title: Host plant effects on the behaviour and performance of Amblyseius swirskii (Acari: Phytoseiidae).
abstract: Biological control in ornamental crops is challenging due to the wide diversity of crops and cultivars. In this study, we tested the hypothesis that trichome density on different host plants influences the behavior and performance of the predatory mite Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae). Behavioural observations of this predator in the presence or absence of prey (western flower thrips, Frankliniella occidentalis Pergande) (Thysanoptera: Thripidae) were done on leaf squares of ornamental plant species differing in trichome density (rose, chrysanthemum and gerbera) and compared to a smooth surface (plastic). Tomato leaves were used to observe the influence of glandular trichomes. The performance of A. swirskii was assessed by measuring predation and oviposition rate. Behaviour of A. swirskii was influenced by plant species. Up to a certain density of trichomes, trichome number had a negative effect on walking speed. It was highest on plastic, followed by rose. No differences were found among chrysanthemum, gerbera and tomato. Walking speed was slightly higher on disks without prey. Proportion of time spent walking was the same on leaf disks of all plant species, with and without prey. No effect of glandular trichomes on tomato leaves was seen. Most thrips were killed and consumed on gerbera, and least on rose. Predation rates on chrysanthemum and plastic were intermediate. In contrast, no differences in oviposition rate were found among plant species. The results of this study indicate that trichome density can explain some of the variability in efficacy of A. swirskii on different crops. Release rates of A. swirskii may need to be adjusted depending on the crop in which it is used.
authors.affiliation: Vineland Research and Innovation Centre, 4890 Victoria Ave N., Box 4000, Vineland Station, ON, L0R 2E0, Canada, Rose.Buitenhuis@vinelandresearch.com.
authors.forename: Rosemarije
authors.initials: R
authors.lastname: Buitenhuis
authors.forename: Les
authors.initials: L
authors.lastname: Shipp
authors.forename: Cynthia
authors.initials: C
authors.lastname: Scott-Dupree
authors.forename: Angela
authors.initials: A
authors.lastname: Brommit
authors.forename: Wonhyo
authors.initials: W
authors.lastname: Lee
mesh_terms: D000818:Animals; D005260:Female; D008925:Mites; D010058:Oviposition; D010572:Pest Control, Biological; D011235:Predatory Behavior; D061149:Thysanoptera; D064201:Trichomes
references.citation: Exp Appl Acarol. 2001;25(10-11):819-31
references.pmid: 12455873
references.citation: J Insect Sci. 2010;10:149
references.pmid: 21070175
references.citation: Oecologia. 2003 Mar;135(1):84-90
references.pmid: 12647107
references.citation: Trends Ecol Evol. 1991 Jun;6(6):179-82
references.pmid: 21232451
references.citation: Oecologia. 2000 Nov;125(3):428-435
references.pmid: 28547338
references.citation: Exp Appl Acarol. 2008 Aug;45(3-4):111-22
references.pmid: 18683057
references.citation: Exp Appl Acarol. 2001;25(4):271-91
references.pmid: 11603735
references.citation: J Econ Entomol. 2010 Jun;103(3):563-9
references.pmid: 20568599
references.citation: Exp Appl Acarol. 2010 Sep;52(1):29-34
references.pmid: 20191312
references.citation: Bull Entomol Res. 2003 Aug;93(4):343-50
references.pmid: 12908920
references.citation: Behav Res Methods Instrum Comput. 2000 Aug;32(3):446-9
references.pmid: 11029818
references.citation: Bull Entomol Res. 2001 Feb;91(1):61-7
references.pmid: 11228589
references.citation: Exp Appl Acarol. 2013 Mar;59(3):275-82
references.pmid: 22923143