Pratt, P.D., Croft, B.A., 1999.
Expanded distribution of the bamboo spider mite, Schizotetranychus longus (Acari: Tetranychidae), and predation by Neoseiulus fallacis (Acari: Phytoseiidae). Acarologia, 40 (2): 191-197.
Abstract
Schizotetranychus longus was newly recorded on its host plant bamboo in the Willamette Valley, Oregon (USA). The ability of adult females of Neoseiulus fallacis (Garman), a native predaceous mite, to invade S. longus nests after construction times of 5 or 10 days was investigated. The frequency of predators in nests decreased from 5 to 10 days, although N. fallacis laid most of its eggs in nests irrespective of construction time. In choice tests, spider mite webbing was more attractive to N. fallacis than eggs, but similar to faeces. Predators searched more in proximity to faeces than eggs, but resting sites were equally common near both. Survival, activity, reproduction of N. fallacis when given an excess of mixed life stages of S. longus, Tetranychus urticae Koch, pollen of Tulipa gesneriana L. or Pseudotsuga menzesii (Mirbel), or no food, were measured by holding single adult female N. fallacis for 7 days. Survival, activity, oviposition and immature production of predators were alike for both spider mites, but lower (or higher activity) with pollens or when starved. To see if N. fallacis would suppress S. longus under normal growing conditions, predators were added to infested Sasaella hidaensis (Makino and Uchida), var. Murai, and mites were monitored thereafter for 5 weeks. N. fallacis significantly reduced levels of S. longus and the rates that it infested bamboo leaves. N. fallacis had nearly eliminated S. longus from plants at 5 weeks.
