Avocado 'Hass' leaf age affects life table parameters of Oligonychus yothersi (McGregor) (Acari: Tetranychidae) under laboratory conditions

Tommy Rioja; Víctor Tello; Miguel Zarzar; Antonieta Cardemil; Ricardo Ceballos

Keywords: life history, fecundity, tetranychidae, Avocado red mite, post-embryonic

Abstract

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 degrees 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 (R-0) 52.756 +/- 1.749 individuals female(-1); intrinsic rate of increase (r(m)) 0.241 +/- 0.002 female female(-1) d(-1), and finite rate of increase (lambda) 1.273 +/- 0.002 female female(-1) of O. yothersi were significantly higher on mature avocado leaves than on young leaves (R-0 = 2.727 +/- 0.271, r(m) = 0.049 +/- 0.004, and lambda = 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.

Más información

Título según WOS: Avocado 'Hass' leaf age affects life table parameters of Oligonychus yothersi (McGregor) (Acari: Tetranychidae) under laboratory conditions
Título según SCOPUS: Avocado ‘hass’ leaf age affects life table parameters of oligonychus yothersi (Mcgregor) (acari: Tetranychidae) under laboratory conditions
Título según SCIELO: Avocado 'Hass' leaf age affects life table parameters of Oligonychus yothersi (McGregor) (Acari: Tetranychidae) under laboratory conditions
Título de la Revista: CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
Volumen: 79
Número: 4
Editorial: Instituto de Investigaciones Agropecuarias, INIA
Fecha de publicación: 2019
Página de inicio: 557
Página final: 564
Idioma: English
DOI:

10.4067/S0718-58392019000400557

Notas: ISI, SCIELO, SCOPUS