20.500.12556/DKUM-83039 Obvladovanje hmeljevega bolhača (Psylliodes attenuatus Koch) na hmelju (Humulus lupulus L.) diplomsko delo Control of Hop Flea Beetle (Psylliodes attenuatus Koch) on Hops (Humulus lupulus L.) Hmeljev bolhač (Psylliodes attenuatus Koch) je pomemben škodljivec hmelja (Humulus lupulus L.), ki se prehranjuje tudi z navadno konopljo (Cannabis sativa L.) in veliko koprivo (Urtica dioica L.). Ima eno generacijo letno z dvema pojavoma in sicer spomladi v času intenzivne rasti hmelja in poleti v času oblikovanja storžkov. Ko hmeljev bolhač preseže prag gospodarske škode, uporabimo insekticide. Na hmelju ima trenutno registracijo aktivna snov (a. s.) lambda-cihalotrin in ciantraniliprol. A. s. lambda-cihalotrin bo v Evropski Uniji kmalu prepovedana, zato smo v raziskavi preučevali možnost obvladovanja hmeljevega bolhača v spomladanskem času z alternativnimi metodami z nizkim tveganjem, kot so biostimulanti, regulatorji rasti, gnojila, repelenti. Nekateri pripravki uporabljeni v raziskavi naj bi imeli stimulativen učinek na rast in razvoj hmelja, ki pa niso dali želenih učinkov v smislu hitre rasti in posledično zmanjšani pojavnosti poškodb od hmeljevega bolhača. Število hmeljevih bolhačev na rastlini ni merodajno glede ugotavljanja učinkovitosti pripravkov, saj so bolhači zelo mobilni. Najmanj bolhačev smo zasledili na parcelah, kjer smo uporabili insekticid Karate Zeon 5 CS (a. s. lambda-cihalotrin) in Exirel (a. s. ciantraniliprol), med alternativnimi pripravki pa na parcelah, kjer smo večkrat uporabili pripravek Algo-Plasmin. Poškodbe na listih hmelja so bile statistično značilno manjše, kjer smo uporabili kontaktna insekticida Karate Zeon 5 CS in Exirel. Med alternativnimi pripravki so bile manjše poškodbe na listih hmelja, kjer smo uporabili Algo-Plasmin, CutiSan in Invelope. Z raziskavo smo ugotovili, da lahko z nekaterimi alternativnimi pripravki delno omejimo poškodbe od hmeljevega bolhača na hmelju v spomladanskem času, kar pa ni primerljivo z uporabo kontaktnih insekticidov. The hop flea beetle (Psylliodes attenuatus Koch) is the most common pest on hops (Humulus lupulus L.), which also feeds on hemp (Cannabis sativa L.) and stinging nettle (Urtica dioica L.). It has one generation per year with two occurrences, one in springtime when the hop plants growth intensely, and the other in the summertime when the plants formulate cones. When the hop flea beetle exceeds the economic threshold it is recommended to use insecticides. Active ingredient (a. i.) lambda-cyhalothrin and cyantraniliprole are currently registered pesticides for hops. Because a. i. lambda-cyhalothrin will soon be prohibited in the European Union, the thesis focuses on the possibility of managing the hop flea beetle with low-risk methods such as biostimulants, growth regulators, fertilizers and repellents in spring. Some of the products, used in the research are stimulators for the growth and development of hops, but they have no effects on reducing the damage caused by the hop flea beetle. Counting the number of hop flea beetles is not a good method for determining the effectiveness of preparations, simply because flea beetles are very mobile. The lowest numbers of hop flea beetles were found on the plots where the insecticides Karate Zeon 5 CS (a. s. lambda-cyhalothrin), Exirel (a. s. cyantraniliprole), and alternative preparation Algo-Plasmin (several times used) were used. The damage on hop leaves from the hop flea beetles was statistically significantly lower where the contact insecticides Karate Zeon 5 CS and Exirel were used. Among the alternative preparations, there were minor damages on the hop leaves from the hop flea beetle where we used Algo-Plasmin, CutiSan and Envelope. This research indicates that some alternative preparations can partially limit the damage caused by hop flea beetles in springtime, but that is not comparable to the use of contact insecticides. hmelj Humulus lupulus hmeljev bolhač Psylliodes attenuatus alternativni pripravki učinkovitost hops Humulus lupulus hop flea beetle Psylliodes attenuatus alternative products efficacy true true false [M. Cizej] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-14 10:15:52 2022-09-28 09:47:15 2022-09-29 03:11:24 0000-00-00 00:00:00 2022 0 Maribor 0 Maribor XII, 47 f., [1] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 633.791:632.937(043.2)=163.6 123213059 VS_Cizej_Mitja_2022.pdf VS_Cizej_Mitja_2022.pdf 1 5DAFA3646A18387CD82215BCA85DE647 0f2d71dfea483b8d258b8b2b33ae6b4d9678ecad9879f729cfbb2a20c12213f8 df01a1f8-3988-11ed-aeb9-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=163116 Fakulteta za kmetijstvo in biosistemske vede 0 0 0