Agricultural and Forest Entomology (2021) 23, 189-202

Francis A. Drummond, Judith A. Collins, Cesar Rodriguez-Saona and Aijun Zhang (2021)
Use of forested field edges by a blueberry insect pest, Rhagoletis mendax (Diptera: Tephritidae)
Agricultural and Forest Entomology 23 (2), 189-202
Abstract: 1. The blueberry maggot fly, Rhagoletis mendax Curran, is a pest of wild and highbush blueberries. In wild blueberries, most flies colonize fields from forest edges annually. Flies were associated with forest canopies adjacent to colonized fields.
2. Flies were captured up to 6 m high (limited by trap placement height) and may occur at greater tree heights. Fly abundance relative to tree species was highest in red oak.
3. Releases of marked flies from tree canopies showed that release height had no effect on distance into the field that flies dispersed. This is important because the main fly control tactic is the application of a 25- to 30-m-wide swath of insecticide along field perimeters.
4. In the laboratory, flies preferred leaves and leaf extracts of red oak compared to other leaf tree and shrub species, including blueberry. Electroantennographs demonstrated that the female antennae consistently responded to compounds extracted from red oak leaves. Mass spectra and gas chromatograph retention times of five antenna-active compounds matched those of (i) trans-β-ocimene, (ii) linalool, (iii) 4,8-dimethyl-1,3,7-nonatriene, (iv) indole, and (v) trans-nerolidol.
5. We speculate flies recruit to trees before movement into blueberry fields primarily for food, as supported by their arrestment response to leaf extracts.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Cesar R. Rodriguez-Saona, Aijun Zhang

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhagoletis mendax	Blueberry/cranberry (Vaccinium)	U.S.A. (NE)