Septoria blotch epidemic process on spring wheat varieties.

The Septoria blotch of spring wheat leaves and ears is one of the most economically significant infections in the Siberian region. In the control systems of Septoria blotch the main ecologically safe element is resistant varieties, which are designed to slow down the pathogens reproduction rate and slow down or stop the development of the epiphytotic process. The purpose of the work was to clarify the species composition of Septoria blotch pathogens for West Siberian regions and spring wheat varieties, to study the epiphytotic process of Septoria differentially on the leaves and ears of varieties, and to evaluate the activity of seed transmission of Parastagonospora nodorum.

[Effect of metal cations on the formation of antibiotic and pigment by the mycophilic fungus Hypomyces rosellus 94/77].

Using the method of mathematical planning of experiment the effect of calcium, magnesium, manganese, iron, zinc and copper on synthesis of antibiotic and pigment by mycophilic fungus Hypomyces rosellus has been studied. The ions of Mg2+, Mn2+, Fe2+ have been found to be important for antibiotic and pigment formation by fungus, the ions of Mg2+ and Mn2+ are interchangeable.

[Selection of the seeding media and the age and quantity of mycelia providing simultaneous biosynthesis of an antibiotic and pigment by the fungus Hypomyces rosellus].

The authors observed maximum simultaneous biosynthesis of antibiotic and pigment in the microphilic fungus with using 48-hour seed mycelium having the specific growth rate of 0.008-0.011 h-1 in an amount of 5-7 per cent (v).

[Development of a synthetic medium for the growth of the mycophilous fungus Hypomyces rosellus 94/77 and its synthesis of an antibiotic and a pigment].

Using the method of mathematical design of an experiment the synthetic medium ensuring the growth of the mycophilous fungus Hypomyces rosellus 94/77 and its production of antibiotic and pigment has been worked out.

[Optimizing the composition of the medium for the biosynthesis of antibiotic, proteases and pigments by the mycophilic fungus Hypomyces rosellus using a mathematical experimental design method].

Regulation of protease and pigment production in Hypomyces rosellus by the medium components was easier than that of antibiotic production. Medium was developed. The activity of exoproteases and pigment with the use of this medium increased up to 385-800 PU/ml and 0.