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ARS Home » Research » Publications at this Location » Publication #114730
Title: SEASONAL ACTIVITY OF ADULT SILVERLEAF WHITEFLIES IN THE IMPERIAL AND PALO VERDE VALLEYS, CALIFORNIA

Author
item CHU, CHANG CHI
item HENNEBERRY, THOMAS
item NATWICK, ERIC - U CA COOP EXT, HOLTVILLE
item RITTER, DAVID - IC AG COMM. EL CENTRO, CA
item BIRDSALL, STEVE - IC AG COMM, EL CENTRO, CA

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 7/1/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Trap studies were conducted in Imperial and Palo Verde Valleys with the objective of determining the seasonal activity pattern and dispersal activity of adult silverleaf whiteflies. Year round trapping in the Imperial and Palo Verde Valleys, California in 1996, 1997 and 1998 showed low adult trap catches from late October to early June and increasing trap catches with increasing seasonal air temperatures and host availability. Trap catches were adversely affected by wind and rain. CC trap catches were significantly correlated to yellow sticky card and suction trap catches. Higher numbers of silverleaf whitefly adults were caught in CC traps directionally oriented to a silverleaf whitefly infested, untreated cotton field as compared with traps oriented toward Bermuda grass fields, farm roads or fallow areas. Abrupt increases in trap catches of 40 to 50 fold more adults for one to two days followed by abrupt decreases in adult catches suggested dispersal activity of adults from other nearby crop sources.