title: Biological parameters and fertility life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae) on strawberry.
abstract: This study provides the first contribution of the biology and life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae), an important strawberry pest throughout the world. This species lives in the crown and leaf petioles of the plant. It is difficulty to rear this species in laboratory due to protocooperation with ants observed only in the field. We studied the life cycle of A. forbesi on the leaves of the Albion strawberry cultivar at 25 ± 2 °C, 60 ± 10% relative humidity, and a 12-h photophase. The experiment was randomised with 100 replicates. The parameters of the fertility life table were calculated using TabVida. In the population studied, 25% and 46% had four and three instars, respectively. A mean of 1.43 nymphs per female per day was generated. The mean reproductive period was seven days and the mean longevity was 10 days. In every 11 days there is a generation of A. forbesi, where each female has the potential to generate between 6 to 9 individuals daily, increasing its population by 1.2 times. The average life cycle was 16.8 days. High viability observed in all instars and the resulting values of R0, rm and λ suggest that A. forbesi has the capacity to increase their numbers in a short period of time, while generating high populations in strawberry crops, requiring differential management.
authors.affiliation: Programa de Pós-graduação em Agronomia, Produção Vegetal, Departamento de Fitotecnia e Fitossanitarismo, Universidade Federal do Paraná - UFPR, Rua dos Funcionários, 1540, CEP 80035-050, Curitiba, PR, Brazil.
authors.forename: E S
authors.initials: ES
authors.lastname: Araujo
authors.affiliation: Laboratório de Entomologia Prof. Ângelo Moreira da Costa Lima, Departamento de Patologia Básica, Universidade Federal do Paraná - UFPR, Jardim das Américas, CEP 81531-980, Curitiba, PR, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Benatto
authors.affiliation: Departamento de Fitotecnia e Fitossanitarismo, Universidade Federal do Paraná - UFPR, Rua dos Funcionários, 1540, CEP 80035-050, Curitiba, PR, Brazil.
authors.forename: Á F
authors.initials: ÁF
authors.lastname: Mógor
authors.affiliation: Entomologia, Embrapa Florestas, CP 319, CEP 83411-000, Colombo, PR, Brazil.
authors.forename: S C
authors.initials: SC
authors.lastname: Penteado
authors.affiliation: Laboratório de Entomologia Prof. Ângelo Moreira da Costa Lima, Departamento de Patologia Básica, Universidade Federal do Paraná - UFPR, Jardim das Américas, CEP 81531-980, Curitiba, PR, Brazil.
authors.forename: M A C
authors.initials: MA
authors.lastname: Zawadneak
mesh_terms: D000818:Animals; D001042:Aphids / Q000254:growth & development*; D005260:Female; D005298:Fertility; D031985:Fragaria; D015993:Life Tables; D008136:Longevity; D009758:Nymph / Q000254:growth & development; D012098:Reproduction