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By James R. Dixon, Visit Amazon's John E. Werler Page, search results, Learn about Author Central, John E. Werler, , Regina Levoy

От легендарной алмазоспинной гремучей змеи до маленькой безопасной равнинной слепозмейки, Техас обладает наибольшим разнообразием видов змей по сравнению с другими штатами США. Этот полностью иллюстрированный определитель змей, написанный наиболее уважаемыми в Техасе герпетологами, дает читателю наиболее современную и полную информацию для идентификации и понимания a hundred and ten видов и подвидов. Книга снабжена one hundred ten цветными фотографиями, показывающими каждую змею, 39 детальными рисунками и one hundred ten картами распространения.
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SPEISER, E. WYSS AND V. 3. Implications for various biological control agents From the point of view of organic farming, three categories of biological control agents must be considered separately: predators and parasites, natural microorganisms and genetically modified microorganisms. 1. Predators and parasites This category includes mainly predatory and parasitic insects which attack crop pests, but also predatory mites, other arthropods and nematodes for the control of insects or molluscs. All standards mention the use of predators and parasites in crop production.

P. G. 1995. Some problems associated with the analysis of the costs and benefits of pesticides. Crop Protection 14, 593-600. B. S. 1998. East African species introductions and wetland management: sociopolitical dimensions. Symposium proceedings, American Association for the Advancement of Science (AAAS) Africa Program, Science in Africa: Emerging Water Management Issues. Philadelphia, PA, February 1998, 1-30. org/international/africa/ewmi/> 30 March 2005 Burden, D. 2003. Citrus profile. htm> 31 March 2005.

M. (eds), Biological Control: Benefits and Risks. Cambridge Univ. , 277-282. USDA 1991. Situation and outlook report: Fruit and tree nuts: Value of citrus and noncitrus products. USDA, Economic Research Service. USDA 2002. Oranges: the most consumed fruit in America. Fruit and Tree Nuts Outlook/FTS-296/Jan. 31, 2002: 1214. van Lenteren, J. , Roskam, M. M. and Timmer, R. 1997. Commercial mass production and pricing of organisms for biological control of pests in Europe. Biological Control 10, 143-149.

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