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Neosieulus (Cydnodromus) collegae (De Leon) (Acari:Phytoseiidae) is a heretofore relatively unknown species of predatory mite. In an olfactometer, female predators were attracted to kairomones produced by Tetranychus urticae Koch, Oligonychus ilicis (McGregor), O. ununguis (Jacobi), Eotetranychus hicoriae (McGregor), and E. sexmaculatus (Riley). Predators were repelled by odors emanating from lima bean leaves treated with Mavrik (fluvalinate) and Ammo (cypermethrin), but unresponsive to those treated with Tame (fenpropathrin) and Talstar (bifenthrin). This predator species was tolerant of residues of Vendex (hexakis), Omite (propargite), Pentac (dienochlor) and Avid (abamectin) but not to residues of Tame (fenpropathrin) and Kelthane (dicofol). Eggs of T. urticae treated with Tame (fenpropathrin) were toxic to the predator when consumed. Female N. collegae would not consume eggs treated with Avid (abamectin); starvation reduced fecundity. Prey eggs treated with Vendex (hexakis) and Omite CR (propargite) were consumed without affecting predator fecundity or mortality. Eggs treated with Pentac (dienochlor) or Kethane (dicofol) were consumed, but significantly reduced predator fecundity. Predators released into plots in a commercial nursery during winter in north Florida reduced field populations of T. urticae within 20–30 days, if released in high numbers. Neosieulus collegae may have significant potential as a biological control agent in nursery crops for control of mite pests.

Kairomone Response, Pesticide Tolerance and Field Efficacy of the Predatory Mite, Neosieulus collegae (De Leon)