Journal of Entomological Research
SCOPUSWeb of Science
  • Year: 2009
  • Volume: 33
  • Issue: 3

Effect of different doses of nitrogen on insect pest attack and yield potentiality of Okra, Abelmonschus esculentus (L.) Moench at terai ecology of West Bengal

  • Author:
  • Supriya Biswas, B. Mahato1, P. Panda1, S. Guha2
  • Total Page Count: 4
  • Page Number: 219 to 222

Department of Agricultural Entomology, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal - 736 165, India.

1 Corresponding author's address: Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal - 736 165, India.

2 Department of Vegetable and Spice Crops, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal - 736 165, India.

Abstract

Results indicated that nitrogen plays an important role on the intensity of insect pests. Highest number of jassid/leaf, whitefly/leaf and bored fruit was found when nitrogen was applied@ 150 kg/ha. The pests populations were high at this dose as compared to those at low nitrogen doses as well as control. A positive correlation between insect pest and nitrogen was found. A direct correlation of yield and nitrogen was also found but, after a certain limit of nitrogen use the yield did not increase significantly.