Correlation of the Nest Density and the Number of Workers in Bait Traps for Fire Ants (Solenopsis invicta) in Southern China

Yongyue Lu, Lei Wang, Yijuan Xu, Ling Zeng, Ningdong Li


The relationship between Solenopsis invicta nest density and the number of fire ant workers in bait traps and percentages of traps capturing ants were investigated in the waste land of Wuchuan, Guangdong, South China. The results showed that fire ant nest density is positively correlated with the number of workers captured in traps, and could be described by N=60.53LnD +348.0D+421.1. The workers exceeded 200 and 300 in bait traps while the density of fire ant nests was over 0.023 and 0.084 ind./m2, respectively. The percentages of traps capturing ants were also positively correlated with fire ant nest density and fit by Pe=1/(1+e0.9694-309.85D). When the nest density was over 0.018 ind./m2, over 99% of traps captured fire ant workers. N=8.8796e0.0346Pe was the fitting line for worker amount and trap percentage. The workers per trap were about 50, 100, and 200 when the trap percentages were 50%, 70% and 90%, respectively.


fire ants; Solenopsis invicta; nest density; bait traps

Full Text:



Adams, C.T., W.A. Banks & C.S. Lofgren. 1988. Red imported fire ant (Hymenoptera: Formicidae): correlation of ant density with damage to two cultivars of potatoes (Solanum tuberosum L.). J. Eco. Ent. 81(3):905-909.

Apperson, C.S., E.E. Powell.1983. Correlation of the red imported fire ant (Hymenoptera: Formicidae) with reduced soybean yields in North Carolina. J. Eco. Ent. 76(2):259- 263.

Banks, W.A., C.T. Adams & C.S. Lofgren. 1991. Damage to young citrus trees by the red imported fire ant (Hymenoptera: Formicidae). J. Eco. Ent. 84(1):241-246.

Bao, S.Z., L. Kafle & C.J. Shih. 2011. A new baited trap for monitoring Solenopsis invicta (Formicidae: Hymenoptera) in Taiwan. Appl. Entomol. Zool. 46:165-169.

Briano, J.A., D.F. Williams, D.H. Oi & L.R. Davis Jr. 2002. Field host range of the fire ant pathogens Thelohania solenopsae (Microsporida: Thelohaniidae) and Vairimorpha invictae (Microsporida: Burenellidae) in South America. Bio. Control. 24(2002):98-102.

Huang, J., Y.J. Xu, Y.Y. Lu & G.W. Liang. 2011. Changes to the spatial distribution of Ageratum conyzoides (Asterales:Asteraceae) due to red imported fire ant Solenopsis invicta (Hymenoptera: Formicidae) in China. J. Insect Behav. 24(4):307-316.

Kemp, S.F., R.D. deShazo, J.E. Moffitt, D.F. Williams & W.A. Buhner 2nd. 2000. Expanding habitat of the imported fire ant (Solenopsis invicta): a public health concern. J. Allergy Clin. Immunol. 105(4):683-91.

Lofgren, C.S., W.A. Banks & B.M. Glancey. 1975. Biology and control of imported fire ants. Ann. Re. Ent. 20:1-30.

Lofgren, C.S., D.E. Weidhaas. 1972. On the eradication of imported fire ant: a theoretical appraisal. Bul. Ent. Soc. Am. 18:17-20.

McCubbin, K.I., J.M. Weiner. 2002. Fire ant in Australia: a new medical and ecological hazard. Med. J. Aust. 176(11):518-519.

Oi, D.H., C.A. Watson & D.F. Williams. 2004. Monitoring and management of red imported fire ants in a tropical fish farm. Flo. Ent. 87(4):522-527.

Pascoe, A. 2002. Strategies for managing incursions of exotic animals to New Zealand. Micronesia. 6:129-135.

Sterling, W.L. 1978. Fortuitous biological suppression of the boll weevil by the red imported fire ant. Env. Ent. 7:564-568.

Williams, D.F., D.H. Oi, S.D. Porter, R.M. Pereira & J.A. Briano. 2003. Biological control of imported fire ants (Hymenoptera: Formicidae). Am. Ent. 49(3):150-163.

Williams, D.F., H.L. Collins & D.H. Oi. 2001. The red imported fire ant (Hymenoptera: Formicidae): an historical perspective of treatment programs and the development of chemical baits for control. Am. Entomol. 46:146-159.

Zappalà , L., M.A. Hoy & R.D. Cave. 2007. Interactions between the red imported fire ant, the citrus leafminer, and its parasitoid Ageniaspis citricola (Hymenoptera: Encyrtidae): laboratory and field evaluations. Biocontrol Sci. Techn. 17: 353-363.

Zeng, L., Y.Y. Lu, X.F. He, W.Q. Zhang & G.W. Liang. 2005. Identification of red imported fire ant Solenopsis invicta to invade mainland China and infestation in Wuchuan, Guangdong. Chin. Bul. Ent. 42(2):144-148.



  • There are currently no refbacks.

JCR Impact Factor 2018: 0.504