In the Czech Republic, apple orchards cover an area of 7.975, of which almost 55% involve superannuated plantations. The research was carried out in the Agricultural and Trade Cooperation - Orchards Starý Lískovec, which farm on 105.5. ha. In the thesis, a detailed description of the apple blossom weevil is given, including its biology, ecological requirements, harmful effects, and ways of its monitoring and regulation. The thesis also includes a chapter that is dedicated to resistance of the parasite against commonly used insecticides. The efficiency of natural insecticides Spintor and Spruzit-Flüssig was compared to a common insecticide Calypso 480SC. As a result, Spruzit-Flüssig seemed to be the most efficient (80%), in comparison with the least efficient Calypso 480 SC (50%). During the beginning of vegetation in 2015, the observations were made in order to discover the species preference of the apple blossom weevil. Jonagold was determined as most attacked cultivar, since in different areas of the orchard, 207 blossoms of 400 were attacked. On the contrary, Idared and Gloster revealed no evidence of having been attacked. Furthermore, ingestion activity of insect after insecticide application was observed; in all cases, the ingestion activity was inhibited.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:362455 |
| Date | January 2016 |
| Creators | Vrabec, Luboš |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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