INFLUENCE OF THE CLIMATIC CONDITIONS CONCERNING MAIZE LEAF WEEVIL (Tanymecus dilaticollis GYLL) ATTACK ON SUNFLOWER CROPS AT NARDI FUNDULEA

Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Emil GEORGESCU, Lidia CANA, Nicoleta BALABAN

The climatic conditions of the year 2012 were favorable for the maize leaf weevil attack (Tanymecus dilaticollis Gyll)on sunflower crops in south and south-east of the Romania. At NARDI Fundulea, the attack intensity of this pest atuntreated plants, on a scale from 1 (not attacked) to 9 (plant complete destroyed) was of 4.09 in 2012, 3.54 in 2011 and2.99 in 2010. Saved plants percent at untreated plants was of 80.75% in 2012, 87.75% in 2011 and 92.5% in 2010. Incase of treated seed with thiametoxan, clotianidin or two active ingredients combination (clotianidin+betaciflutrin), thesaved plants percent was higher then 98,25% in all of the three years taken in study. Seed treatment is the most effectivemethod to protect sunflower crop in first vegetation stages against maize leaf weevil attack.

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GEORGESCU E., CANA L., BALABAN N. 2013, INFLUENCE OF THE CLIMATIC CONDITIONS CONCERNING MAIZE LEAF WEEVIL (Tanymecus dilaticollis GYLL) ATTACK ON SUNFLOWER CROPS AT NARDI FUNDULEA. Scientific Papers. Series A. Agonomy., Vol. LVI, ISSN 2285-5785, 253-260.


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