Annals of Plant Protection Sciences
  • Year: 2012
  • Volume: 20
  • Issue: 2

Pest complex of Okra and population dynamics under Bundelkhand region, Uttar Pradesh

  • Author:
  • Chandra Mani, Ram Subhag Singh
  • Total Page Count: 4
  • Page Number: 314 to 317

Department of Entomology, Brahmanand P.G. College, Rath, Hamirpur (U.P.) - 210 431

*Email: singhramsubhag@gmail.com

Online published on 27 December, 2012.

Abstract

The incidence of sap suckers, Amrasca biguttula biguttula, Bemisia tabaci, Nezara viridula, Tetranychus urticae and Earias vitella were first noticed at 4th standard week, while, Aphis gossypii and Dysdercus koenigii in 6th and 5th standard week, respectively. The maximum mean population of Bemisia tabaci (1.70 flies plant−1), Nezara viridula (2.59 bugs plant−10), D. koenigii (8.61 bugs plant−10), T. urticae (23.51 mites leaf−1), shoot damage (8.8%) and fruit damage (15.6%) byE. vittella was observed in cv. Pusa sawani. While A. biguttula biguttula and Aphis gossypii population was maximum 6.33 hoppers plant−1 and 1.83 aphid plant−1 in cv. Karishma and Deepika, respectively. The cv. Deepika had minimum infestation of B. tabaci (1.01 fly plant−1), N. viridula (1.05 bug plant−10), D. koenigii (4.35 bugs plant−10), T. urticae (16.99 mite leaf −1), shoot damage (5.5%) and fruit damage (12.2%) by E. vittella in Bundelkhand Agroclimatic condition. The population of insectpests and mite increased gradually after their first incidence and reached its peak at 10th, 9th, 12th, 12th, 17th and 13th standard week of A. biguttula biguttula, B. tabaci, N. viridula, A. gossypii, D. koenigii and T. urticae, respectively. The shoot damage (20.2%) and fruit damage (30.9%) by Earias vitella were noticed maximum at 13th and 16th standard week.

Keywords

Abelmoschus esculentus, Pest complex, Seasonal occurrance