Understanding the seasonal and reproductive biology of olive fruit fly is critical to its management
Hannah J. Burrack, North Carolina State University
Ray Bingham, California Department of Food and Agriculture
Richard Price, Butte County
Joseph H. Connell, UC Cooperative Extension
Phil P. Phillips, IPM
Lynn Wunderlich, UCCE Amador
Paul M. Vossen, UCCE Sonoma
Neil V. O'Connell, UCCE Tulare County
Louise Ferguson, UC Davis
Frank G. Zalom, UC Davis
California Agriculture 65(1):14-20. DOI: 10.3733/ca.v065n01p14.
The olive fruit fly was first detected in Los Angeles in 1998 and in all the olive-growing regions of California soon after. Following its initial detection, UC researchers and Cooperative Extension farm advisors, county agricultural commissioners and the California Department of Food and Agriculture Pest Detection and Emergency Project established a statewide monitoring program to determine the extent of the olive fruit fly's occurrence, track its seasonal biology and evaluate monitoring tools. Fly populations and infestations can reach high levels throughout California but tend to be lower in the San Joaquin Valley. Trap captures typically exhibit a bimodal distribution with peaks in the spring and fall. Olive infestation is related to fly densities, climate and fruit size. Gravid, mated females vary in density throughout the year but are present at some level year-round. The data is being used to develop models that will better predict when the adults are active and olives are at risk.
H. J. Burrack is Assistant Professor of Entomology, North Carolina State University, Raleigh; R. Bingham is Entomologist, Plant Industry, California Department of Food and Agriculture; R. Price is Agricultural Commissioner, Butte County; J. H. Connell is Farm Advisor, UC Cooperative Extension (UCCE) Butte County; P. A. Phillips is Regional IPM Farm Advisor, retired; L. Wunderlich is Farm Advisor, UCCE Amador and El Dorado counties; P. M. Vossen is Farm Advisor, UCCE Sonoma and Marin counties; N. V. O'Connell is Farm Advisor, UCCE Tulare County; L. Ferguson is Professor of Plant Sciences, UC Davis; F. G. Zalom is Professor of Entomology, UC Davis;
The authors would like to thank 19 trappers for collecting data from 28 locations in 16 counties over the course of 4 years.