Učinkovitost nižih doza insekticida i ojačivača bilja u suzbijanju krumpirove zlatice

master's thesis

• Title (english): Efficacy of lower doses of insecticides and plant biostimulants in controlling the Colorado potato beetle
• Author: Kristina Šumić
• Mentor: Maja Čačija (mentor)
• Committee member: Maja Čačija (predsjednik povjerenstva)
• Committee member: Aleksandar Mešić (član povjerenstva)
• Committee member: Ivan Juran (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Agricultural Zoology); Zagreb
• Defense date and country: 2022-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Krumpirova zlatica (Leptinotarsa decemlineata (Say, 1824)) najvažniji je štetnik krumpira proširen u svim područjima uzgoja krumpira. Karakterizira je sposobnost razvoja rezistentnosti na djelatne tvari insekticida. Kroz rad je testirana učinkovitost nižih doza insekticida (Alverde i Mospilan 20 SG) u kombinaciji sa tri različita ojačivača bilja (AlgoVital Plus, AminoVital, Folifertil T). Tijekom mjesec dana, krumpir posađen u posudama tretirao se svakih sedam dana ojačivačima bilja, a u zadnjem tretiranju na određenim varijantama primijenjeni su i insekticidi u preporučenoj i pola preporučene doze. U laboratorijskom pokusu ispitana je učinkovitost navedenih tretmana na ličinke krumpirove zlatice. U petrijeve zdjelice postavljano je po pet jedinki te su dodani tretirani listovi krumpira. Ukupno je postavljeno 14 varijanti u pet ponavljanja, uključujući i netretiranu kontrolu. Očitavanja mortaliteta ličinki zlatice provedena su 24, 48 i 72 sata od zadnjeg tretiranja. U pokusu najvišu učinkovitost postigao je Folifertil T (69 %), dok je učinkovitost ostala dva ojačivača bila između 49 % (AminoVital) i 56 % (AlgoVital Plus). Insekticidi u punoj dozi pokazali su najvišu učinkovitost na kraju pokusa (Alverde 100 %, Mospilan 91 %), kao i Alverde u pola preporučene doze (96 %). Od kombinacija ojačivača s insekticidom Alverde, najboljima su se pokazale kombinacije koje su uključivale Folifertil T (96 %) i AminoVital (92 %), dok su kombinacije ojačivača s insekticidom Mospilan postigle nešto nižu učinkovitost. Primjenom kombinacija ojačivača s insekticidima moguće je korištenje znatno nižih doza insekticida od preporučenih, čime se smanjuje negativan utjecaj na okoliš, prirodne neprijatelje, ali se i odgađa razvoj otpornosti zlatice na insekticide te povećava set mjera za borbu protiv ovog štetnika.

Abstract (english)

The Colorado potato beetle (Leptinotarsa decemlineata (Say, 1824)) is the most important pest of potatoes, widespread in all areas of potato cultivation. It is characterized by the ability to develop resistance to the active substances of insecticides. This work tested the efficacy of lower doses of insecticides (Alverde and Mospilan 20 SG) in combination with three different herbal biostimulants (AlgoVital Plus, Amino Vital, Folifertil T). During the course of a month, potatoes planted in containers were treated every seven days with biostimulants, and in the last treatment, insecticides were applied in the recommended and half-recommended doses to certain variants. In a laboratory experiment, the efficacy of the treatments was tested on the Colorado potato beetle larvae. Five individuals were placed in petri dishes and treated potato leaves were added. A total of 14 variants were set up in five replicates, including an untreated control. Readings of the mortality of larvae were carried out 24, 48 and 72 hours after the last treatment. In the experiment, the highest efficacy was achieved by Folifertil T (69%), while the efficacy of the other two biostimulants was between 49% (AminoVital) and 56% (AlgoVital Plus). Insecticides in the full dose showed the highest efficacy at the end of the experiment (Alverde 100%, Mospilan 91%), as well as Alverde in half the recommended dose (96%). Of the combinations of biostimulants with Alverde, the combinations that included Folifertil T (96 %) and AminoVital (92 %) proved to be the best, while combinations with Mospilan achieved somewhat lower efficacy. By applying combinations of biostimulants with insecticides, it is possible to use significantly lower doses of insecticides than recommended, which reduces the negative impact on the environment and natural enemies, but also delays the development of resistance to insecticides and increases the set of measures to combat this pest.

• Keywords: insekticidi; Leptinotarsa decemlineata; biostimulatori; rezistentnost; učinkovitost
• Keywords (english): efficacy; insecticide; Leptinotarsa decemlineata; biostimulants; resistance
• Language: croatian
• URN:NBN: urn:nbn:hr:204:346839
• Study programme: Title: Phytomedicine; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka fitomedicine (magistar/ magistra inženjer/inženjerka fitomedicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-10-19 11:51:40