+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Sources of Variation in the Adult Flight of Walnut Husk Fly (Diptera: Tephritidae): A Phenology Model for California Walnut Orchards



Sources of Variation in the Adult Flight of Walnut Husk Fly (Diptera: Tephritidae): A Phenology Model for California Walnut Orchards



Environmental Entomology 48(1): 234-244



A phenology model of the walnut husk fly, Rhagoletis completa Cresson, was developed to more accurately predict the timing of the flight period and optimize management decisions. A data set of 153 orchard years in which adults were trapped throughout the season was used for the development and validation of this model. Data from California Irrigation Management Information System (CIMIS) weather stations were used to match orchard-year datasets with historical climatic data on degree-day (DD) accumulation, winter chill, and winter rainfall. A cumulative Weibull distribution was used to model the relationship between cumulative trap catch and DD accumulation for R. completa in California. The model was used to predict thermal requirements for the start (5% cumulative trap catch) and mid-point (50% cumulative trap catch) of the flight period, which were 1,670 and 2,179 DDs, respectively. The prediction for 50% cumulative trap catch of R. completa in California was much higher than the thermal requirement estimated in Oregon previously (1,751 DDs). Linear mixed effects models were used to evaluate other environmental and orchard-specific factors which could explain the large variation between predicted and observed thermal requirements for both the start and mid-point of the flight period. Latitude, walnut cultivar leaf-out time, orchard age and year, as a continuous variable, all contributed significantly to explain deviations from the predictions of the DD model for individual orchard years. Such factors can be used both to adjust predicted thermal requirements for these two specific and informative stages of the flight period, and to provide a basis for ecological and evolutionary hypotheses.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 066441300

Download citation: RISBibTeXText

PMID: 30520946

DOI: 10.1093/ee/nvy170


Related references

Seasonal Phenology Of The Walnut Husk Fly, Rhagoletis Completa Cresson (Diptera: Tephritidae). The Canadian Entomologist 128(3): 377-390, 1996

Life cycle, phenology and economic importance of the walnut husk fly Rhagoletis completa Cresson (Diptera: Tephritidae) in northern Italy. Annales de la Societe Entomologique de France 42(2): 245-254, 2006

Walnut husk fly (Diptera: Tephritidae) pest-free and preovipositional periods and adult emergence for stone fruits exported to New Zealand. Journal of Economic Entomology 87(3): 747-751, 1994

Genetic and Cytogenetic Analysis of the Walnut-Husk Fly (Diptera: Tephritidae). Annals of the Entomological Society of America 103(6): 1003-1011, 2010

1429 - Rhagoletis completa Cresson, 1929 - walnut husk fly Diptera Tephritidae. BioRisk, Suppl. (Special Issue) 4: 918-919, 2010

Improving the Monitoring of the Walnut Husk Fly (Diptera: Tephritidae) Using Male-Produced Lactones. Journal of Economic Entomology 111(5): 2032-2037, 2018

Distinguishing characters of the walnut husk maggots of the genus Rhagoletis (Diptera, Tephritidae). Cooperative Economic Insect Report 23(31): 522, 1973

Visual attraction of the walnut husk fly (Diptera: Tephritidae) to color rectangles and spheres. Environmental Entomology 146: 810-814, 1985

Wolbachia infection in the walnut-husk fly Rhagoletis completa Cresson 1929 Diptera Tephritidae. Mitteilungen der Deutschen Gesellschaft fuer Allgemeine und Angewandte Entomologie 18: 243-245, 2012

Walnut husk fly diptera tephritidae evaluation of traps for timing of control measures and for damage predictions. Journal of Economic Entomology 82(4): 1191-1196, 1989

Evaluation of trap designs and attractants for monitoring the walnut husk fly rhagoletis completa diptera tephritidae. Zeitschrift fuer Angewandte Entomologie 91(5): 510-520, 1981

Distinguishing characters of the walnut husk maggots of the genus Rhagoletis (Diptera, Tephritidae). Cooperative econ. lnsect Rep, 2331: 522, 1975

Walnut husk fly,Rhagoletis completa(Diptera: Tephritidae), invades Europe: invasion potential and control strategies. Applied Entomology and Zoology 52(1): 1-7, 2017

Ovipositional preference of the walnut husk fly, Rhagoletis completa (Diptera: Tephritidae) on various fruits, vegetables and varieties of walnuts. Journal of the Entomological Society of British Columbia 92: 3-7, 1995

Evaluation of trap designs and attractants for monitoring the walnut husk fly, Rhagoletis completa Cresson (Diptera: Tephritidae). Zeitschrift Fuer Angewandte Entomologie: 915: 510-520, 1981