Antibiosis and Antixenosis to Pea Aphid (Homoptera: Aphididae) in Cultivars of Field Peas

Autor:	P. A. Mackay, J. J. Soroka
Rok vydání:	1991
Předmět:	Aphid Ecology biology Homoptera Antibiosis Aphididae General Medicine biology.organism_classification medicine.disease_cause Acyrthosiphon pisum Sativum Agronomy Insect Science Infestation medicine Cultivar
Zdroj:	Journal of Economic Entomology. 84:1951-1956
ISSN:	1938-291X 0022-0493
DOI:	10.1093/jee/84.6.1951
Popis:	Life tables and host preference tests were used to assess the resistance of six cultivars of field peas, Pisum sativum L., to pea aphid, Acyrthosiphon pisum (Harris), in the laboratory. Antibiosisresistance in ‘Tipu’ and ‘Century’ was expressed as decreased aphid fecundity and longevity. Although differences in the reproductive rate were considerable, because prereproductive periods were similar among cultivars, there were only slight differences in the aphids’ intrinsic rate of increase (r m) among cultivars. At 10 d after infestation, ‘Tipu’ exhibited the most and ‘Triumph’ the least antixenotic resistance. At 20 d, ‘Triumph’ was still the preferred cultivar. ‘Trapper’, on which aphids had the greatest r m value, appeared to have some tolerance to aphid feeding.
Databáze:	OpenAIRE
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