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- Author or Editor: P. L. Neel x
- HortScience x
Abstract
The tumid spider mite (Tetranyehus tumidus banks) is the most common and destructive spider mite species on palms in nursery and landscape plantings. Treatments with two applications of aldicarb, dienochlor, Tricychohexyltin hydroxide (Dowco-213), propargite, oxythioquinox, and hexakis (beta, beta-dimethylphenethyl)-distannoxane, (SD-14114), left less than 1 mite per 3 leaflet sample on container-grown parlor palms (Chamaedorea elegans Mart.). This degree of control was also obtained but with phytotoxicity by chlordimeform, 0-[5-chloro-1-(methylethyl)-1H-1,2,4-triazol-3-yl] 0,0-diethyl phosphorothioate (CGA-12223), oxamyl, and S-tricyclohexyltin 0, 0-diisopropyl phosphorodithioate (R-28627). Other miticides which caused significant population reduction and no phytotoxicity were acephate and tetradifon. Treatments of chlorobenzilate, dicofol, and formetanate reduced populations significantly but resulted in plant damage.
Abstract
Grevillea chrysodendron, an ornamental tree similar to Grevillea robusta Cunn., the silk oak, is native to North Queensland, Australia, and was grown and observed for 6 years at the Agricultural Research Center (ARC), Ft. Lauderdale. During that time 28 trees flowered and shed over 300,000 seeds of which over 300 sprouted in an adjacent fallow field and attained heights of 1 to 2 meters within 2 years. Because of its potentially weedy nature, the planting and the seedlings have been destroyed. The Florida ecosystem is a fragile one which already contains too many escaped, exotic ornamentals.