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Resistance of four brassica leafy vegetables: kale, Chinese cabbage, rape and Ethiopian mustard to cabbage aphid, Brevicoryne brassicae (L.) was studied in cage experiments at the Botswana College of Agriculture, Gaborone, Botswana. A completely randomised design with cultivars as treatments and four replicates per treatment was used. One newly laid nymph was placed on each of the four potted p...

common (and generic) name is of obscure origin, but it was used by the French settlers in Florida as early as the sixteenth century. The tree is characteristically a plant of forest margins and clearings, but it also is often somewhat weedy, appearing in old fields, hedgerows, and along roadsides where it rapidly forms clumps by means of suckers and stolons. It is often thought of as being a ra...

Torenia is an annual plant of the family Scrophulariaceae that is used as an ornamental summer bedding plant. Torenia is also an experimental plant with several useful characteristics, i.e., ease of genetic transformation, ability to differentiate adventitious structures, protruding embryo sac, and capacity for in vitro flowering. Genetic transformation of torenia was first reported in 1995, an...

Hawaii has no native pines, but many species have been introduced as ornamental or potential timber trees. These species have been planted in environments that differ greatly from their natural habitat. This paper describes how the coordinated seasonal cycle of growth and flowering has been influenced by the climatic conditions these pines have encountered in Hawaii. Hawaii has no native pines,...

It is well known that occupational exposure to pollens of flowering ornamental plants may elicit rhinoconjunctivitis, asthma, and contact urticaria (1). However, it was not until the 1980s that a foliage decorative plant, weeping fig (Ficus benjamina), was recognized as an important cause of occupational immediate mucosal and skin reactions, and, to a lesser degree, of similar symptoms in atopi...

The antibacterial activity of eight products marketed for the therapy and prophylaxis of diseases of ornamental fishes was tested. The products contained erythromycin, neomycin, a nitrofuran, penicillin, sulfa compounds, streptomycin, or tetracycline. When used at the concentration recommended by the manufacturer, the products failed to inhibit the growth of bacterial species known to be potent...

Syngonium podophyllum Schott, commonly referred to as Nephthytis, in commercial chan nels ranks fourth in economic importance in the ornamental foliage industry of Florida and has a sales value of approximately $350,000 annu ally. Of the relatively few diseases which affect Syngonium, a leaf spot caused by Cephalospo rium dnnamomeum Linn has been observed to occur with not uncommon frequency an...