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The typical shrubby growth of Bulbine frutescens (yellow-flowered form). This variable species grows as a small shrub, with short, low stems that produce roots down towards the ground, and slender, erect, succulent, grey-green leaves. The flowers appear throughout the summer, on a 30 cm erect inflorescence. The flowers can be orange, yellow or ...
The complete picture of long-term ecological effects from invasive pests is difficult to measure; and it is too early to determine the effects of the many new invasive pest introductions. Much of the research has focused of the biology of the pests—i.e. life cycle and host preferences—towards understanding how to contain their spread. [10]
Bulbine is a genus of plants in the family Asphodelaceae and subfamily Asphodeloideae, [3] named for the bulb-shaped tuber of many species. [4] It was formerly placed in the Liliaceae . [ 5 ] It is found chiefly in Southern Africa , with a few species extending into tropical Africa and a few others in Australia and Yemen .
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... Bulbine francescae; Bulbine frutescens; G. Bulbine glauca; L.
Common Names of Diseases, The American Phytopathological Society Brunt A.A. (2005), Virus and Virus-like Diseases of Bulb and Flower Crops , John Wiley & Sons, New York 10158-0012, USA. Pp. 105–110.
For the sugarcane crop to be infected by the disease, large spore concentrations are needed. The fungus includes a structure known as a 'smut-whip', a curved black structure which emerges from the leaf whorl, which helps to spread the disease to the other plants, usually over a period of about three months.
Forest entomology also includes the management of insect pests that cause the degrading, defoliation, crown die-back or death of trees. Thus the scope is wide and includes: Documentation of all insect species and related arthropods in natural and man-made forests, and the study and ecology of those species.
In a pest risk analysis initiated by a specific pathway, often an imported commodity or goods associated with an imported commodity, e.g. packing materials, the probability of pest entry is evaluated for that specific pathway. For a pest risk analysis initiated for a specific pest, all probable pathways are evaluated for that individual pest.