Fungicidal control of the most common onion mycoses during the growing season

Goal. To investigate the effectiveness of fungicidal control most common onion diseases during growing season.
 Methods. Informational and analytical (collection materials analysis literary sources), field research (setting up experiments, carrying out treatments records plant damage by diseases, monitoring development plants, harvesting), phytopathological (determination identification pathogens), mathematical statistical (processing results studies). Experiments were conducted on different varieties hybrids using modern fungicides with active substances.
 Results. During years research, crops dominated mycoses, namely, peronosporosis, alternaria, stemphylliosis, fusarium wilt. Downy mildew leaf spots observed all hybrids. The investigated effectively controlled downy onions. Their efficiency season averaged 55.1—100%, depending drug, degree disease variety. highest against onions was provided Fandango 200 ES, KE (fluoxystrobin, 100 g/l + proteoconazole, g/l) at rate 1.25 l/ ha Signum VG (boskalid, 267 g/ kg pyraclostrobin, 67 kg) — 1.5 kg/ ha. Fungicides 45.8—89.1% effective (alternaria stemphyllosis), 57.9—70.5% Treatments fungicides, due to reduction contributed increase in yield 1.3—6.9 t/ha, variety preparation. Among studied varieties, obtained Medusa (40.7 t/ha), among fungicide (1.25 l/ha).
 Conclusions. main mycoses (peronosporosis, alternariosis, stemphyllosis wilt) season. 45.8—100%, type disease, drug crop protective effect researched increased an average 5—25% diseases. technical identified a consumption l/ha.