Preučevanje vpliva pripravka Rhizoflo Premium na pojavljanje škodljivih organizmov na krompirju in pridelek krompirja (Solanum tuberosum L.) ; Investigation of an effect of product Rhizoflo Premium on the occurrence of pests and diseases on potato and the yield of potato (Solanum tuberosum L.)

V letu 2017 smo izvedli poljski poskus s krompirjem, kjer smo želeli preučiti vpliv pripravka Rhizoflo Premium na pojavljanje škodljivih organizmov, in sicer koloradskega hrošča (Leptinotarsa decemlineata) ter dveh glivičnih bolezni - črne listne pegavosti krompirja (Alternaria solani) in krompirjeve plesni (Phytophthora infestans). Rhizoflo Premium je pripravek nove generacije, ki je sestavljen iz dveh bakterijskih izolatov - Pseudomonas fluorescens in Azospirillium brasilense. Oba spadata pod rizobakterije (PGPR), to so bakterije, katere se nahajajo v zemlji v neposredni bližini korenin. Rizobakterije izpolnjujejo naslednje kriterije, in sicer kompetitivno koloniziranje korenin, stimuliranje rasti rastlin ter inhibicija patogenih mikroorganizmov. Poskus je potekal na Laboratorijskem polju Biotehniške fakultete v Ljubljani na površini 1279,8 m2. V poskusu so bile vključene tri sorte, 'Morgana', 'Sunita' in 'Primabelle'. Pri vsaki sorti je bil v 1/3 vrst posajen krompir, kateri je bil predhodno namočen v pripravek Rhizoflo Premium, v 1/3 vrst poškropljen s pripravkom Rhizoflo in v 1/3 vrst ne tretiran krompir (kontrola). Ugotovili smo, da je bil učinek pripravka Rhizoflo Premium večji pridelek pri tretiranih gomoljih, saj je bil končni pridelek signifikantno večji pri namočenih (povp. 40,43 t/ha) in škropljenih gomoljih (povp. 34,65 t/ha) v primerjavi s kontrolo (povp. 32,75 t/ha). Pri popisu škodljivih organizmov smo ugotovili, da ni imel vpliva na razlike v številčnosti med obravnavanji, saj je prisotnost določenih razvojnih faz koloradskega hrošča in simptomov bolezni nihala med obravnavanji. ; In 2017 an experiment was carried out on the potato plant, where the purpose was to study the effect of Rhizoflo Premium on the appearance of harmful organisms, namely the colorado potato beetle, and two diseases, black leaf spotting (Alternaria solani) and potato mold (Phytophthora infestans). Rhizoflo Premium is a new generation product formulated from two bacterial isolates - Pseudomonas fluorescens and Azospirillium brasilense. Both of them belong to the rhizobacteria (PGPR), which are bacteria in the immediate vicinity of the roots of plants in the soil. Rhizobacteria fulfills criteria such as competitive root colonization, stimulating plant growth and inhibiting pathogenic microorganisms. The experiment was carried out on the Laboratory field of the Biotechnical Faculty in Ljubljana on the surface of 1279.8 m2. Three varieties were included in the experiment, 'Morgana', 'Sunita' and 'Primabelle', 1/3 of the potatoes were pre-soaked with the 'Rhizoflo' preparation, 1/3 were sprayed with Rhizoflo and 1/3 was not treated. We found that the effect of the Rhizoflo Premium preparation was a higher yield for treated tubers, as the final yield was significantly higher in soaked (average 40,43 t/ha) and sprayed tubers (average 34,65 t/ha) compared to control (average 32,75 t/ha). In the inventory of harmful organisms, we found that it did not have any influence on the differences in abundance between the treatments, since the presence of certain developmental phases of the Colorado beetle and the symptoms of the diseases varied between the treatments.