Evaluation of the effect of different herbicides and herbicidal combinations on mixed weed flora and Vicia ervilia L. yield

Sofiya Petrova, Stanislav Stamatov and Blagoy Andonov
Agricultural Academy, Institute of Plant Genetic Resources, 4122 Sadovo, Bulgaria

Abstract

Petrova, S., Stamatov, S. & Andonov, B. (2022). Evaluation of the effect of different herbicides and herbicidal combinations on mixed weed flora and Vicia ervilia L. yield. Bulg. J. Agric. Sci., 28 (3), 408–412

The effect of different herbicides and herbicidal combinations on mixed weed flora and bitter vetch yield is studied. In each plot, except weedy check the herbicides and herbicide combinations are used in pre-emergence applications at different doses and in different mixtures in order to assess weed control ability and selectivity to the crop. Efficiency against major weeds showed the use of clomazone + pendimethalin – 200 ml/da, as well as a herbicide combination – beflubutamide – 50 ml + S-metolachlor – 120 ml/da. During the studied period, in the weed population predominate Amaranthus caudatus L.. This weed together with Convolvulus arvensis L. determines the total weeding. With the increase of the total number of weeds in 1 m2 plot, the bitter vetch yield decreases in linear dependence.

Kewwords: Vicia ervilia; weeds; herbicides; herbicide combinations; selectivity

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