Development and Spread of Diseases in Spring Camelina (Camelina sativa (L.) Grantz) when using Various Treatments

Abstract

Spring camelina is a promising oilseed crop for the dry steppe zone of Northern Kazakhstan. However, the expansion of its sowing areas is constrained by the lack of scientific research, especially on the phytosanitary state. The article presents the results of the study of fungi of the Alternaria and Fusarium genus isolated from the affected organs of spring camelina plants and provides measures to control them in the field conditions of the region. The research aimed to identify common diseases and determine their development and distribution under different backgrounds when treated with fungicides. To identify fungal strains, the method of determination of the direct nucleotide sequence of the intergenic transcribed region was used, followed by the determination of nucleotide identity with the sequences deposited in the Gene Bank international database, as well as the construction of phylogenetic trees with nucleotide sequences. As a result of the analysis, phytopathogenic strains belonging to Alternaria alternata, Alternaria tenuissima and Fusarium acuminatum were identified. During field studies, the development and spread of diseases under different background conditions of fungicide treatment versus control were analyzed. Of the products used, the Pictor fungicide (active ingredients: Boscalid 200 g/l + dimoxystrobin 200 g/l) showed high efficiency, compared with the Extrasolbiofungicide (Bacillus subtilis, strain H-13). The results of the study can serve as a basis for the development of chemical and biological control methods aimed at specific pathogens.

Modified Method for the Evaluation of Resistance to Fusarium Blight in White Mustard (Sinapis Alba L.), Black Mustard (Brassica Nigra (L.) W.D.J. Koch) and Spring False Flax (Camelina sativa (L.) Crantz)

“…One of the harmful diseases of these crops is Fusarium blight, caused by fungi of the genus Fusarium Link. Infection at early developmental stages (2-4 true leaves and stem extension stages) results in rapid plant death [5][6][7]. Penetration of the pathogen's infective matter inside the stem at later stages of development (flowering and green pod stages) leads to occlusion of the vascular bundles, causing premature drying of the plants, reduction in their productivity (by 50-60 %) and seed germination [8][9][10].…”