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ARS Home » Research » Publications at this Location » Publication #93206
Title: EVALUATION OF CC TRAP COLOR AND PLACEMENT IN VARIOUS CROPS

Author
item CHU, CHANG CHI
item HENNEBERRY, THOMAS
item NATWICK, ERIC - UOFC COOP. EXT. HOLTVILLE

Submitted to: National Research and Action Plan for Silver Leaf Whitefly
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: CC traps were placed 15 cm above the cotton canopy, at the top of canopy, and 15 cm below the canopy top. The study was conducted from 15 Jul-12 Aug 1996. Tests were conducted in fields in CA and AZ in 1996 and 1997 with trap bases of 10 different colors. In choice and non-choice studies, CC traps were placed 15, 45, 75, 105 and 135 cm above furrows in a cotton field from 15 Jul-18 Sep 1997. Highest adult whitefly catches occurred in traps placed at the 75 cm above the furrows on 15 July. Adult whiteflies caught gradually increased in traps placed at higher levels from late Jul to mid-Sep. Adult whitefly catches were closely related to leaf-turn counts from 20 Aug-18 Sep in the choice and the non-choice studies. CC trap heights were compared in harvested cotton fields in choice and non-choice studies from Aug to Oct 1996. Adult whitefly catches were highest when the traps were placed at 15 cm high followed by 30, 45, 60, and 70 cm. Adults caught with traps at 15 cm high were 32.2 adults/24 h for the no-choice study and 19.3 for the choice study, respectively. CC trap catches in a fall-planted cabbage field were compared with traps base placed at 5 or 20 cm above the surface of cabbage beds. Adults caught were 42.4 and 26.4 adults/trap/24 h for 5 and 20 cm, respectively. In a fall-planted lettuce field, number of adults caught were 5.9 and 2.7 adults/trap/24 h for 5 and 20 cm respectively.