Comparative Responses of Rhagoletis zephyria and Rhagoletis pomonella (Diptera: Tephritidae) to Commercial and Experimental Sticky Traps and Odors in Washington State

2017 ◽  
Vol 46 (6) ◽  
pp. 1351-1358
Author(s):  
Wee L Yee ◽  
Robert B Goughnour ◽  
Jeffrey L Feder ◽  
Charles E Linn ◽  
Dong H Cha
Keyword(s):  
Washington State ◽  
Rhagoletis Pomonella ◽  
Sticky Traps ◽  
Rhagoletis Zephyria

scholarly journals Distinct Adult Eclosion Traits of Sibling Species Rhagoletis pomonella and Rhagoletis zephyria (Diptera: Tephritidae) Under Laboratory Conditions

2020 ◽  
Author(s):  
Wee L Yee ◽  
Robert B Goughnour ◽  
Jeffrey L Feder
Keyword(s):  
Genetic Variation ◽  
North America ◽  
Host Plants ◽  
Washington State ◽  
Phytophagous Insects ◽  
Rhagoletis Pomonella ◽  
Western North America ◽  
Adult Eclosion ◽  
Key Features ◽  
Rhagoletis Zephyria

Abstract Closely related phytophagous insects that specialize on different host plants may have divergent responses to environmental factors. Rhagoletis pomonella (Walsh) and Rhagoletis zephyria Snow (Diptera: Tephritidae) are sibling, sympatric fly species found in western North America that attack and mate on plants of Rosaceae (~60 taxa) and Caprifoliaceae (three taxa), respectively, likely contributing to partial reproductive isolation. Rhagoletis zephyria evolved from R. pomonella and is native to western North America, whereas R. pomonella was introduced there. Given that key features of the flies’ ecology, breeding compatibility, and evolution differ, we predicted that adult eclosion patterns of the two flies from Washington State, USA are also distinct. When puparia were chilled, eclosion of apple- and black hawthorn-origin R. pomonella was significantly more dispersed, with less pronounced peaks, than of snowberry-origin R. zephyria within sympatric and nonsympatric site comparisons. Percentages of chilled puparia that produced adults were ≥67% for both species. However, when puparia were not chilled, from 13.5 to 21.9% of apple-origin R. pomonella versus only 1.2% to 1.9% of R. zephyria eclosed. The distinct differences in eclosion traits of R. pomonella and R. zephyria could be due to greater genetic variation in R. pomonella, associated with its use of a wider range of host plants than R. zephyria.

scholarly journals Economic Impact of a Potential Expansion of Pest Infestation: Apple Maggot in Washington State

2018 ◽  
Vol 28 (5) ◽  
pp. 651-659
Author(s):  
Suzette P. Galinato ◽  
R. Karina Gallardo ◽  
David M. Granatstein ◽  
Mike Willett
Keyword(s):  
Insect Pest ◽  
Cydia Pomonella ◽  
Codling Moth ◽  
Commercial Production ◽  
Washington State ◽  
Rhagoletis Pomonella ◽  
Pest Infestation ◽  
Additional Costs ◽  
Apple Production ◽  
Production Areas

Apple maggot (Rhagoletis pomonella) is an insect pest of apple (Malus domestica) that is currently limited in extent in the commercial production areas of Washington State thanks to a quarantine program. We estimate the costs to the Washington economy if this pest were to spread more widely. Apple maggot control costs are related to the pressure of codling moth (Cydia pomonella), the most prevalent insect pest in commercial apple production in Washington State. It was found that the losses for the Washington apple industry’s range from $510 million to $557 million, depending on the codling moth pressure. Our findings underscore the importance of an efficient quarantine program that minimized the risk of spreading the pest along with additional costs associated with quarantined areas.

Mating frequencies and production of hybrids by Rhagoletis pomonella and Rhagoletis zephyria (Diptera: Tephritidae) in the laboratory

2011 ◽  
Vol 143 (1) ◽  
pp. 82-90 ◽  
Author(s):  
Wee L. Yee ◽  
Robert B. Goughnour
Keyword(s):  
Sibling Species ◽  
Mating Frequency ◽  
Rhagoletis Pomonella ◽  
Hybrid Offspring ◽  
Low Levels ◽  
Rhagoletis Zephyria

AbstractEvidence indicates low levels of hybridization in nature between the apple maggot (AM), Rhagoletis pomonella (Walsh), and snowberry maggot (SB), Rhagoletis zephyria Snow, sibling species in the R. pomonella complex. We determined the effects of AM and SB pairings on mating frequencies and production of hybrid offspring in the laboratory. Mating frequency was lowest in SB female × AM male pairings, higher in AM female × SB male and AM female × AM male pairings, and highest in SB female × SB male pairings. A greater percentage of AM female × AM male pairs produced offspring (puparia) than did AM female × SB male and SB female × AM male pairs, and a greater percentage of AM female × SB male pairs produced puparia than did SB female × AM male pairs. Male or female F1 hybrids backcrossed with AM males and with other F1 hybrids were fertile. Results suggest most R. pomonella × R. zephyria hybrids found in nature are the result of R. zephyria males mating with R. pomonella females, with few from reciprocal matings. If true, this asymmetry could lower the incidence of hybridization in nature.

OPIINE PARASITOIDS (HYMENOPTERA: BRACONIDAE) OF RHAGOLETIS POMONELLA AND R. ZEPHYRIA (DIPTERA: TEPHRITIDAE) IN THE WILLAMETTE VALLEY, OREGON

1985 ◽  
Vol 117 (2) ◽  
pp. 163-166 ◽  
Author(s):  
M. T. AliNiazee
Keyword(s):  
Host Shift ◽  
Apple Fruit ◽  
Rhagoletis Pomonella ◽  
Willamette Valley ◽  
Introduced Populations ◽  
Rhagoletis Zephyria

AbstractTwo species of opiine (Braconidae) parasitoids, Opius lectoides Gahan and O. downesi Gahan parasitized Rhagoletis zephyria Snow and R. pomonella (Walsh) in the Willamette Valley, OR. Almost equal numbers of O. lectoides and O. downesi were recorded from R. zephyria, whereas about 91% of the opiines associated with R. pomonella were O. downesi. In general, percent parasitization of R. pomonella was variable from sample to sample, but substantially higher on hawthorn than on apple fruit. It appears that both the opiine species have made a rapid host shift from R. zephyria to newly introduced populations of R. pomonella.

scholarly journals The Eclosion of Rhagoletis pomonella (Diptera: Tephritidae) Under Different Chill Durations and Simulated Temperate and Tropical Conditions

2021 ◽  
Author(s):  
Lisa G Neven ◽  
Tewodros Wakie ◽  
Wee L Yee
Keyword(s):  
North America ◽  
Environmental Conditions ◽  
Pupal Stage ◽  
Washington State ◽  
Rhagoletis Pomonella ◽  
Tropical Country ◽  
Apple Maggot Fly ◽  
Tropical Conditions ◽  
The Tropics ◽  
D 23

Abstract The apple maggot fly, Rhagoletis pomonella (Walsh) (Diptera: Tephritidae), is a serious pest of apple in North America that is subject to quarantine measures to prevent its spread to currently pest-free regions, including the tropics. How the fly may survive in warmer climates is unclear. Here, we studied the effects of exposing postchill puparia to simulated temperate and tropical environmental conditions on eclosion of R. pomonella from Washington State, U.S.A. Puparia were chilled for 0–30 wk at 3°C and then held under four postchill conditions: A = 23°C, 16:8 L:D, 40% RH; B = 26°C, 12:12 L:D, 80% RH; C = 26°C, 16:8 L:D, 80% RH; and D = 23°C, 12:12 L:D, 40% RH, with B and D representing tropical conditions and A and C temperate conditions. Within each chill duration, total numbers of flies eclosed were equally high in tropical treatment B and temperate treatment C, while they were lower in treatments A and D. Mean weeks of the first eclosion in treatments B and C were earlier than in treatment D; mean week of peak eclosion and 50% eclosion in treatments A, B, and C were earlier than in treatment D. Eclosion spans in treatments A, B, and D were generally shorter than in treatment C. Results suggest that if introduced into a humid tropical country, R. pomonella puparia from Washington State could produce adult flies, regardless of chill duration or lack of chilling during the pupal stage, but whether flies could establish there would require further study.

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