Functional response of the predatory mite Chileseius camposi (Acarina: Phytoseiidae) on densities of it prey, Panonychus ulmi (Acarina: Tetranychidae).
The functional response of the phytoseiid predator Chileseius camposi González y Schuster, 1962 (Acarina:Phytoseiidae) on densities of its prey Panonychus ulmi (Koch, 1836) was evaluated under controlled temperature (20 +/- 2 degrees C), relative humidity (75 +/- 15%) and photoperiod (16:8h L:D). A functional type II response was displayed (Holling's disk). Holling, Wolf transformation and Rogers models gave similar values for estimating parameters of the Holling's disk equation; however, estimates produced by the Livdahl and Stiven model were higher. Values of attack rate and handling time can be considered within the normal range for phytoseiid generalists.
Instituto de Producción y Sanidad Vegetal, Universidad Austral de Chile, Casilla 567, Valdivia, Chile.
Francisco
F
Sepúlveda
Roberto
R
Carrillo
D000818:Animals; D005260:Female; D008297:Male; D008925:Mites / Q000502:physiology*; D008954:Models, Biological; D011156:Population Density; D011235:Predatory Behavior / Q000502:physiology*; D040102:Tetranychidae / Q000502:physiology