Controlling Frankliniella Bispinosa (Thysanoptera: Thripidae) On Florida Citrus During Bloom and Increased Fruit Set on Navel And ‘Valencia’ Oranges

Authors

  • Carl C. Childers
  • Robert C. Bullock

Abstract

Four field experiments were conducted during 1995 and 1996 to evaluate increased fruit set of navel and ‘Valencia’ oranges or ‘Marsh’ grapefruit varieties by controlling Frankliniella bispinosa (Morgan) (Thysanoptera: Thripidae) on citrus flowers during bloom. In three experiments, Chlorpyrifos 4EC at 4.68 liters/ha provided 5, 5, and 4 days of effective residual control of F. bispinosa adults on citrus flowers and 3 or more days at 3.16 liters/ha in the remaining experiment. Corresponding lengths of larval thrips control were 12, 12, and 8 days, respectively. The Chlorpyrifos 4EC treatments at 3.16 liters/ha applied on 25 March in the fourth experiment provided 11 or more days of larval thrips control. Use of a single, properly timed insecticide application between maximum bud swell and full bloom, when F. bispinosa or F. kelliae adults are increasing, will increase fruit set. Preventing establishment of larval thrips populations appears to be important.

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Published

1999-09-01

Issue

Vol. 82, No. 3 (September 1999)

Section

Literature Review Articles

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