1)Thrips: If it is not controlled properly, can cause yield loss up to 50%. Mostly observed in dry weather. They suck sap from the foliage and results in curling of leaves, leaves become cup shaped or curved upward.
To check severity of thrips incidence, keep blue sticky traps @6-8 per acre. If infestation observed in field take spray of Fipronil@30 ml/15 Ltr water or Profenophos@10 ml or Carbosulfan@10 ml+ Mancozeb@25 gm/10 Ltr water by 8-10 days interval.
2)Maggots: Infestation observed in January-February Month. They feed on roots cause browning of leaves. Base of plant become watery.
If infestation is observed, apply Carbaryl@4 kg or Phorate@4 kg to the soil and give light irrigation. Apply Chlorpyriphos @1 Ltr/acre alongwith irrigation water or sand.