Effect of the biopreparations Bion 50 WG and Bio-algeen S 90 Plus 2 on health and yield of spring barley cultivated in pure crop and in mixture with oat
Joanna Horoszkiewicz-Janka
sekretariat@iorpib.poznan.plInstytut Ochrony Roślin w Poznaniu (Poland)
Tadeusz Michalski
Akademia Rolnicza w Poznaniu (Poland)
Abstract
Effect of the Bion 50 WG and Bio-algeen S 90 Plus 2 preparations on health and yielding of spring barley (cv. Atol), cultivated as a pure crop or as a mixture with oats, was analyzed in a field experiment carried out in Swadzim (near Poznań) in the years 2000 and 2001. Occurrence of the most important diseases was studied: leaf spot (Drechslera teres (Died) Drechs.), powdery mildew (Erysiphe graminis DC), rynchosporiosis (Rhynchosporium secalis (Oud.) Davis) and rust of barley (Puccinia hordei Otth.). The used bio-stimulators improved plant healthiness, the infection symptoms were reduced by 25–78%, depending on the disease and preparation used. The effect was prolonged till the second scoring at the milk stage, four weeks after the Bion application and eight weeks after the Bio-algeen treatment. At this stage, barley treated with the Bio-algeen became more susceptible to the powdery mildew. The cultivation of barley in mixtures with oat caused a remarkable reduction of the infection levels for the Rhynchosporium in 2000 and for the Erysiphe in 2001.The mixtures with oats yielded on the same level as the pure barley crop. Only the mixture with the naked oat (cv. Akt), which constituted 66.6% of the stand, had lower yield. The both biopreparations did not affect yield, either in pure stands or in mixtures.
Keywords:
biopreparation, cereals mixtures, health, oat, spring barley, yieldReferences
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Authors
Joanna Horoszkiewicz-Jankasekretariat@iorpib.poznan.pl
Instytut Ochrony Roślin w Poznaniu Poland
Authors
Tadeusz MichalskiAkademia Rolnicza w Poznaniu Poland
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