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- Author or Editor: A. D. Oliver x
- HortScience x
Abstract
The citrus whitefly, Dialeurodes citri (Ashmead), prefers Gardenia jasminoides Ellis cv. August Beauty to G. jasminoides cv. Radicans, Viburnum odoratis- simum Ker-Gawl, and Ligustrum sinense Lour. cv. Variegata for egg deposition. Mean numbers of citrus whiteflies found in subsequent life stages (after the egg) remained significantly higher on G. jasminoides cv. August Beauty. These four host plants of the citrus whitefly are major production and landscape items in the south; therefore, segregation of cultivars most heavily infested by the pest is an important consideration when planning control strategies.
Abstract
Root-knot nematode (Meloidogyne hapla) juvenile population increased and carrot (Daucus carota L.) yield progressively decreased during eight continuous carrot crops grown over 37 months. When ‘Haifa’ and common white clovers (Trifolium repens L.) were cropped for 29 months and plowed down, two succeeding carrot crops suffered severe yield and quality losses and the juvenile nematode population in the soil in-creased greatly. However, there were significantly fewer juveniles in the soil and significantly higher yield and better quality of carrots when nematode-resistant ‘Nevada Synthetic XX’ and ‘Nevada Synthetic YY alfalfas (Medicago sativa L.) and continuous cultivation preceeded the carrots.