The tolerance of local maize cultivars to stalk rot
2001
Rozman, L. | Milevoj, L. | Valic, N. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Agronomy Dept.) | Palaversic, B. | Vragolovic, A. (Institut za oplemenjivanje i proizvodnju bilja d.d., Zagreb (Croatia))
The resistance against stalk rot of two slovenian populations, and four slovenian and 15 croatian maize hybrids, was investigated during two years. In the first year, the attack was stronger on two locations in Croatia (Rugvica, Ludbreg), when compared with the slovenian locations (Jable, Ljubljana). The incidence of broken stalks was higher in locations where the disease was more severe. There were significant differences for stalk rot (in field conditions). The most tolerant hybrids were H-13/99, H-9/99, H-5/99 and H-7/99, but H-4/99, H-6/99, and both populations were found to be the most susceptible. In 1999, the stalk anthracnose, caused by the fungus Colletotrichum graminicola (/Ces./ G. W. Wils.) was detected in Slovenia for the first time. In the experimental station at Jable, 2-35 % of the plants of various hybrids were affected by this fungus. The first artificial inoculation with this fungus took place in 2000. The significant differences among the studied cultivars were found only when the plants had been artificially inoculated. The most susceptible cultivars were H-15/00 and H-7/00, and the most tolerant were H-2/00 and H-13/00. However, in natural conditions the most susceptible were H-6/00 and H-7/00 at Jable, and H-13/00 and H-10/00 at Rugvica, but H-4/00 and H-13/00 (Jable), and H-12/00 and H-15/00 (Rugvica) appeared to be tolerant.
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