The investigation of incidence of some maize leaf diseases in Croatia and in Slovenia
2001
Palaversic, B. (Institut za oplemenjivanje i proizvodnju bilja d.d., Zagreb (Croatia)) | Rozman, L. | Milevoj, L. | Celar, F. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Agronomy Dept.)
In 1999, on the two locations in Croatia (Rugvica, Ludbreg) and on the two locations in Slovenia (Ljubljana, Jable) the incidence of maize leaf diseases was investigated. The most frequent disease in both countries were the northern corn leaf blight (Exserohilum turcicum Pass.) and the maize rust (Puccinia sorghi Schw.); whereas the stalk anthracnose (Colletotrichum graminicola (Ces.) G. W. Wils.) and maize eyespot (Kabatiella zeae, Narita in Hiratsuka) were only slightly present. For the first time the test of different line materials in the glasshouse showed that the race 2 of the fungus Exserohilum turcicum is present also in Slovenia. This race was determined in all 11 isolates from 7 croatian locations. During the past two years we have been testing (with artificial inoculation) the tolerance/resistance of 4 slovenian and 15 croatian hybrids, and 2 slovenian populations. In the first year, H-13/99 and H-7/99 were found to be tolerant cultivars to the races 1 and 2 of Exserohilum turcicum, but H-2/99 and H-12/99 were susceptible. In the second year it was found that H-5/00 and H-4/00 were tolerant, and H-2/00, H-4/00 and H-10/00 susceptible to the race 2. In artificial conditions (when inoculated with the race 1) the most susceptible appeared to be H-13/00 and H-2/00.
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