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Two species of leaf beetles from Chrysomelidae family i.e. the cereal leaf beetle Oulema melanopus (Linnaeus 1758) and the blue leaf beetle Oulema gallaeciana (Heyden 1970) can cause considerable damage to cereal crops. Improvement of short-term forecasting was focused on determination of optimal time of control of these pests that takes place at mass larval hatching. Thus long term studies were carried...
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