Title: A Comparison of Traps and Tap Sampling for Monitoring Adult Asian Citrus Psyllid, Diaphorina Citri Kuwayma (Homoptera: Psyllidae), in Citrus Authors
Submitted to: Entomological Society of America Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: September 1, 2006
Publication Date: December 12, 2006
Citation: Hall, D.G., Ciomperlik, M.C., Hentz, M.G., Wenninger, E. 2006. A comparison of traps and tap sampling for monitoring adult Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae), in citrus [abstract]. The 54th Annual Meeting of the Entomological Society of America, December 12, 2006, Indianapolis, Indiana. D034. Technical Abstract: The Asian citrus psyllid, Diaphorina citri Kuwayama, was first found in Florida during June 1998 and subsequently spread throughout the state's citrus-growing regions. D. citri vectors the bacterium, Candidatus Liberibacter asiaticus, responsible for citrus greening disease (huanglongbing). Citrus greening was found in southern Florida during late August 2005. To help slow the spread of the disease and make managment decisions for the psyllid it is imperative that a sampling technique be developed to monitor populations of adult psyllids. The presence or relative abundance of adult Diaphorina citri in a planting of citrus can be determined by counting adults on plant samples or by trapping. In this study we compared a tapping method (tapping an infested branch, which promotes adults to drop on to a pan held beneath the branch) against several trap types used to catch adult psyllids. The traps included yellow and blue sticky cards, CC traps (red, yellow, blue, green, black, white bases) either with ethylene glycol or a dichlorvos strip as the kill agent, and the Multi-Lure trap with ethylene glycol or dichlorvos strip. Yellow sticky card traps captured significantly more adult Diaphorina citri over the 4 wk study (7.2 adults / trap /wk) than blue sticky card traps (4.8 adults / trap /wk). Both of these sticky card traps captured significantly more adult D. citri than any of the other traps (0.1 - 0.6 adults / trip /wk). There were no significant differences among the CC and Multi-Lure traps with respect to numbers of adults captured. There was no evidence of any difference with respect to charging CC and Multi-Lure traps with ethylene glycol or dichlorvos strips. Tap samples indicatd a uniform dispersion of adult D. citri among the trees studied, with means ranging from 1.0 to 1.6 adults per sample per tree. Trap captures of adults per week on yellow sticky cards were 3.3 to 9.0 times greater than the number of adults per tap sample. All over, tap sampling indicated 69.1% of the trees studied were infested during the study. Adult D. citri were collected on yellow and blue sticky card traps in every tree sampled. Percentage detection of adults using the other trap types ranged from 10 to 40% (no signficant differences).