Original scientific paper

EFFECTIVENESS OF SOME POST-EMERGENCE HERBICIDES IN SOYBEAN

Mira Knežević ; Faculty of Agriculture, J.J.Strossmayer University of Osijek, Osijek, Croatia
Manda Antunović ; Faculty of Agriculture, J.J.Strossmayer University of Osijek, Osijek, Croatia
Ljubica Ranogajec ; Faculty of Agriculture, J.J.Strossmayer University of Osijek, Osijek, Croatia
Renata Baličević ; Faculty of Agriculture, J.J.Strossmayer University of Osijek, Osijek, Croatia

Abstract

A three-year field experiment was conducted in soybean on lessive pseudogley soil at Čačinci locality (P.P. Orahovica d.d.) in North-eastern Croatia to evaluate the effectiveness of chemical weed control through single or multiple applications of post-emergence herbicides, alone or in combinations and their effects on soybean yields. Main weeds were summer annual species of Echinochloa crus-galli (140 - 269 shoots/m2), Ambrosia artemisiifolia (8-56 plants/m2) and Chenopodium album (3-12 plants/m2). All herbicide treatments showed high efficacy in control of annual grass- and broad-leaved weeds, but were ineffective against perennial weeds. Multiple applications of post-em. herbicide combinations of oxasulfuron + imazamox (92%), clethodim + fomesafen (93%) and oxasulfuron + imazamox + thifensulfuron methyl (94%) at reduced rates, provided better weed control compared to a single application of oxasulfuron (91%) and imazamox (89%) at recommended rates. No significant differences were observed in yields between herbicide treatments, ranging from 3395 kg to 3496 kg /ha, on average.

Keywords

soybean; weed density; post-em. herbicides; weed control (%); crop yield

Hrčak ID:

31236

URI

https://hrcak.srce.hr/31236

Publication date:

18.12.2008.

Article data in other languages: croatian

Visits: 3.038 *