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ARS Home » Research » Publications at this Location » Publication #102567
Title: SILVERLEAF WHITEFLY ADULTS CAUGHT IN CC TRAPS AT DIFFERENT TRAP HEIGHTS ANDTRAP CATCH RELATIONSHIPS TO LEAF-TURN COUNTS ON COTTON.

Author
item Chu, Chang Chi
item Henneberry, Thomas
item NATWICK, ERIC - COOP RES, HOLTVILLE, CA

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 5/15/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The effects of trap placement on silverleaf whitefly, Bemisia argentifolii Bellows and Perring, adult catches in CC traps in cotton fields were studied in California and Arizona in 1996 and 1997. In a no-choice study in 1996, more adults were caught in traps placed 15 cm below the top of the cotton canopy compared with traps placed at canopy top or 15 cm above the plant canopy. Traps caught more whitefly adults in the Stoneville 474 and Louisiana 887 plots compared with traps placed in the Deltapine 5415 and 5461 plots, reflecting the same differences in adult populations on the leaves, as determined using the leaf-turn method. In a no-choice trap study in 1997, trap catches were significantly correlated with leaf-turn counts with traps placed at the top of cotton beds, 30, 60, 90 and 120 cm above plant beds. Significant correlations occurred from 21 August to 18 September when the leaf-turn adult counts were 54 or more adults per ten leaves. In a choice study in 1997, adult whitefly trap catches from 14 August to 18 September in traps placed from 30 to 120 cm above cotton beds were significantly correlated with adult leaf-turn counts.