Laboratorijsko preučevanje insekticidnega delovanja prahov invazivnih tujerodnih rastlinskih vrst v samostojni uporabi in kombinacijah z lesnim pepelom in diatomejsko zemljo na riževega žužka (Sitophilus oryzae, Coleoptera, Curculionidae)

Vasilić, Andrija (author), Trdan, Stanislav (mentor)

V laboratorijskih razmerah smo preučevali insekticidno delovanje prahov štirih invazivnih tujerodnih rastlinskih vrst (navadne amorfe [Amorpha fruticosa], velikega pajesena [Ailanthus altissima], kanadske zlate rozge [Solidago canadensis] in octovca [Rhus typhina]) v samostojni uporabi in v kombinacijah z lesnim pepelom in diatomejsko zemljo. Cilj naloge je bil preučiti učinkovitost navedenih prahov za zatiranje riževega žužka (Sitophilus oryzae) pri različnih temperaturah in različnih vrednostih relativne zračne vlage. Insekticidno delovanje prahov smo preučevali pri dveh različnih temperaturah (20 in 25 °C) in pri dveh vrednostih relativne zračne vlage (Rh) (55 in 75 %). Pšenico smo mešali z različnimi kombinacijami prahov v večjih erlenmajericah. Ugotovili smo nizko smrtnost pri samostojni uporabi rastlinskih prahov. Diatomejska zemlja je pokazala visoko učinkovitost pri samostojni uporabi, pri manjši koncentraciji v kombinacijah z rastlinskimi prahovi pa je njihova učinkovitost značilno padla. To pomeni, da ne obstaja dovolj sinergije med rastlinskimi prahovi in diatomejsko zemljo, medtem ko smo pri uporabi lesnega pepela ugotovili zadovoljivo učinkovitost, tako pri samostojni uporabi kot v kombinacijah z rastlinskimi prahovi.

• Language: Slovenian
• Keywords: rižev žužek, Sitophilus oryzae, skladiščne žuželke, diatomejska zemlja, lesni pepel, invanzivne tujerodne rastline, kanadska zlata rozga, navadna amorfa, veliki pajesen, octovec, alternativne metode varstva rastlin, laboratorijski poskus
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [A. Vasilić]
• Year: 2022
• PID: 20.500.12556/RUL-134792
• UDC: 632.7:632.936(043.2)
• COBISS.SI-ID: 99087875
• Publication date in RUL: 02.02.2022

VASILIĆ, Andrija, 2022, Laboratorijsko preučevanje insekticidnega delovanja prahov invazivnih tujerodnih rastlinskih vrst v samostojni uporabi in kombinacijah z lesnim pepelom in diatomejsko zemljo na riževega žužka (Sitophilus oryzae, Coleoptera, Curculionidae) [online]. Master’s thesis. Ljubljana : A. Vasilić. [Accessed 26 March 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=134792

Secondary language

• Language: English
• Title: Investigation on insecticidal efficacy of invasive alien plants powders in individual use and combination with wood ash and diatomaceous earth against rice weevil (Sitophilus oryzae, Coleoptera, Curculionidae) under laboratory conditions

Abstract

In this study, we studied the insecticidal activity of powders of four different invasive alien plant species under laboratory conditions, namely: 1) false indigo (Amorpha fructicosa), 2) tree of heaven (Ailanthus altissima), 3) Canada goldenrod (Solidago Canadensis) and 4) staghorn sumac (Rhus typhina), used alone and in combination with wood ash and diatomaceous earth. The goal of the task was to study the effectiveness of powders of four invasive alien plant species and combinations with wood ash and diatomaceous earth for the control of rice weevil (Sitophilus oryzae) at different temperatures and different air humidity values. The insecticidal action of the selected powder formulations and the effect of the prepared formulations were studied at two different temperatures (20 and 25°C) and at two values of relative air humidity (Rh) (55 and 75%). Wheat was mixed in various combinations in larger erlenmeyer flasks. We found low mortality in the independent use of plant powders. Diatomaceous earth showed high efficacy when used alone, but when we reduced the concentration in the combinations with plant powders, the efficacy dropped. This means that there is not enough synergy between plant dusts and diatomaceous earth. On the other hand, we found satisfactory efficiency in the use of wood ash, both in single use and in combinations, against rive weevil.

• Keywords: rice weevil, Sitophilus oryzae, storage pests, diatomaceous earth, wood ash, invasive alien plants, Canada goldenrod, indigo bush, tree of heaven, Staghorn sumac, alternative methods, plant protection/laboratory experiment