tunnel through the stem, leading to the weakening of the plant.
Severe infestations may kill seedlings or stunt growth.
Preventive Measures:
Practice crop rotation.
Ensure good drainage to prevent damp conditions that favour the pest's occurrence.
Control Measures:
Foliar spray of imidacloprid at 0.5 ml/l or thiamethoxam at 0.2 g/l
