Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries

We propose a systematic presence-absence sampling plan for estimating densities of both Tetranychus urticae Koch (Acari: Tetranychidae) and its predator Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) on strawberries. It is based on the synchrony and spatial coincidence between prey and pre...

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Autores principales:	Greco, N.M., Tetzlaff, G.T., Liljesthröm, G.G.
Formato:	JOUR
Materias:	Neoseiulus californicus Presence-absence sampling Strawberry Tetranychus urticae fruit integrated pest management predator-prey interaction sampling Acari Acaridae Fragaria x ananassa Neoseiulus Phytoseiidae Tetranychidae Tetranychus
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09670874_v50_n1_p23_Greco
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09670874_v50_n1_p23_Greco
record_format	dspace
spelling	todo:paper_09670874_v50_n1_p23_Greco2023-10-03T15:55:04Z Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries Greco, N.M. Tetzlaff, G.T. Liljesthröm, G.G. Neoseiulus californicus Presence-absence sampling Strawberry Tetranychus urticae fruit integrated pest management predator-prey interaction sampling Acari Acaridae Fragaria x ananassa Neoseiulus Neoseiulus californicus Phytoseiidae Tetranychidae Tetranychus Tetranychus urticae We propose a systematic presence-absence sampling plan for estimating densities of both Tetranychus urticae Koch (Acari: Tetranychidae) and its predator Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) on strawberries. It is based on the synchrony and spatial coincidence between prey and predator. Active stages of both species on each leaflet and the proportion of T. urticae-free leaflets were recorded from 87 samples collected during two growing seasons on five commercial farms. Seventy to 160 leaflets in a sample were taken at intervals of 5-10 m in each row. The distribution-free equation Ln(m) = a + b Ln(-Ln(p)) was used to describe the relationships between the mean number (m) of T. urticae and N. californicus per leaflet and the proportion (p) of T. urticae-free leaflets. We devised the following density estimators: T. urticae: ̄mTu=exp(2.78 + 1.31 Ln(- Ln p)) and N. californicus: ̄mNc=exp(-0.04 + 0.76 Ln(-Ln p)). These estimates, complemented with the knowledge of the economic level of damage and the number of predators necessary to control different densities of T. urticae, are likely to help reduce the use of acaricides in the context of integrated pest management of T. urticae on strawberry. Fil:Tetzlaff, G.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09670874_v50_n1_p23_Greco
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Neoseiulus californicus Presence-absence sampling Strawberry Tetranychus urticae fruit integrated pest management predator-prey interaction sampling Acari Acaridae Fragaria x ananassa Neoseiulus Neoseiulus californicus Phytoseiidae Tetranychidae Tetranychus Tetranychus urticae
spellingShingle	Neoseiulus californicus Presence-absence sampling Strawberry Tetranychus urticae fruit integrated pest management predator-prey interaction sampling Acari Acaridae Fragaria x ananassa Neoseiulus Neoseiulus californicus Phytoseiidae Tetranychidae Tetranychus Tetranychus urticae Greco, N.M. Tetzlaff, G.T. Liljesthröm, G.G. Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
topic_facet	Neoseiulus californicus Presence-absence sampling Strawberry Tetranychus urticae fruit integrated pest management predator-prey interaction sampling Acari Acaridae Fragaria x ananassa Neoseiulus Neoseiulus californicus Phytoseiidae Tetranychidae Tetranychus Tetranychus urticae
description	We propose a systematic presence-absence sampling plan for estimating densities of both Tetranychus urticae Koch (Acari: Tetranychidae) and its predator Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) on strawberries. It is based on the synchrony and spatial coincidence between prey and predator. Active stages of both species on each leaflet and the proportion of T. urticae-free leaflets were recorded from 87 samples collected during two growing seasons on five commercial farms. Seventy to 160 leaflets in a sample were taken at intervals of 5-10 m in each row. The distribution-free equation Ln(m) = a + b Ln(-Ln(p)) was used to describe the relationships between the mean number (m) of T. urticae and N. californicus per leaflet and the proportion (p) of T. urticae-free leaflets. We devised the following density estimators: T. urticae: ̄mTu=exp(2.78 + 1.31 Ln(- Ln p)) and N. californicus: ̄mNc=exp(-0.04 + 0.76 Ln(-Ln p)). These estimates, complemented with the knowledge of the economic level of damage and the number of predators necessary to control different densities of T. urticae, are likely to help reduce the use of acaricides in the context of integrated pest management of T. urticae on strawberry.
format	JOUR
author	Greco, N.M. Tetzlaff, G.T. Liljesthröm, G.G.
author_facet	Greco, N.M. Tetzlaff, G.T. Liljesthröm, G.G.
author_sort	Greco, N.M.
title	Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
title_short	Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
title_full	Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
title_fullStr	Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
title_full_unstemmed	Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries
title_sort	presence-absence sampling for tetranychus urticae and its predator neoseiulus californicus (acari: tetranychidae; phytoseiidae) on strawberries
url	http://hdl.handle.net/20.500.12110/paper_09670874_v50_n1_p23_Greco
work_keys_str_mv	AT greconm presenceabsencesamplingfortetranychusurticaeanditspredatorneoseiuluscalifornicusacaritetranychidaephytoseiidaeonstrawberries AT tetzlaffgt presenceabsencesamplingfortetranychusurticaeanditspredatorneoseiuluscalifornicusacaritetranychidaephytoseiidaeonstrawberries AT liljesthromgg presenceabsencesamplingfortetranychusurticaeanditspredatorneoseiuluscalifornicusacaritetranychidaephytoseiidaeonstrawberries
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Presence-absence sampling for Tetranychus urticae and its predator Neoseiulus californicus (Acari: Tetranychidae; Phytoseiidae) on strawberries

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