Control of Immature Sweetpotato Whitefly (SPWF) and Tomato Pinworm (TPW) in Staked Tomato, Spring, 1993

Cultural practices, experimental design, application methods and dates are given in report 123E. Whitefly nymphs, pupae and tomato pinworm larvae were evaluated from one trifoliate randomly sampled from each row in each plot giving 9 leaflets per plot. The trifoliate was taken from the 5th, 6th or 7th leaf from the top, at highest position pupal exuviae were observed. All whitefly stages were counted which appeared in a 1 cm2 arena placed in 4 positions on the leaf, 2 on either side of the midvein. Numbers of tomato pinworm larvae were counted from the entire trifoliate. Six plants per row (18 per plot) were harvested and picked clean on 24 May. Fruit was graded for size, weight, damage and marketability. Marketable tomatoes were kept in paper sacks in the laboratory to evaluate for irregular ripening.