Galendromus occidentalis (Acari: Phytoseiidae) life table parameters on Oligonychus yothersi (Acari: Tetranychidae) colonies and its behavior to odors of mites, avocado shoots volatiles and synthetic compounds
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Título de la revista
ISSN de la revista
Título del volumen
Editor
Instituto de Investigaciones Agropecuarias
Serie Documental
N° Publicación
v. 82(1) p. 124-134
Resumen o contenido
The red mite, Oligonychus yothersi (McGregor) (Acari: Tetranychidae), is a serious pest of avocado (Persea americana
Mill.) ‘Hass’ in Chile. Micro-coleopterans predators are observed in avocado orchards during outbreaks of O. yothersi,
which are attracted by herbivore-induced plant volatiles (HIPVs). However, the damage to plants persists and new
predators are needed. Due to its effectiveness and adaptability to dry climates, the western predatory mite Galendromus
occidentalis (Nesbitt) (Acari: Phytoseiidae) has been adopted as a biological control agent on many crops. Ours objectives
were to study the biological parameters of G. occidentalis preying on O. yothersi in controlled conditions and its attraction
to volatile compounds from avocado shoots, live preys and four synthetic doses of methyl salicylate (MeSA) and ocimene
using a Y-tube olfactometer. We found a net reproductive rate (R0) 34.41 offspring female-1, intrinsic rate of increase
(rm) 0.19 females female-1 d-1, finite rate of increase (λ) 1.21 females female-1, mean generation time (T) 18.45 d, and
doubling time (DT) of 3.61 d. Immature phytoseiids took 7.32 d to reach adulthood with 90% survival. Female longevity
and fecundity were 36.27 d, and 59 eggs female-1, respectively. Phytoseiids show no attraction to O. yothersi volatiles
or volatiles of O. yothersi-infested avocado shoots. Nevertheless, females showed a preference for synthetic MeSA and
ocimene at 100 μg mL-1. Our findings indicate that O. yothersi is a potential diet to rear G. occidentalis, and MeSA and
ocimene could be used in lures to manipulate its behavior in avocado orchards.
Fecha
2022-01
Enlace permanente
https://hdl.handle.net/20.500.14001/68687
Cita Bibliográfica
Ceballos, Ricardo, Campos M., Cristóbal, Rioja, Tommy (2022-01). Galendromus occidentalis (Acari: Phytoseiidae) life table parameters on Oligonychus yothersi (Acari: Tetranychidae) colonies and its behavior to odors of mites, avocado shoots volatiles and synthetic compounds [en línea]. Chillán, Chile: Instituto de Investigaciones Agropecuarias. Chilean Journal of Agricultural Research. v. 82(1) p. 124-134. Disponible en: https://hdl.handle.net/20.500.14001/68687 (Consultado: 31 de octubre de 2024).