Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 1
Written by Emil GEORGESCU, Maria TOADER, Lidia CANĂ, Luxiţa RÎŞNOVEANU
European corn borer (Ostrinia nubilalis Hbn) is one of the most important maize pests in Romania, especially in the central and western region of the country, in hilly areas and along the main rivers, in the Danube flooded plains. However, in last years, ECB produce high damages at maize crops in south and south-east of the Romania, too. In this paper there were presented results of a study concerning both chemical and biological control of this pest at maize crop, between 2016 and 2018, in the climatic conditions from south-east of the Romania. The experiences were carried out at NARDI Fundulea, Calarasi County. Five days before foliar spraying, maize plants were artificial infested witch ECB egg batches produced in laboratory conditions, from insects reared consecutive generations, using same artificial diet. Climatic conditions from first 15 days of July, when it has made artificial infestation of the maize plants were favourable for ECB attack in all studied years. As result, the attack of this pest at maize untreated plants was high. Foliar application of both, chemical and biological insecticides, provide effective protection of the maize plants, against ECB larva attack, in first week after the treatments. However, in the climatic conditions of the years 2016 and 2017, at treated variants, it has observed highest amount of ECB larva/plant, at assessment made in autumn, comparative with first assessment made at 5 days after the treatments.
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