Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. VIII
Written by Dimitar KEHAYOV, Nedyalka PALAGACHEVA
With a view protection of rapeseed during flowering of pest and conservation of the main pollinators on crop plants namely bees are looking for alternative means of control. In this connection under field tested plant extracts: walnut (Juglans regia L.), wild walnut (Ailantthus altissima Swing.), tobacco (Nicotiana tabacum L.), against adult pollen beetle (Meligethes aeneus F.) and blosson beetle [Tropinota (Epicometis) hirta Poda]. Exploring held in 2018 in experimental rape fields in Southern Bulgaria. Experiment was conducted in 3 repetitions and 6 variations aim parameters. The following were: the type of sprayer and the plant extract at the same concentration of solutions. The results of conduct a studies show that high effectiveness against adults pollen beetle (M. aeneus) and blossom beetle (T. hirta) occurs with the use of plant extracts. It is established, influence both on the type of sprinkler, and the nature of the plant extract.
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