Journal of Entomological Research

SCOPUSWeb of Science
  • Year: 2019
  • Volume: 43
  • Issue: 3

Seasonal population dynamics of cotton jassid (Amrasca devastans) in different cotton varieties under field conditions

  • Author:
  • Muhammad Usman Asif, Raza Muhammad, Muhammad Hamayoon Khan, Mubasshir Sohail
  • Total Page Count: 4
  • Page Number: 315 to 318

Plant Protection Division, Nuclear Institute of Agriculture, Tando Jam – 70060, Pakistan

*Corresponding author's E-mail: uakhan1987@hotmail.com

Online published on 12 November, 2019.

Abstract

In present study, six cotton varieties were observed for seasonal population dynamics of jassid. The lowest mean population of jassid per leaf was recorded in IUB-13 (0.27) and FH-598 showed highest population (0.36/leaf). Jassid infestation increased in the 4th week of June and exceeded threshold level during July. The month of July was most favorable for jassid increase and recorded its peak abundance. Correlation matrix revealed that population of jassid correlated positively with relative humidity, minimum temperature and rainfall but negative association was observed with maximum temperature and sunshine.

Keywords

Climatic factors, correlation, cotton, jassid, varieties