Cytogenetics of Aquatic Ornamentals

Ornamentals Northwest Archives

Many cultivars of ornamental conifers are difficult to propagate. Cuttings may root poorly and graft success may be highly variable even in the hands of skilled, experienced propagators. Because of these problems, we conducted a detailed study of the physiology of graft formation in Picea pungens 'Hoopsi' scions grafted on Picea abies rootstocks with the purpose of identifying factors limiting ...

Ornamentals Northwest Archives

Plant symptoms caused by Pseudomonas syringae ...................................................1 Severity of Pseudomonas syringae ............................................................... ...2 Predisposing factors increase severity ........................................3 (Wounding, Plant Dormancy, Soil factors, Dual infections) ............... 3 Classification of Pseudomonas syringae ...

Handling of Quality Fresh Produce and Ornamentals

Control of Insects and Mites on Ornamentals

DRESENT INTEREST in grow' ing ornamental plants has created a demand for information on the control of the insects, mites and other pests attacking them. Requests for this information come from home gardeners, florists, nurseries and contract applicators. Until recently very little attention was given the problem since there was no satisfactory way of estimating monetary losses of ornamentals d...

Essentially Derived Varieties in Ornamentals

The concept of Essentially derived varieties (EDVs) was introduced in the UPOV 1991 act to protect the interests of the breeder of the initial variety. When a variety is considered as an EDV, authorisation for commercial exploitation is needed from the breeder of the initial variety. There is considerable debate going on about which approaches to use for determining essential derivation and als...