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Neciljno delovanje izvlečkov invazivnih tujerodnih rastlinskih vrst na opraševalce in naravne sovražnike na navadni ajdi (Fagopyrum esculentum Moench) in faceliji (Phacelia tanacetifolia Benth.) v poljskih razmerah
Polanšek, Julija (Author), Trdan, Stanislav (Mentor) More about this mentor... This link opens in a new window

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Abstract
Leta 2018 smo na Laboratorijskem polju Biotehniške fakultete preučevali neciljno delovanje izvlečkov sedmih izbranih invazivnih tujerodnih rastlinskih vrst na opraševalce in naravne sovražnike. Poskus smo zasnovali na večih terminih na posevkih navadne ajde (Fagopyrum esculentum) in facelije (Phacelia tanacetifolia). Površina poskusnih njiv je merila 780 m2, razdelili pa smo jo v 4 bloke. Znotraj blokov smo naključno razporedili 10 obravnavanj: 1) listi češkega dresnika (Fallopia x bohemica), 2) listi japonskega dresnika (Fallopia japonica), 3) listi kanadske zlate rozge (Solidago canadensis), 4) listi orjaške zlate rozge (Solidago gigantea), 5) listi velikega pajesena (Ailanthus altissima), 6) listi navadne amorfe (Amorpha fructicosa), 7) listi octovec (Rhus typhina), 8) cvetovi kanadske zlate rozge (Solidago canadensis), 9) pozitivna kontrola (insekticid Karate Zeon 5 CS) in 10) negativna kontrola (neškropljeno). V obdobjih cvetenja navadne ajde in facelije smo škropiva, pripravljena iz izvlečkov invazivnih tujerodnih rastlin z ročno škropilnico nanašali na posevke. S štetjem čebel, čmrljev, polonic, tenčičaric in plenilskih stenic pred in po škropljenju smo preverjali dve hipotezi. Na obeh poljščinah se je po škropljenju z izvlečki izbranih invazivnih tujerodnih rastlinskih vrst pojavilo manj opraševalcev in naravnih sovražnikov kot na neškropljenih poljščinah (negativna kontrola). Prav tako pa smo potrdili hipotezo, da se bo na obeh poljščinah, poškropljenih s kemičnim insekticidom (pozitivna kontrola), pojavilo manj opraševalcev in naravnih sovražnikov kot v primeru, ko sta bili navadna ajda in facelija poškropljeni z izvlečki invazivnih tujerodnih rastlinskih vrst.

Language:Slovenian
Keywords:biotično varstvo rastlin, opraševalci, koristni organizmi, invazivne tujerodne rastlinske vrste, navadna ajda, Fagopyrum esculentum, facelija, Phacelia tanacetifolia, poljski poskus
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:BF - Biotechnical Faculty
Year:2019
Publisher:[J. Polanšek]
UDC:632.937(043.2)
COBISS.SI-ID:9316985 Link is opened in a new window
Views:342
Downloads:160
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Secondary language

Language:English
Title:Non-target effects of invasive alien plant species extracts on pollinators and natural enemies on common buckwheat (Fagopyrum esculentum Moench) and lacy phacelia (Phacelia tanacetifolia Benth.) under
Abstract:
In 2018, at the Laboratory Field of the Biotechnical Faculty, we studied the non-targeted effect of extracts of seven selected invasive alien plant species on pollinators and natural enemies. The experiment was based on the crop of buckwheat (Fagopyrum esculentum MOENCH) and phacelia (Phacelia tanacetifolia BENTH.). It measured 780 square meters and was divided into 4 blocks. Within the blocks, we dealt randomly with 10 treatments: 1) Bohemian knotweed (Fallopia x bohemica), 2) Reynoutria japonica (Fallopia japonica), 3) leaves of Canada Goldenrod (Solidago canadensis), 4) Giant Goldenrod (Solidago gigantea), 5) Tree of heaven (Ailanthus altissima), 6) Indigo bush (Amorpha fructicosa), 7) Staghorn cumac (Rhus typhina), 8) Canada Goldenrod flowers (Solidago canadensis), 9) positive control (Karate Zeon 5 CS insecticide) and 10) negative control (non-sprayed). During the flowering of buckwheat and phacelia, we applied sprays prepared from extracts of invasive alien plant species with a manual sprayer to the crop. By counting the bees, bumblebees, Coccinellidae, lacewings and predators from the family Pentatomidae before and after spraying, we tested two hypotheses. In both crops, fewer pollinators and natural enemies would appear after spraying with the extracts of selected invasive alien plant species than in non-sprayed crops (negative control). We also confirmed the hypothesis that fewer pollinators and beneficial organisms would appear on both crops sprayed with the chemical insecticide (positive control) than when buckwheat and phacelia were sprayed with extracts of invasive alien plant species.

Keywords:biological control, pollinators, natural enemies, invasive alien plant species, Buckwheat, Fagopyrum esculentum, Phacelia, Phacelia tanacetifolia, field experiment

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