APERA SPICA VENTI: A PROBLEM WEED IN STRAW CEREALS IN THE BANAT HILL AREA PUBLISHEDDan Nicolae Manea, Gicu Gabriel Arsene, Gheorghe Cârciu, Simion Alda
Experiments were carried out over two years (2007 and 2008) in Pirdea, in the Banat hill area, on a typical luvosoil with 34.5% argyle content, 2.19% humus, and a pH of 5.5. In 2007, winter wheat weeding reached 136 weeds/m 2 , of which 38.5% Apera spica venti and 61.5% dicot species such as Viola arvensis, Raphanus raphanistrum, Matricaria inodora, Cirsium arvense, and Convolvulus arvensis. In 2008, we identified 162 weeds/m 2 , of which 45.7% monocots (particularly Apera spica venti) and 54.3% annual and perennial dicots. Anti-graminaceae herbicides applied during vegetation were selective in winter wheat and had good results in controlling Apera spica venti: Puma super (95-92%), Assert 250 C (93-89%) and Grasp 25 SP (90-85%). Taking into account the relatively large number of dicot weeds, it is necessary to complete the treatment during vegetation with an anti-dicot herbicide (e.g. Icedin Super). In these variants we also obtained the highest yield increases (356-613 kg/ha in 2007 and 534-815 kg/ha in 2008). Among herbicides applied pre-emergently, the best results in controlling weeding degree in winter wheat (91-88%) was with Dicuran Forte, while Cougar and particularly Treflan 48 were less efficient, their effect being impacted by the precipitations during the period following treatment application. Yield increase ensured by Dicuran Forte was 384 kg/ha in 2007 and 508 kg/ha in 2008.
winter wheat; weed control; Apera spica venti; herbicides; selectivity; eficiency