Influence of Whitefly Population Level on Distribution in Field and Stickiness of Lint

J. E. Leggett and Osama ElLissy


Pan samples for whitefly adults taken at edge of cotton field were three times greater than samples taken 15 m into field. The differences for samples of eggs and immatures per leaf disc taken at edge of and 15 m into cotton fields were similar to adult counts. The greatest differences occurred on week of 2 August, 1993 with the east side of the fields having higher counts of all whitefly forms. Whitefly counts taken at 10 or 30 m into cotton field were very similar. Horizontal sticky yellow cards located 15 cm above the soil surface captured the greatest number of whitefly adults when horizontal and vertical yellow cards were compared at 15 and 60 cm above soil surface. Fields with north-south rows had a biased whitefly population with higher counts on the east side of the field, but fields with east-west rows had a more even distribution.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pg. 1249
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998