Strategies of decreasing harmfulness of fusariosis agents in agrophytocenoses

Abstract

60 In recent years the problems of excessive eld infections due to fusariosis agents have risen to a dangerously high level. Every 2–4 years, up to 5–15 % of winter cereal elds perish due to root rot infections, primarily, fusarioses. Practically each year a considerable share of Ukrainian grain is ranked lower since the elds are infected with fusariosis and cereals are damaged by mycotoxins. Agrophytocenoses with Fusarium inoculum are contaminated at a global level. Rather low levels of controlling the disease using current agrotechnical and chemical protection means urge geneticists and breeders to create varieties and hybrids of cultivated plants, resistant to Fusarium species. However, the results of industrial experiments in all soil-climatic regions of Ukraine have demonstrated that novel genetic and biotechnological achievements and introduction of varieties/hybrids of cereals, resistant to fusariosis, cannot ensure a proper level of controlling the disease and a possibility of obtaining high quality grain. Thus, it is important to pay attention to all the constituents of the technologies of cultivating plants while elaborating the means of effective control over fusarioses in cereals, which has also been noted by prominent phytopathologists in their works – from classic (Bilay) to modern ones (Gagkaeva, Retman, McMullen) [1–12]. Some means of controlling fusarioses are not ef cient enough and thus cannot ensure a proper level of controlling the disease. Therefore, it is possible to achieve high and quality yields of cereals via complex application of different strategies of disease control: breeding resistant species/hybrids, agrotechnical means, rst and foremost, returning the plant production of the country to biologically substantiated crop rotations and applying highly ef cient fungicides, ensuring a better way of maintaining crop productiv© V. V. SCHWARTAU, O. L. ZOZULIA, L. M. MYKHALSKA, O. Yu. SANIN, 2018 ISSN: 2312-3370, Agricultural Science and Practice, 2018, Vol. 5, No. 3