Nekajletne izkušnje pri zatiranju sive grozdne plesni (Botrytinia fuckeliana) na Primorskem

Mateja Blažič, Gabrijel SELJAK, Ivan ŽEŽLINA

Kmetijsko veterinarski zavod Nova Gorica, SI-5000 Nova Gorica, Slovenija

Na  Primorskem, so bile v daljšem časovnem obdobju preizkušene možnosti za omejitev pojava sive grozdne plesni, ki lahko v posameznih letih bistveno zmanjšuje kakovost in  količino grozdja. V prispevku so predstavljeni rezultati petletnih poskusov v katerih so bili preizkušeni naslednji botriticidi: fludioksonil + ciprodinil (Switch), iprodion (Kidan), pirimetanil (Mythos), fenheksamid (Teldor), Trichoderma harzianum (Trichodeks), prosimidon (Sumileks), vinklozolin + tiram (Silbos), vinklozolin (Ronilan), diklofluanid (Euparen), tolilfluanid (Euparen M), tolilfluanid + tebukonazol (Folicur EM), folpet + Al-fosetil (Mikal). Nekateri od botriticidov so bili uporabljeni v različnih koncentracijah in različnih kombinacijah. Med novejšimi botriticidi je najmanj spremenljivo učinkovitost v obdobju petih let pokazala kombinacija aktivnih snovi fluoksidinil + ciprodinil. Botriticidi iz skupine dikarboksimidov (iprodion, prosimidon, vinklozolin), so bili manj učinkoviti kot na začetku uvajanja v uporabo, a še vedno delujejo zadovoljivo. Sredstva, ki imajo zgolj stransko botriticidno delovanje (diklofluanid, tolifluanid, tolifluanid + tebukonazol in folpet + Al–fosetil), so bila manj učinkovita. Delovanje biotičnega pripravka na podlagi glivice Trichoderma harzianum (Trichodex) pa je v humidnih razmerah zahodne Slovenije skromno.

Abstract

  Some years experiences of control of Botrytinia fuckeliana in the Coastal region

In the Coastal region of Slovenia, there were tested in a long period some possibilities to control the Botrytinia fuckeliana, which can decrease quality and quantity of grape yield. The results of 5 year trials are presented. There were tested the following botryticides: fludioxonil + cyprodinil (Switch), iprodione (Kidan), pyrimethanil (Mythos), fenheksamid (Teldor), Trichoderma harzianum (Trichodeks), procymidone (Sumileks), vinclozolin + thiram (Silbos), vinclozolin (Ronilan), diclofluanid (Euparen), tolylfluanid (Euparen M), tolylfluanid + tebuconazole (Folicur EM), folpet + fosetyl-Al (Mikal). Some of botryticides were used in different concentrations and different combinations. In five year period the combination of active ingredients fludioxonil + cyprodinil indicated the least variable efficiency among  new botryticides. In the same period botryticides from the group of dikarboksimides (iprodione, procymidone, vinclozolin) were less efficient as they were at the beginning of their use, but they are still enough efficient. Botryticides (dichlofluanid, tolylfluanid, tolyfluanid + tebukonazol, folpet + fosetyl-Al) which have only side effect on Botrytinia fuckeliana were less efficient. Plant protection product on the base of Trichoderma harzianum (Trichodex) indicated insufficient efficacy in humid conditions of west Slovenia.