Options and application of sulfonylurea and triketone herbicides in crop of maize inbred lines

Abstract

Herbicide efficacy is one of the most important herbicide properties. In addition to efficacy, the herbicide should possess certain selectivity for the crops. If there is not selectivity, it is possible to damage the plants after herbicide application, which can lead to loss of yield. The growing technology of broad row crops, such as maize, involves the application of herbicides as a measure of weed control. The aim of this study was to examine the selectivity of sulfonylurea and triketons herbicides applied in five lines, following visual plant changes (EWRC) and grain yield. Herbicides were applied at recommended doses for the production of hybrid maize, as well as in double doses. The applied triketons (mesotrione and topramezone) did not cause significant damage to the lines tested, unlike sulfonylureas (rimsulfuron and foramsulfuron). Sulfonylureas significantly influence of grain yield, the highest in early maturity group lines. Triketons had no effect on grain yield of maize lines examined.

Efikasnost prema korovima je jedna od najbitnijih osobina herbicida. Pored efikasnosti, herbicid bi trebalo da poseduje i odgovarajuću selektivnost prema usevu u kome se primenjuje. Ukoliko se selektivnost herbicida nedovoljno poznaje moguće je da dođe do oštećenja useva posle primene, što može dovesti i do gubitka prinosa. Tehnologija gajenja širokorednih useva, kakav je kukuruz, podrazumeva primenu herbicida, kao meru suzbijanja korova. Cilj ovog rada je bio da se ispita selektivnost sulfonilurea i triketonskih herbicida u usevu pet linija kukuruza, praćenjem vizuelnih promena na samim gajenim biljakama (EWRC) i prinosa zrna. Herbicidi su primenjeni u količinama preporučenim za proizvodnju hibridnog kukuruza, kao i u dvostruko većim. Triketonski herbicidi (mezotrion i topramezon) nisu izazvali značajna oštećenja na ispitivanim linijama, za razliku od sulfonilurea herbicida (rimsulfuron i foramsulfuron). Prinos zrna linija kukuruza pod uticajem sulfonilurea je značajno varirao, najviše kod linija ranih grupa zrenja. Triketonski herbicidi nisu imali uticaja na prinos zrna ispitivanih linija kukuruza.