Whitefly population on different cotton varieties in punjab | [Sarhad Journal of Agriculture • 2010]

Author(s):

1. IDREES AHMAD NASIR: Centre of Excellence in Molecular Biology, University of the Punjab, Lahore - Pakistan

2. SALEEM HAIDER: School of Biological Sciences,University of the Punjab, Lahore - Pakistan.

3. SOBIA CHOHAN: Ayub Agricultural Research Institute, Faisalabad - Pakistan.

4. NOOR-UL-ISLAM: Department of Plant Pathology, University of Agriculture, Faisalabad - Pakistan.

5. MUHAMMAD ASLAM KHAN: Department of Plant Pathology, University of Agriculture, Faisalabad - Pakistan.

6. RASHIDA PERVEEN: Department of Plant Pathology, University College of Agriculture, Bahauddin Zakariya University, Multan - Pakistan.

Abstract:

Whitefly population was high with mean value 9.25 in 1999 as compared to mean value 5.57 during 2000. Out of 64 cotton varieties infested with whitefly population, 51 exhibited economic threshold level (five nymphs and or adults per leaf) in 1999 but 38 varieties were found in 2000.Peak population was observed at the end of growing season i.e. between 10th and 24th September during both years.

Page(s): 583-589

DOI: DOI not available

Published: Journal: Sarhad Journal of Agriculture, Volume: 26, Issue: 4, Year: 2010

Keywords:

cotton varieties , whitefly population , economic threshold level

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