Assessing the population of cereal aphids in spring triticale cultivar collection
The article presents data on the estimation of the number of aphids on the territory of the field station of Russian State Agrarian University - Moscow Timiryazev Agricultural Academy for 2016-2017 on varietal samples of the spring triticale collection of the Department of Genetics, Breeding and Seed Production. The assessment was carried out on two physiological phases ofplants - tillering and milk ripeness. At the tillering stage, bird cherry-oat aphid prevailed, and at the stage of milk ripeness, large grass aphid prevailed. Common grass aphids and barley aphids were also found. Based on the data obtained, the authors found the difference in the population of cultivars, which may indicate resistance to a particular type of aphid. In 2016, the following varieties were identified at the tillering stage: C236, C224, V10286, P2-16-5, 09305, P2-16-19, C248, C254, and 09020, 08880, 09306, Khlebodar Ukrainsky, Grego, Dublet, 131/7, V17-5-49, which were less populated. At the stage of milk ripeness, the following varieties are S1728, C236, C248, 131/7, Dublet. In 2017, the following samples with the most significant number of aphids can be used for further selections: C254, Ril130R-22-2, and a large margin C250 (the tillering stage). In 2016, these genotypes were in the group of medium - and low populated. The highest population of aphids was observed in four genotypes: Merezhko Memory, C247, C257, V10-286 (grain filling stage). The identified sparsely populated varieties are of interest for further research in terms of variety resistance, and the most populated ones are used as sensitivity standards.