AgroStar Krishi Gyaan
12 Jul 18, 10:00 AM
Guru GyaanAgroStar Agronomy Centre of Excellence
Management of shoot & fruit borer in okra grown in monsoon season
Infestation of spotted bollworm and Helicoverpa larva is more in okra grown in monsoon season than the summer season. Both the larva damaging to this crop on shoots and fruits.
• On initiation of infestation, spray neem oil 50 ml or neem based formulation 20 ml (1 EC) to 40 ml (0.15 EC0 or Verticillium lacani, a fungus based powder 40 g per 10 litter of water during evening hours. Repeat the same at 10 days interval.
• Install spotted bollworm/ Helicoverpa pheromone traps @ 40 per hectare to reduce the adult population.
• Press the infested shoots with finger to kill the larva in-side or collect & destroy the infested shoots.
• Do regular pickings of the crop.
• At the time picking, separate out the infested fruits and fed to the animals. Over matured fruits should not be remained on the plants.
• Spray Bacillus thuringiensis, a bacterial powder 20 g or B. bassiana, a fungus based powder 40 g per 10 litter of water during evening hours thoroughly.
• Spray HaNPV (Nuclear Polyhedrosis virus) 250 LE with 500 litters of water per hectare during evening hours thoroughly.
• If the infestation is increasing, spray fenvalerate 20 EC 10 ml or chlorantraniliprole 20 SC 3 ml or emamactin benzoate 5 WG 5 g or cyantraniliprole 10 OD 10 ml or deltamethrin 1% + triazophos 35% EC 10 ml or cypermethrin 10 EC 10 ml or deltamethrin 2.8 EC 10 ml or lambda cyhelothrin 4.9 CS 5 ml or pyridyal 10 EC 10 ml or fenobucarb 50 EC 4 ml or quinalphos 25 EC 20 ml in 10 liter of water.
Dr. T. M. Bharpoda,
Ex. Professor of Entomology,
B. A. College of Agriculture, Anand Agricultural University, Anand- 388 110 (Gujarat India)