Evaluation of phytotoxicity and efficacy of acetochlor and dichlormid in corn crops

Abstract

The aim of this study was to determine the phytotoxicity and efficacy of the herbicide acetochlor with dichlormid (preparation ACETOCHLOR 768 + DICHLORMID 128 EC) and a possibility for its application in a foliar control of broadleaf weeds in corn crops. In 2012 there was conducted a serie of trials in accordance with the standard EPPO method, to examine the efficiency of this preparation, on the Zemun Polje locality. The experiment included four treatments: two for efficacy (ACETOCHLOR 768 + DICHLORMID 128 EC 2,0 l/ha and 2,5 l/ha), one for phytotoxicity (ACETOCHLOR 768 + DICHLORMID 128 EC 5,0 l/ha) and one as a standard (ACETOGAL PLUS 2,5 l/ha). The product was applied after planting and before germination of corn and weeds. Acetochlor as a selective herbicide from the chemical group of chloroacetamide did not show any phytotoxicity to corn, if applied in recommended quantities and on the recommended application time. Acetochlor with di­chlormid showed very high efficacy in the control of weeds such as Echinochloa crusgalli, Setariaglauca, Sorghum halepense (s), Bilderdykia convolvulus, Chenopodium polysper­mum, Datura stramonium, Solanum nigrum and Stachys annua.

Cilj ovog rada je bio da se utvrdi fitotoksičnost i efikasnost herbicida acetohlora sa dihlormidom (preparat ACETOHLOR 768 + DIHLORMID 128 EC) i mogućnost njihove primene za folijarno suzbijanje širokolisnih korova u usevu kukuruza. Tokom 2012. godine na lokalitetu Zemun Polje ispitivana je efikasnost ovog preparata izvođenjem poljskih ogleda u skladu sa standardnom EPPO metodom. U ogled je bilo uključeno 4 tretiranja: dva za efikasnost (ACETOHLOR 768 + DIHLORMID 128 EC 2,0 l/ha i 2,5 l/ha), jedan za fitotoksičnost (ACETOHLOR 768 + DIHLORMID 128 EC 5,0 l/ha) i jedan kao standard (ACETOGAL PLUS 2,5 l/ha). Preparat je primenjen posle setve, a pre nicanja kukuruza i korova. Acetohlor kao selektivni herbicid iz hemijske grupe hloracetamida, ne ispoljava fitotoksičnost prema kukuruzu, ako se primeni u preporučenim količinama i u preporučeno vreme primene. Acetohlor sa dihlormidom je pokazao veoma visoku efikasnost u suzbijanju korova kao što su: Echinochloa crusgalli, Setaria glauca, Sorghum halepense (s), Bilderdykia convolvulus, Chenopodium polyspermum, Datura stramonium, Solanum nigrum i Stachys annua.