The response of parental components of ZP maize hybrids to effects of herbicides

Abstract

The response of four inbred lines, parental components of ZP maize hybrids, to effects of six herbicides applied after emergence of both, maize and weeds, was observed in the present study. The following herbicides were applied in the 2-3-leaf stage of maize: isoxaflutole (Merlin 750-WG) in the amount of 0.135 kg ha-1, nicosulfuron (Motivell) in the amount of 1.25 l ha-1, foramsulfuron (Equip) in the amount of 2.0 l ha-1, dicamba + rimsulfuron (Tarot plus) in the amount of 0.3 kg ha-1, mezotrion (Callisto) in the amount of 0.25 l ha-1 and thifensulfuron-methyl (Grid) in the amount of 0.02 kg ha-1. The phytotoxic effect of herbicides on the maize grain yield was evaluated according to the 1-9 EWRC scale. Maize inbreds showed different susceptibility depending on the applied herbicide. The least favourable effects in both years for all genotypes were obtained in the treatments with Tarot plus and Grid, in which the lowest values of maize grain yield were recorded.

U radu je ispitivana reakcija četiri samooplodne linije, roditeljskih komponenti ZP hibrida kukuruza na delovanje šest herbicida primenjenih posle nicanja kukuruza i korova (postemergence). U fazi 2-3 lista kukuruza primenjeni su sledeći herbicidi: izoksaflutol (Merlin 750-WG) u količini 0.135 kg ha-1, nikosulfuron (Motivell) u količini 1.25 l ha-1, foramsulfuron (Equip) u količini 2.0 l ha-1, dikamba + rimsulfuron (Tarot plus) u količini 0.3 kg ha-1, mezotrion (Callisto) u količini 0.25 l ha-1 i tifensulfuron-metil (Grid) u količini 0.02 kg ha-1. Praćen je fitotoksičan efekat herbicida po EWRC skali od 1-9 i prinos zrna kukuruza. Linije kukuruza su pokazale različitu osetljivost u zavisnosti od primenjenog herbicida. Najnepovoljniji efekti u obe godine ispitivanja, za sve genotipove, su dobijeni na tretmanima Tarot plus i Grid, gde su utvrđene i najniže vrednosti prinosa zrna kukuruza.