Published by the American Entomological Society. In the brochure of I. Some features of insect adaptations to soil conditions. Trusova 1912, 1913, 1915 , N. The gradual transition from morphological species through biological species and specialized forms to physiological races makes difficult a clear-cut definition of species in rust fungi; in each particular case the mycologists find a different solution to this problem. Moscow: State Publishing House of Medicinal Literature. Omsk: Zapadno-Sibirskoe publishing house, Omsk branch.
New and little-known species of the genus Dolichopus Latreille, 1796 Diptera: Dolichopodidae from Russia. All these genera comprise species which parasitize higher taxa of Angiospermae, but these species may be considered as produced by ulterior intrageneric development. Thus, investigations of the racial composition of Puccinia graminis Pers. Land- und Forstwirt, 1996, 321: 259. Tranzschel; the genera Uredinopsis, Thekopsora, Calyptospora, Melampsoridium, Phakopsora, Cronartium, Coleosporium, and Chrysomyxa were prepared by V.
Journal of Science of the Karachi University 1: 106-111. Kursk: State pedagogical university, 70 p. Insects and mites - pests of agricultural crops. Yearbook of the United States Department of Agriculture. In the majority of Melampsoraceae with the exception of Coleosporium and also in genera of the subfamily Phragmidieae the basidiospores are perfectly globoid; in many Pucciniaceae they are ellipsoid, extruded on one side into a papilla by which they are borne upon the sterigma; this side is straight while the opposite side is convex, so that the sides of the basidiospore are unequal, almost reniform. In recent years a number of large works have been devoted to diseases of forest species widely used in the formation of field-protective forest strips. Of great interest is the reaction of the resistant plants to implantation of infection: the affected tissue of these plants immediately dies off.
There are two lists of fungi from Kharkov and Kursk provinces published by A. Phytopathology 70 8 : 734-737. When a still narrower specialization of both fungal species and specialized form is detected in the behavior of the grain rusts toward the host variety, for example wheat, then physiological races are involved, or biotypes,and are designated by serial ciphers. The haustoria vary in shape — from small spherical bodies and elongate bags to ramified tangles which almost fill the nourishing cells. Minsk: Nauka i tekhnika, p. In: Materials to knowledge of flora and fauna of Russian Empire. Rusakov whose works span the period 1922—1938 was outstanding in the study of geographical distribution, species composition of rust fungi of grain, transmission of the infection, ecology, degree of harm they cause, and of many other problems.
Weed plants of Magadan Region. One of the first Russian authors, P. Characterization of Maize Iranian Mosaic Virus and comparison with hawaiian and other isolates of maize mosaic virus Rhabdoviridae. Гидротермическая обработка семян перед высевом снижает поражение растений болезнью. These types were designated by Maire l91l Pyro-Uredinales. With increased activity of these enzymes, in particular of tyrosinase, the plant's susceptibility to rust increases. Reactive okhugen intermediates in plant-microbe interactions: Who is who in powdery mildew resistance.
Information for Virginia fruit growers. Необходимо содержать в чистоте прилегающие к посевам арбуза территории. About numbers and harmfulness of wireworms under some non-rotationable cultures and at their cultivation under crop rotation. Lavrov 1951a, 1951b , L. Agricultural plant protection under intensive technologies.
Bollettino della Societa Entomologica Italiana. It is possible that with these larger warts are associated the conspicuous, rather large shiny globules found on the spore wall, which are later shed, leaving depressions on the spore wall. Congress on the Protection of Tropical Crops. Between the years 1890 and the beginning of 1900, an animated discussion was engaged as to which spore -form represents the primary, and as to how the regular alternation of spore stages and heteroecism arose. Effects of insecticides used for leafhopper control on the quantity and quality of potato tubers. Epidemiology and control of Graminella nigrifrons-borne maize chlorotic dwarf and aphid-borne maize dwarf mosaic virus diseases of corn in Georgia. Hemiptera: Cicadellidae: Cicadellinae and associated egg parasitism on citrus: spatial distribution.
Journal of Economic Entomology 69 2 : 254-256. Plant protection of field crops from pests. A light trap survey of the abundance and sex ratio of leafhoppers and planthoppers in Egypt. Of the heteroecious Melampsoraceae, apart from several species of Melampsora, the aecial hosts are represented by conifers — Abietineae. Dogu Karadeniz Bölgesinde yeni Bir Zararli Ricania simulans Walker, 1851 Hemiptera: Ricaniidae 'a Karsi Azadirachtin ve Spinosad Etki Maddeli Biyopestisitlerin Etkinliklerinin Belirlenmesi. Anthropogenic transformation in the species composition of plant communities of Bolshezemelskaya tundra.
Fauna, population, and regularities of distribution of terrestrial animals in Gomel Region. Com monwealth Institute of En tomology, London. Role of antioxidant systems and juvenility in tolerance of plants to diseases and abiotic stresses. The Forest Industrial Complex: Problems and Solutions, Proc. Assessment of qualitative and quantitative damage to potato in Pakistan. Works concerning Siberia and the Far East are those of V.
Ökologische Untersuchungen über Wanzen und Zikaden auf Kulturfeldern in Schleswig-Holstein. Whereas the maximum peroxidase activity and gradual increasing of number of cationic peroxidase isozyme bands were found in November when trees prepared for winter chilling. The mechanism by which the haploid mycelium is converted into a diploid one is not yet accurately known. Virus and Viruslike Diseases of Maize in the United States. These two works, particularly the latter, form the basis of phytopathologic education in Russia. The adaptation of a physiol- ogical race to a kind of host or to diversity of the host plant is not absolute but always relative.