Management of Orchid Pests with Silwet® L-77 and Horticultural Oils (PP287)

Figure 1. Some of the orchids used in the phytotoxicity study: A) Dendrobium, B) Phalaenopsis, C) Paphiopedilum, and D) Cattleya. No evidence of phytotoxicity was observed on the foliage, roots, flowers, or buds of any of the plants.IFAS researchers evaluated the ability of the surfactant Silwet® L-77 to improve the efficacy of horticultural oils in controlling boisduval scale and mite infestations in orchids. This 3-page fact sheet reports the results and provides homeowners with directions for its use. Written by R. A. Cating, M. A. Hoy, and A. J. Palmateer, and published by the UF Department of Plant Pathology, November 2011.

PP265 Physiological Disorders in Orchids: Mesophyll Cell Collapse

PP265, a 3-page illustrated fact sheet by R. A. Cating, and A.J. Palmateer, describes this physiological disorder that affects many genera of orchids and can be caused by exposure to low water temperatures or low air temperatures. Includes references. Published by the UF Department of Plant Pathology, May 2009.

PP260 Black Rot of Orchids Caused by Phytophthora palmivora and Phytophthora cactorum

PP260, a 5-page illustrated fact sheet by R.A. Cating, A. J. Palmateer, C. M. Stiles, P. A. Rayside, and D. A. Davison, describes this disease of orchids, its host range, symptoms, diagnosis, management, and nursery santiation recommendations. Includes references. Published by the UF Department of Plant Pathology, January 2009.