Environmental Entomology (1983) 12, 916-918

V.R. Calcote (1983)
Southern pecan leaf phylloxera (Homoptera: Phylloxeridae): Clonal resistance and technique for evaluation
Environmental Entomology 12 (3), 916-918
Abstract: Forty-six pecan clones (cultivars or selections) were artificially infested with the southern pecan leaf phylloxera, Phylloxera russellae Stoetzel, to determine resistance. The trees were inoculated by attaching branches from 'Mahan' trees infested with overwintering eggs. Thirty-two clones were resistant, and 14 showed various degrees of susceptibility. Some clones formed small galls from the introduced nymphs but formed normal size galls from a native or indigenous population.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

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.
	Phylloxera russellae	Pecan/hickory (Carya)	U.S.A. (mid S)
	Phylloxera russellae	Pecan/hickory (Carya)	U.S.A. (SE)
	Phylloxera notabilis	Pecan/hickory (Carya)
	Phylloxera texana	Pecan/hickory (Carya)	U.S.A. (mid S)