INFLUENCE OF EUROPEAN CORN BORER (Ostrinia nubilalis Hübner) ON CORN HYBRIDS IN NORTH-WEST AND EASTERN CROATIA
2005
Zvjezdana Augustinović | Emilija Raspudić | Marija Ivezić | Mirjana Brmež | Marcela Andreata-Koren | Marijana Ivanek-Martinčić | Vesna Samobor
European corn borer (Ostrinia nubilalis Hubner) is one of the major corn pest in the world and in Croatia. Former investigations of corn borer in Croatia covered mostly its Eastern region. In trials conducted in 1998 and 1999 the research was extended to the North Western part of Croatia too. Macro trials were carried out with corn hybrids of FAO groups 200-600 at three localities: Križevci, Agricultural institute Osijek and at «Belje» PIK Karanac. In 1998 the intensity of the corn borer attack at the locality of «Belje» PIK Karanac was about 37.92% and in Agricultural institute Osijek 80.83%. In 1999 it varied between 37.08% at the locality of Agricultural Institute Osijek and 71.20% at the locality in Križevci. The estimated number of holes per plant in all three localities in both years was higher than the number of caterpillars. Length of damage per plant was between 0.38 and 18.80 cm. The data showed significant differences in the intensity of damaging effects on different localities while no significant differences concerning various hybrids were found. The statistical data concerning yield in both years showed significant differences among hybrids, localities and their interactions.
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