title: Susceptibility of Five Sugar Beet Cultivars to the Black Bean Aphid, Aphis fabae Scopoli (Hemiptera: Aphididae).
abstract: The black bean aphid, Aphis fabae Scopoli (Hemiptera: Aphididae), is one of the important pests of sugar beet. The relative impact of resistance, including antibiosis and antixenosis of five sugar beet cultivars (Doroti, Perimer, Pershia, Rozier and 006) on A. fabae was studied under laboratory conditions using clip cages. The antibiosis test was based on life table parameters. Significant differences on developmental time, mean number of nymphs/aphid/day, fecundity, and adult longevity of A. fabae were found across tested sugar beet cultivars. In addition, there were significant differences among the sugar beet cultivars for population growth parameters such as the intrinsic rate of natural increase (r m ), net reproductive rate (R 0), finite rate of increase (λ), doubling time (DT), and mean generation time (T) of A. fabae. The highest and lowest (r m ) values were observed on Pershia (0.449 nymphs/female/day) and Perimer (0.358 nymphs/female/day), respectively. No significant differences were found for the preference of the black bean aphid, and antixenosis had no effect on resistance against this aphid. As a result, our findings showed that the Pershia cultivar was a relatively susceptible host plant. Two cultivars (Perimer and Rozier) were relatively resistant to A. fabae, which could prove useful in the development of IPM programs for this aphid in sugar beet fields.
authors.affiliation: Dept of Plant Protection, Fac of Agricultural Science, Univ of Mohaghegh Ardabili, Ardabil, Iran. golizadeh@uma.ac.ir.
authors.forename: A
authors.initials: A
authors.lastname: Golizadeh
authors.affiliation: Dept of Plant Protection, Fac of Agricultural Science, Univ of Mohaghegh Ardabili, Ardabil, Iran.
authors.forename: Z
authors.initials: Z
authors.lastname: Abedi
authors.affiliation: Dept of Plant Protection, Fac of Agricultural Science, Univ of Mohaghegh Ardabili, Ardabil, Iran.
authors.forename: E
authors.initials: E
authors.lastname: Borzoui
authors.affiliation: Dept of Plant Protection, Fac of Agricultural Science, Univ of Mohaghegh Ardabili, Ardabil, Iran.
authors.forename: N
authors.initials: N
authors.lastname: Golikhajeh
authors.affiliation: Dept of Plant Protection, Fac of Agricultural Science, Univ of Mohaghegh Ardabili, Ardabil, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Jafary
mesh_terms: D000818:Animals; D000898:Antibiosis; D001042:Aphids; D027461:Beta vulgaris; D005260:Female; D009758:Nymph; D010571:Pest Control; D012098:Reproduction
keywords: Aphid performance; host suitability; life table parameters; plant resistance