SciELO - Scientific Electronic Library Online

 
vol.79 número4Repeatability and genotypic stability of agronomic characteristics in Panicum maximum Jacq.Transcriptome assembly and expression analysis in Colletotrichum gloeosporioides -tolerant Rubus glaucus Benth. índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Chilean journal of agricultural research

versão On-line ISSN 0718-5839

Resumo

RIOJA, Tommy et al. Avocado ‘Hass’ leaf age affects life table parameters of Oligonychus yothersi (McGregor) (Acari: Tetranychidae) under laboratory conditions. Chil. j. agric. res. [online]. 2019, vol.79, n.4, pp.557-564. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392019000400557.

The avocado red mite Oligonychus yothersi (McGregor) is the most important avocado (Persea americana Mill.) foliar pest in Chile, infesting ‘Hass’ avocado between mid-summer and late autumn. The post-embryonic development, survival, longevity and life table parameters of O. yothersi were evaluated on both young and mature ‘Hass’ avocado leaves at 25 ± 0.7 °C, 60 ± 5% relative humidity and 16:8 h photoperiod. The time for larvae, protonymphs and deutonymphs to develop was longer on young leaves than on mature leaves. The immature stage of O. yothersi was shorter (9.29 ± 0.22 d) on mature leaves than on young leaves (14.43 ± 0.28 d); O. yothersi also exhibited higher survival rates for larvae, protonymphs, and deutonymphs on mature leaves. The net reproductive rate (R0) 52.756 ± 1.749 individuals female-1; intrinsic rate of increase (rm) 0.241 ± 0.002 female female-1 d-1, and finite rate of increase (λ) 1.273 ± 0.002 female female-1 of O. yothersi were significantly higher on mature avocado leaves than on young leaves (R0 = 2.727 ± 0.271, rm = 0.049 ± 0.004, and λ = 1.051 ± 0.004). The time required to double the O. yothersi population was only 2.872 ± 0.002 d on mature leaves. Therefore, life table parameters of O. yothersi are negatively affected by young avocado leaves, suggesting that constitutive defenses present in young leaves could affect O. yothersi population parameters.

Palavras-chave : Avocado red mite; fecundity; life history; post-embryonic; Tetranychidae.

        · texto em Inglês     · Inglês ( pdf )