Abstract
This study consisted in revealing the possibility of using two ecologically safe methods to control gooseberry aphid (Aphis grossulariae Kalt.) in black currant cultivars: selection aphid resistant cultivars and the use of plant water extracts of wormwood (Artemisia absinthium L.) and tansy (Tanacetum vulgare L.) in the arid zone of Central Kazakhstan for protection against aphid. The study of the resistance of 15 black currant cultivars to gooseberry aphids in the field on the natural background of the population development (2015-2017) has shown that the cultivars differ significantly in their level of resistance. Mila, Sophia and Zhuravushka, which were not inhabited with aphids for three seasons, proved to be highly resistant to A. glossulariae, Garmoniia and Bariton-resistant, Kanakhama, Natasha and Altaiskaia pozdniaia-medium resistant, Rita, Agata and Gerkules-low-resistant and Zabava, Prestizh, Iadrenia and Pamiati Kukharskogo-non-resistant. The efficiency of the combined action of water extracts of A. absinthium and T. vulgare was high and 2 weeks after the treatment by botanical preparations it was from 87.2 to 100%.
Highlights
Central Kazakhstan has the sharply continental climate with hot, dry summers and cold winters with little snow
In Lisavenko Research Institute of Horticulture for Siberia (Barnaul) black currant cultivars combining the genotypes of three subspecies Ribes nigrum L. and R. dikuscha Fisch
To identify black currant cultivars which are resistant to A. grossulariae, the dynamics of development of the aphid population were studied in the field in the experimental section of black currant of Zhezkazgan Botanical Garden for 3 years (2015-2017)
Summary
Central Kazakhstan has the sharply continental climate with hot, dry summers and cold winters with little snow. The scope of this study was to reveal the possibility of using two ecologically safe methods to control gooseberry aphid (Aphis grossulariae Kalt.) in black currant cultivars: Selection of aphid resistant cultivars and the use of plant water extracts of wormwood (Artemisia absinthium L.) and tansy (Tanacetum vulgare L.) in the arid zone of Central Kazakhstan for protection against aphid. To determine the biological efficiency, as in the resistance assessment, the average number of live aphids per bush was counted on 10 plants of each cultivar.
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