منابع مشابه
Air War Against Pests
T. HE AIRPLANE holds a bright new hope in the farmers' uphill struggle with insects. Since 1922, when Department engineers and entomologists developed a practical method for dusting cottonfields with calcium arscnatc to protect the crop against the boll weevil, commercial airplane dusting has become routine, particularly in cultivated fields that spread over a wide area unbroken by trees or shr...
متن کاملInsect pests of tea and their management.
Globally, 1031 species of arthropods are associated with the intensively managed tea Camellia sinensis (L.) O. Kuntze monoculture. All parts of the plant, leaf, stem, root, flower, and seed, are fed upon by at least one pest species, resulting in an 11%-55% loss in yield if left unchecked. There has been heavy use of organosynthetic pesticides since the 1950s to defend the plant against these p...
متن کاملInsect and Disease Pests of Southern Hardwoods
In natural stands, trunk borers are economically the most serious insect pests. The larvae construct galleries in the trunks of living trees, causing the greatest damage in the lower portion (Beal 1952; Hay and Wootten 1955). The quality of the butt log, which is potentially the most valuable portion of the tree, is greatly reduced. Oaks suffer more damage than other hardwoods in the South (Hay...
متن کاملInsect defence: its impact on microbial control of insect pests
Insects are the earliest and most diverse taxon of animals accounting for more species than all other animals put together because of their high reproductive potential and varied niche. Though cellular reactions like phagocytosis, nodulation and encapsulation and humoral reaction through secretion of antibacterial proteins are known for fungus and bacterial invaders, little is known about insec...
متن کاملAlternatives to Chemical Control of Insect Pests
In 2011, practitioners and advocates of Integrated Pest Management (IPM) find themselves addressing agricultural, societal, and political pressures worldwide resulting from human population growth. This growth brings simultaneous burdens of sustaining a steady food supply; these include preventing losses from pests, dealing with increased human global travel, which in turn intensifies opportuni...
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ژورنال
عنوان ژورنال: Nature
سال: 1915
ISSN: 0028-0836,1476-4687
DOI: 10.1038/095265a0