Arthropod-Plant Interactions (2015) 9, 487-496

D. Lightle, M. Dossett, T. Ebert, C.E. Finn, R.R. Martin and J.C. Lee (2015)
Effects of three novel resistant black raspberry selections on Amphorophora agathonica feeding behavior and performance
Arthropod-Plant Interactions 9 (5), 487-496
Abstract: Host plant resistance is a practical and cost-effective approach for growers to manage insect pests. Recently, three new sources of resistance in black raspberry (Rubus occidentalis; selections ORUS 3778-1, ORUS 3817-1, and ORUS 4109-1) against the large raspberry aphid, Amphorophora agathonica, were identified. We studied stages of host plant acceptance: host plant attraction, parturition (deposition of nymphs), nymph survival, and adult feeding behavior (using the electrical penetration graph [EPG]) to identify the location of the plant resistance. Aphids were more attracted to the susceptible cultivar 'Munger' (control) than the resistant selections. Parturition occurred on the resistant selections, but fewer nymphs were deposited on resistant lines relative to the susceptible control. Nymphs survived only an average of 3.3–3.6 days on resistant selections, whereas 94 % were still alive after 11 days on 'Munger.' There were differences in feeding behavior between the susceptible control and the resistant selections, but no differences between the three resistant selections. The tissues responsible for resistance appear to be the mesophyll and phloem sieve elements. Aphids had a reduced probability of salivation into the phloem sieve elements of resistant selections, and only one aphid each on ORUS 3778-1 and ORUS 4109-1 successfully ingested from the phloem. Because feeding behavior of A. agathonica did not differ between resistant selections, independent confirmation that resistance is conferred by unique genes should be obtained before pyramiding these sources together.
(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): Robert R. Martin

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Amphorophora agathonica	Raspberry/blackberry (Rubus)	U.S.A. (NW)