The evaluation of disease resistance of flax genotypes in relation to environmental factors

Stafecka, Inga; Grauda, Dace; Stramkale, Veneranda

doi:10.13080/z-a.2019.106.047

Zemdirbyste-Agriculture

2019

DOI: 10.13080/z-a.2019.106.047

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The evaluation of disease resistance of flax genotypes in relation to environmental factors

Inga Stafecka

Dace Grauda

Veneranda Stramkale

Abstract: Fungal diseases are one of the limiting factors of flax (Linum usitatissimum L.) production in variable environmental conditions. The expansion of fungal diseases depends on the plant resistance, pathogen population's ability to overcome this resistance and plant growth conditions. This study is aimed to estimate the flax resistance to fungal diseases in relation to environmental factors under the field conditions and identify the most promising accessions for plant breeding. A total of 24 fibre flax genotypes… Show more

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Cited by 5 publications

References 23 publications

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The stability of varieties is an important element of the integrated protection of flax from

Kudryavceva¹

2021

Agrarian Bulletin of The

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Abstract. The purpose of the research is to characterize the varieties of long-legged flax included in the State Register of Breeding Achievements in terms of resistance to fusarium wilt, rust, anthracnose and pasmo. The research was conducted in 2018–2020 in vegetative, laboratory and field conditions at the All-Russian Research Institute of Flax (currently: A separate division Research Institute of Flax). As an object of research, we used varieties of flax-long-legged flax included in the State Register of Breeding Achievements of the Russian Federation for 2018–2020. Methods. The studies were carried out using modern mycological and phytopathological methods. Laboratory, vegetation and field experiments were conducted according to the All-Russian Research Institute of Flax methods. Results and practical significance. Among the studied 66 varieties, 56.1 % were highly resistant and resistant genotypes to fusarium wilt and 58.3 % – to rust. The specific weight of the Flax Institute varieties for this period was 34.8 %. High resistance to rust and fusarium wilt was characterized by the VNIIL selection varieties: Universal, Diplomat, Alexim, Dewdrop, Zaryanka, Aleksandrit. For the first time, scientists of the Flax Institute have created varieties of flax-long – legged (Diplomat and Tonus) resistant to three diseases: rust, fusarium wilt and anthracnose, and the Caesar variety-to four diseases. All varieties, with the exception of Diplomat and Tonus, a selection of the Flax Institute, were susceptible to anthracnose. The Grant variety of the selection of the Republic of Belarus and the Caesar variety were resistant to pasmo by 59.7 %, the rest were characterized by resistance to damage by 27.8–42.0 %. Scientific novelty. The characteristics of the resistance of the varieties included in the State Register of Breeding Achievements of the Russian Federation are comprehensively described on infectious and provocative backgrounds using natural and synthetic populations of pathogens diseases of flax. Varieties with group resistance to 2, 3, and 4 diseases are identified. The use of flax varieties resistant to the most economically dangerous diseases in flax crops will reduce the infectious potential and its accumulation in nature.

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The stability of varieties is an important element of the integrated protection of flax from

Kudryavceva¹

2021

Agrarian Bulletin of The

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The effectiveness of etching flax seeds with the preparation “Sistiva”

Kudryavcev

2023

Agrarian Bulletin of The

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Abstract. The purpose is testing of a new method of etching flax seeds with a new fungicidal drug with a long-term protective effect of “Sistiva”. Methods. Tested during field experiments on registration tests of pesticides and determination of the economic efficiency of using the results of scientific research in agriculture. The relevance and national economic significance of the development are determined by its relevance to the agroindustrial complex of Russia with the possibility of increasing the efficiency of flax seed etching, replacing old preparations with new ones, contributing to the improvement of biological and economic indicators of flax cultivation technology. The scientific novelty of the research is associated with the priority of searching for acceptable technological methods, including effective plant protection measures, for the flax growing of the Russian Federation. Results. A fungicidal seed protectant “Sistiva” (0.5 l/t), new for flax growing, was identified, which confirmed in field registration tests the long-term protective effect claimed in preliminary experiments and statistically significantly exceeded the effectiveness of the standard seed protectant TMTD (4 l/t). The indicators of the influence of these chemicals on the manifestation of diseases of flax seedlings (anthracnose, ozoniosis (mottling)) and maturing flax plants (anthracnose, septoria (pasmo), aureobazidiosis (polysporosis)), on the yield of flax products are analyzed. In a production environment with the use of an automated etching machine PS-10A, an effective reliable decrease in the manifestation of flax diseases and an increase in its yield associated with the use of the “Sistiva” preparation are shown. In the production experience, he surpassed in biological efficiency and a positive effect on the yield of flax products – the basic seed protectant TMTD. The economic effect of the new recommended option in comparison with the basic one was +15,257 rubles/ha. The environmental and sanitary-hygienic advantages of the use of “Sistiva” over the previously practiced seed etching with toxic chemicals are noted.

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Fungal and bacterial infections of flax seeds

Kudryavtseva¹

2022

Agrarnaâ nauka

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Relevance. The pathogenic complex of seed infection causes large crop losses and reduced quality characteristics of flax products. The purpose of the research is to identify the species composition of pathogens that pose a threat to the crop crop by their harmfulness or are potentially dangerous.Methods. The object of research was the seeds of 21 flax varieties included in the State Register of Breeding Achievements of the Russian Federation for 2015–2021. The research was carried out at the All-Russian Flax Research Institute, as well as at the Laboratory of Breeding Technologies of the Federal Research Center for Bast Crops in 2015–2021 using modern mycological and phytopathological methods, as well as VNIIL techniques.Results. Analysis of the phytosanitary condition of the seed material of 21 flax varieties for 6 years (2015–2021) revealed a high degree of infection of seeds with parasitic and saprophytic infections, including 17 species of fungi and 3 species of bacteria. The saprophytic complex was mainly represented by species of the genera Alternaria sp., Penicillium sp., Aspergillus sp., Mucor sp., Rhizopus sp., Trichothecium roseum, Trichoderma lignorum, etc. The lowest infectious load on flax seeds was noted in the Kostroma region (0–13.0%) and in the Kuban (5.0–19.8%). The following varieties had group resistance to seed infections of fusarium, anthracnose and aureobasidiosis: Diplomat, Caesar, Alexandrite, Alexim, Tonus, Nadezhda. The minimal infectious load of pathogenic microflora from the entire set of varieties was noted on the Tverskoy variety (14.7%).

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The evaluation of disease resistance of flax genotypes in relation to environmental factors

Cited by 5 publications

References 23 publications

The stability of varieties is an important element of the integrated protection of flax from

The stability of varieties is an important element of the integrated protection of flax from

The effectiveness of etching flax seeds with the preparation “Sistiva”

Fungal and bacterial infections of flax seeds

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