منابع مشابه
On Coastal Ecological Characterization Studies
technical assistance services are based on an analysis o f t h e issues a determination o f the decisionmakers involved and t h e i r i n f o r m a t i o n needs, and an evaluation o f the s t a t e o f the a r t t o i d e n t i f y information gaps and t o determine p r i o r i t i e s. This i s a strategy t h a t w i l l ensure t h a t the products produced and disseminated are t i m e l y an...
متن کاملOn ecological studies: a short communication.
The typical objective of research is to try and identify cause-and-effect relationships. As with any research design, there are strengths and weaknesses involved in trying to achieve this objective. Some study designs are stronger than others in attempting to establish cause-and-effect associations. The task of establishing cause-and-effect relationships is challenging (Hill, 1965) and any stud...
متن کاملEliminating of Pathogenic Soil Borne Pythium Species Spreading Across the Marine Port of Duba
Pythium species are considered the most important soil born fungi. They are facultative heterotrophic microorganisms. Under proper conditions, it become highly virulent to plants (depending on the species), causing many diseases, especially in the first stages of growth. These fungi abound in heavy agricultural soil and Egypt is an important source for such fungi that can be transmitted to anot...
متن کاملHost Specificity of Pathogenic Pythium Species: Implications for Tree Species Diversity
In the Janzen—Connell hypothesis, host-specific natural enemies enhance species diversity and influence the structure of plant communities. This study tests the explicit assumption of host specificity for soil pathogens of the genus Pythium that cause damping-off disease of germinating seeds and seedlings. We isolated Pythium spp. from soil of a tropical forest in Panama. Then, in an inoculatio...
متن کاملComparative studies on the DNA of Pythium species and some possibly related taxa.
DNA from 14 Pythium species, Verrucalvus flavofaciens and Zoophagus insidians was characterized by CsCl-bisbenzimide density gradients in order to investigate its taxonomic potential. A few incomplete analyses were made for other species. All clearly assignable Pythium species produced three DNA bands in the gradient. Pythium undulatum along with Verrucalvus and Zoophagus produced only two band...
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ژورنال
عنوان ژورنال: Japanese Journal of Phytopathology
سال: 1994
ISSN: 1882-0484,0031-9473
DOI: 10.3186/jjphytopath.60.269