Aktuelna istraživanja i nove tehnologije u zaštiti ratarskih biljaka

Abstract

Prouzrokovač žutomrke pegavosti lista pšenice (Pyrenophora tritici-repentis) u 2005. i 2006. godini zabeležen je u jačem intenzitetu na više lokaliteta u Srbiji. U prirodnim uslovima zaraze najniži intenziteti bili su kod sorte ozime pšenice Simonida (trag). Najosetljivije prema P. tritici-repentis bile su tvrde (durum) sorte pšenice Durumko i Dušan sa ocenom 03 i intenzitetom od 40%, dok je sorta tritikalea Odisej, imala ocenu 03 sa intenzitetom trag do 5%. Primena biološkog preparat Koni WG koji sadrži spore Coniothirium minitans na neaktivnom nosaču, pokazala je da je inaktiviranost sklerocija i to trajna, bila oko 67 % zbog parazitiranosti od strane aktivnog agensa u preparatu. Većina insekticida nanetih na seme obezbedila je značajno bolji sklop šećerne repe u odnosu na netretiranu kontrolu.

In 2005 and 2006, the agent of tan spot, Pyrenophora tritici-repentis, was registered in high intensities in several locations u Serbia. Under conditions of natural infection, lowest disease intensities were observed in the winter wheat cultivar Simonida (trace). Most sensitive to P.tritici-repentis were the durum wheat cultivars Durumko and Dusan, rated 03 and exhibiting the infection intensity of 40%, while the triticale cultivar Odisej was rated 03 and the infection intensity in traces, to 5%. The application of the biological fungicide Koni WQ, which contains Coniothirium minitans spores in an inactive substrate, showed that the permanent inactivation of sclerotia amounted to about 67%, in response to the action of the fungicide's active agent. Most of the insecticides used for seed treatment provided a significantly better sugarbeet stand that the untreated control.