Functional response of Neoseiulus californicus preying on Tetranychus urticae is affected by prey quality and host-plant acclimation

2021 ◽  
pp. 104811
Author(s):  
Bruna L. Merlin ◽  
Lucia P. Ferreira ◽  
Wesley A.C. Godoy ◽  
Gilberto J. Moraes ◽  
Fernando L. Cônsoli
Keyword(s):  
Host Plant ◽  
Functional Response ◽  
Tetranychus Urticae ◽  
Neoseiulus Californicus ◽  
Prey Quality ◽  
Plant Acclimation

Use of Functional Response Modeling to Evaluate the Effect of Temperature on Predation of Amblyseius swirskii (Acari: Phytoseiidae) Adults Preying on Tetranychus urticae (Acari: Tetranychidae) Nymphs

2021 ◽  
Author(s):  
Azadeh Farazmand ◽  
Masood Amir-Maafi
Keyword(s):  
Functional Response ◽  
Tetranychus Urticae ◽  
Attack Rate ◽  
Handling Time ◽  
Effect Of Temperature ◽  
Coefficient Of Determination ◽  
Temperature Threshold ◽  
Amblyseius Swirskii ◽  
Functional Responses ◽  
Wide Range

Abstract In this research, functional responses of Amblyseius swirskii Athias-Henriot preying on different Tetranychus urticae Koch nymphal densities (2, 4, 8, 16, 32, 64, and 128) were studied at eight constant temperatures (15, 20, 25, 27.5, 30, 32.5, 35 and 37.5°C) in a circular Petri dish (3-cm diameter × 1-cm height) under lab conditions. At all temperatures, the logistic regression showed a type II functional response. A nonlinear relationship was found between temperature and attack rate and the reciprocal of handling time. The reciprocal of handling time decreased exponentially with increasing temperature. In contrast, the attack rate grew rapidly with increasing temperatures up to an optimum, showing a decreasing trend at higher temperatures. In order to quantify the functional response of A. swirskii over a broad range of temperatures and to gain a better estimation of attack rate and handling time, a temperature-settled functional response equation was suited to our data. Our model showed that the number of prey consumed increased with rising prey density. Also, the predation rates increased with increasing temperatures but decreased at extremely high temperatures. Based on our model, the predation rate begins at the lower temperature threshold (11.73°C) and reaches its peak at upper temperature threshold (29.43°C). The coefficient of determination (R2) of the random predator model was 0.99 for all temperatures. The capability of A. swirskii to search and consume T. urticae over a wide range of temperatures makes it a good agent for natural control of T. urticae in greenhouses.

Management of Tetranychus urticae (Acari: Tetranychidae) in strawberry fields with Neoseiulus californicus (Acari: Phytoseiidae) and acaricides

2007 ◽  
Vol 42 (2) ◽  
pp. 107-120 ◽  
Author(s):  
Mário Eidi Sato ◽  
Marcos Zatti Da Silva ◽  
Miguel Francisco De Souza Filho ◽  
André Luís Matioli ◽  
Adalton Raga
Keyword(s):  
Tetranychus Urticae ◽  
Neoseiulus Californicus
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