Authors : Ioan Gontariu and Ioan Catalin Enea
Abstract: Fungus infects young leaves by direct penetration into epidermis or through stomata. C. sativus produces distinct elongate brown-black lesions (spot-blotch) that rarely >1 cm in length. The blotchy lesions contrast sharply with green or leaf tissue. Primary infections occur on coleoptiles, primary roots and subcrown internodes. Secondary conidia develop on the above-ground parts of plant. They disperse by wind and initiate lesions on leaves and culms. The circulation of Cochliobolus sativus fungus is realized through seed and soil as well the attack manifesting on the young plants and also during the whole period of vegetation. The efficiency of some fungicides applied to seed and during vegetation was tested. In order to control this patogen, two treatments were applied. From the researches made by RSDS Suceava for a longer period of time, researchers found out that the grain losses are almost 14% from the total production if there are not made any seed treatments and of minimum 16% if there are not applied two foliar treatments in the vegetation.
Ioan Gontariu and Ioan Catalin Enea, 2012. Studies on the Efficiency of Some Fungicide at Two-Row Spring Barley for Fighting Against Spot Blotch (Cochliobolus sativus Ito and Kurib) in the North-West Suceava Plateau. Agricultural Journal, 7: 70-73.