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- 2003 . ʲ 2015 - KHARKIV : Editorial Board: . . ( ), V. V. Kyrychenko (editor-in-chief), ...

-- [ 3 ] --

F. moniliforme F. sambucinum (23,634,2 %). (13,714,4 %). , . . , .

2. Fusarium (2010-2012 .

) , % Fusarium 2010 2011 2012 F. oxysporum 53,5 48,4 63,7 55,2 F. culmorum 45,0 54,3 53,8 51,0 F. moniliforme 34,2 28,1 25,3 29,2 F. solani 51,8 43,5 53,4 49,6

F. gibbosum 42,7 51,6 47,2

F. sambucinum 23,6 32,0 27,8

F. avenaceum 47,5 52,7 50,1

F. graminearum 49,8 53,0 51,4 F. sporotrichiella 42,5 46,0 49,3 45,9 . , ˳ . Fusarium. , , F. oxysporum, F. culmorum, F. solani F. sporotrichiella. .

1. . . / . . , . . , . . , . . , 2005. 40 .

2. . . / . . // , . : , 2001. . 242246.

3. . . / . . , . . , . . . : , 2013. 200 .

4. . . . .: , 1977. 443 .

5. . . / . . , . . , . . . .: , 2000 176 .

6. . . : . : , 2003. 186 .

7. . . , ϳ ˳ // . . .

. . . , 2002. 21 .

8. . . ( ) / . . . - .: , 1985. - 351 .

9. . . / . . , . . , . .. .: , 1988. 552 .

10. . . / . . , . . , . . // . 1982. . 16, 3. . 260263.

References

1. Petrenkova VP, Chernyayeva IM, Markova TYu, Sokol TV. Diseases and pests of soybean.

Kharkiv. 2005. 40.

2. Borzenkova GA. Species composition and pathogen Fusarium root rot in central Russia Questions physiology, breeding and cultivation technology of agricultural plants. Orel. Orelizdat. 2001. 242-246.

3. Petrenkova VP, Sokol TV, Luchna IS. Theoretical Foundations of legumes breeding for resistance to pests. Kharkiv. Collegium, 2013. 200.

4. Bilay V. Fusari. Kiev. Naukova Dumka. 1977. 443.

5. Peresypkin VF, Markov IL, Shelestova VS. Practical basics of scientific research in plant protection. Kyiv. Publishing House of NAU, 2000. 176.

6. Chekalin NM. The genetic basis of breeding legumes for resistance to pathogens.

Monografya. Poltava. ntergrafka. 2003. 186.

7. Shendryk KM. The etiology and pathogenesis of root rot of soybean, biological justification for measures restricting their development in northern steppes of Ukraine. Thesis.....

candidate. biol. science. Kyiv. 2002. 21.

8. Dospekhov B. Methods of field experiments. oscow: gropromizdat, 1985. 351.

9. Bilay VI, Gvozdyak RI, Skripal IG. Microorganisms - pathogens of plants. Kiev. Naukova Dumka, 1988. 552.

10. Lesovoy MP, Parfenyuk AI, Kondratyuk OK. Intraspecific differentiation agents of gray and white rot sunflower pathogenicity. Mycology and Phytopathology. 1982. 16 (3): 260-263.

   

.

. 2010 2012 . . . . .

. . . , (, , , ). .

. . , . . , . . .

. , Fusarium.

. , , , Fusarium spp. , , , Fusarium.

: F. oxysporum (26,7 %), F. solani (14,5 %), F. moniliforme (14,4 %). F. sambucinum (13,7 %), F. gibbosum (9,3 %), F. sporotrichiella (7,2 %). F. graminearum (6,2 %), F. culmorum (5,7 %) F. avenaceum (2,4 %).

. F. xysporum, F. culmorum, F. solani, F. sporotrichiella F. gibbosum, F. avenaceum, F. graminearum (45,9 55,2%). F. moniliforme F. sambucinum (23,634,2 %), (13,714,4 %).

. Fusarium. , , : F. oxysporum, F. culmorum, F. solani F. sporotrichiella, .

   

The study aim was to determine species composition of Fusarium pathogens of soybean in the Eastern Forest-Steppe of Ukraine and to establish their pathogenicity levels.

Study Materials and Methods. The investigations were carried out during 2010-2012.

Stationary experiments were laid out on crops of the Laboratory of Plant Production and Variety Studies of the Plant Production Institute named after VYa Yuryev of NAAS in accordance with the field experiment methods. Mycological assay of species composition of soybean root rot pathogens was performed in the Laboratory of Plant Immunity to Diseases and Pests by VI Bilai methods. The study material was soybean varieties of different ripeness groups grown by different agrotechnologies (predecessor, nutrition system, sowing time and soil treatment). Plant root system was visually inspected, and then pathogens were isolated in pure cultures and microscopically analyzed. Pathogenicity was determined in the laboratory by MP Lesovoy, OK Kondratyuk and AI Parfenyuk method.

Study Results. The phytopathological study found that root rot and soybean wilt in the Eastern Forest-Steppe of Ukraine were caused by fungi of the genus Fusarium.

The vast majority of the analyzed soybean plants were affected by one of Fusarium species. However, from some affected plants two, and sometimes three pathogenic species, were isolated? indicating co-development of Fusarium spp species. As a result of identification of a root rot pathogen population isolated from affected tissues at different stages of development of soybean plants, this population was revealed to be represented by nine species of fungi of the genus Fusarium.

The species F. oxysporum (26.7%), F. solani (14.5%), F. moniliforme (14.4%) were the most frequent. F. sambucinum (13.7%), F. gibbosum (9.3%), and F. sporotrichiella (7.2%) ranked the next place in terms of prevalence. F. graminearum (6.2%), F. culmorum (5.7%), and F. avenaceum (2.4%) were less common.

The main criterion of harmful effects of a pathogen is its pathogenicity. Regardless of the frequencies of occurrence of F. oxysporum, F. culmorum, F. solani, F. sporotrichiella, F. gibbosum, F. avenaceum, and F. graminearum, they had middle pathogenicity (45.9-55.2%). F. moniliforme and F. sambucinum were low pathogenic (23.6-34.2%) in all the study years, but their portion in the population was quite large (13.7-14.4%).

Conclusions. In the Eastern Forest-Steppe of Ukraine the population of Fusarium pathogens of soybean consists of nine species of fungi of the genus Fusarium. The four species - F.

oxysporum, F. culmorum, F. solani, and F. sporotrichiella, which were characterized by middle pathogenicity, were the most common, competitive, adapted to the environmental conditions and harmful.

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