Name
Kremneva Oksana Yuryevna
Scholastic degree
•
Academic rank
—
Honorary rank
—
Organization, job position
All-Russian Research Institute of Biological Plant Protection
Web site url
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Articles count: 4
In recent years leaf tan spot had dominated into
pathogenic complex of wheat in southern Russia. The
causative agent of this disease is hemibiotrophic
ascomycete Pyrenophora tritici-repentis (Died.)
Drechsler; imperfect state of Drechslera triticirepentis
(Died) Shoem. It causes two different
symptoms in susceptible wheat varieties: chlorosis and
necrosis. Under epiphytotic disease progression crop
losses can achieve 65%. One of the most important
elements of phytosanitary control of wheat cenosis is
scientifically relevant chemical fungicides application.
Biological efficiency of some fungicides against
Pyrenophora tritici-repentis has been estimated.
Research was conducted on the experimental ground
of FSBSI ARRIBPP on the variety susceptible to the
pathogen – Krasnodarskaya 99. Preparations were
tested one time at leaf-tube formation (Z37) phase or
two times: at leaf-tube formation (Z37) and start of
heading (Z51) stages. Double treatment was more
effective than a single one. Fungicides “Amistar extra”
and “Prozaro” have got the high biological efficiency
– 80,7 and 83,7%, consequently, and longer protective
period (up to 40 days) in comparison to every tested
fungicides
The results of immunological assessment of winter wheat varieties included in the State register of breeding achievements of the Russian Federation and the variety of different types of resistance to yellow leaf spot pathogen are presented in this article
The development of leaf spot pathogens (yellow leaf spot and septoria spot) has been studied in Belarus and North Caucasian Region of Russia. The resistant wheat cultivars to the pathogens have been revealed
Puccinia triticina isolates from North Caucasus and Leningrad region were compared in regard to the genetic structure, phenotypic composition as well as frequency of occurrence of RAPD-phenotypes and polymorphous major fragments with the help of Rogers index. Did not demonstrate any significant differences according to their genetic structure and occurrence of major fragments of DNA-polymorphism. The difference of isolates from given regions was determined with high degree of confidence according to the phenotypes of virulence and RAPD-phenotypes