Data/hora: 18/06/2024 03:33:47

Provedor de dados: | 109
País: | Colombia
Título: | Functional response of Cydnodromus picanus (Acari: Phytoseiidae) on two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae)
Autores: | Tello-Mercado,Víctor Ernesto; Zarzar-Maza,Miguel Esteban; Suarez-Pantoja,Angélica María.
Data: | 2017-06-01
Ano: | 2017
Palavras-chave: | Biological control; Predation; Holling's disc equation; Attack rate; Handling time.
Resumo: | Abstract: The functional response of adult females of predatory mite Cydnodromus picanus Ragusa (Acari: Phytoseiidae) was evaluated at different egg densities (5, 10, 20, 30, 40, 50, 60, 70, 80, 100 and 150 eggs per predator) of Tetranychus urticae Koch (Acari: Tetranychidae), which had 16, 42 and 65 h since oviposition. The experimental design was in a completely randomized blocks with five replicates per treatment. The environmental conditions of the trials were 25±2°C temperature, 50±2% of relative humidity and a photoperiod of 16:8 hours (light: dark). The average consumption rates for the three kinds of prey showed no significant differences (p&gt;0.05) being 20.56±1.02, 18.59±0.79 and 18.38±0.94 prey/predator for eggs of 16, 42 and 65 h age, respectively. Using a logistic regression, a type II functional response on C. picanus females for the three kinds of eggs was determined. The values of response parameters for C. picanus females were as follows: Attack rate (a): 0.055±0.006, 0.076±0.009 and 0.073±0.016; Handling time (Th ): 0.684±0.036, 0.894±0.034 and 0.898±0.062; for eggs of 16, 42 and 65 h age, respectively. These values are within the range of variation for different species of phytoseiids. These results suggest that C. picanus could effectively regulate populations of T. urticae in the field.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200275
Editor: | Universidad Nacional de Colombia
Relação: | 10.15446/acag.v66n2.55054
Formato: | text/html
Fonte: | Acta Agronómica  v.66 n.2 2017
Fonte: | info:eu-repo/semantics/openAccess