Published in Scientific Papers. Series A. Agronomy, Vol. LX
Written by Emil GEORGESCU, Luxiţa RÎŞNOVEANU, Maria TOADER , Alina Maria IONESCU , Radu GĂRGĂRIȚĂ , Lidia CANĂ
Cereal ground beetle (Zabrus tenebrioides Goeze) represents one of the most important pests of wheat crop, in southeast of the Romania. Larva lives in soil and represents the most damaging stage of this pest. Higher attacks can occur in case of wheat monoculture or plants emerged from untreated seeds. High soil moisture and moderate temperatures are favorable conditions for Zabrus tenebrioides larva development and attack. In this paper, authors collective present results concerning testing effectiveness of the seed treatment with both, low and high doses of imidacloprid and mixture (imidacloprid+tebuconazole), in climatic conditions from south-east of the Romania, at NARDI Fundulea. Favorable conditions for pest attack it has registered in period October 2014-March 2015, when attacked plants percent at wheat emerged from untreated seeds was 46.16% and October 2015-March 2016, when attacked plants percent at wheat emerged from untreated seeds was 32.89%. In last years, during autumn, periods with higher rainfall amount occurred when wheat plants were in first vegetation stages, the most critical period of this crop for cereal ground beetle attack. In all of the years from this study, highest effectiveness in protection of wheat plants against attack of Zabrus tenebrioides larva were provided by imidacloprid active ingredient, in dose of 0.88 and 1.66 l/t. Also, imidacloprid+tebuconazole active ingredients provide good protection for wheat crops against this pest. In case of different climatic conditions, registered in last years, seed treatment assign stable protection of wheat crop and represent an effective method for control of Zabrus tenebrioides
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