Expert Advisory Details

Posted by PAU, Ludhiana

Punjab

2020-09-01 16:36:37

PAU Advisory for Cotton Crop

COTTON

1. Do not allow cotton crop to suffer for want of water during flowering and fruiting stages, otherwise a lot of shedding of flowers and bolls will take place resulting in poor yield. To hasten boll opening last irrigation may be given at the end of September.

2. If the damage/population of sucking insect pests reaches economic threshold levels, spray the crop with Ulala 50 WG (flonicamid) @ 80g/acre or Osheen 20 SG (dinotefuran) @ 60g/ acre or Polo/Craze/Ruby/Ludo/Shoku 50 WP (diafenthiuron) @ 200g/acre or Lano/Daita 10 EC (pyriproxifen) @ 500 ml acre or Oberon/Voltage 240 SC (spiromesifen) @ 200ml/acre or Applaud 25 SC (buprofezin) @ 400ml/ acre for the control of whitefly. For the control of jassid, use Keefun 15 EC (tolfenpyrad) or Osheen 20 SG @ 60g per acre or Ulala 50 WG @ 80g/acre or Confidor or Confidence or Imidacel or Markdor (imidacloprid) @ 40 ml/acre or Actara/Extra super/Dotara/Thomson (thiamethoxam) 25 WG @ 40 g/acre in 125-150 litres of water with manually operated knapsack sprayer. To check the attack of grown up American bollworm larvae prefer to spray 2 litres chlorpyriphos 20 EC or Tracer 48 SC (spinosad) @ 60 ml or Avaunt 15 SC

(indoxacarb) @ 200 ml per acre. Repeat the spray if it rains within 24 hours of spraying. Mealy bug infested rows/plants should be sprayed with 500 ml buprofezin 25 EC in 125 - 150 litres of water.

3. To get higher yields, give four sprays of 2% potassium nitrate 13:0:45 (2 kg potassium nitrate in 100 litres of water) at weekly intervals starting from flower initiation.

4. Do not use synthetic pyrethroids on cotton for the control of bollworm complex after midSeptember.

5. To control fungal foliar leaf spots, the crop should be sprayed with Amistar Top or 200 ml/acre in 200 liters of water at 15-20 days interval.