Sinecological fundamentals of manifestation of tolerance of new genotypes of tribus Triticeae on influence of Eurygaster integriceps Put.

Abstract

The purpose. To study tolerance of new genotypes of Tribus Triticeae on influence of Eurygaster integriceps Put. in conditions of forest-steppe and polisya-forest-steppe ecotopes. Methods. Field, laboratory, methods of mathematical statistics. Field: elaboration of experiment, formation of record plots, determination of biological yield of grain; laboratory: assessment of quantitative and quality parameters of grain, its damage by pests. Results. Population performances of Eurygaster integriceps Put are studied depending on genotype of cereal crop and ecological conditions. It is fixed that phytocenoses of triticale and rye are the unfavourable environmental niche for Eurygaster integriceps Put. in comparison with soft wheat. In this connection they are differentiated into improbable eco-niches (Borotba, Slavetne, AD 256, Chayan, DAU 5, Chornoostyste); probable eco-niches (Vivate Nosivske, Pshenychne, Avgusro, Yaguar); very probable eco-niches (Ellada). Conclusions. In conditions of foreststeppe and polissia-forest-steppe ecotopes sowings of soft winter wheat medium-serotinal and middle-ripening cultivars are less ecologically tolerant to imago of bug. It is fixed that genotypes of winter triticale are unfavourable environmental niche for pests-phytophags in comparison with wheat and rye. In this connection they are differentiated into improbable econiches (Slavetne, AD 256, Chayan, DAU 5, Chornoostyste); probable eco-niches (Vivate Nosivske, Pshenychne, Avgusto, Yaguar); very probable eco-niches (Ellada).