Integralni sistem mera u kontroli zakorovljenosti kukuruza

A joint effect of four cropping practices (irrigation, crop density, hybrid and herbicide application) on maize weed infestation, expressed by fresh mass of weeds (g m-2), was monitored in a four year period (1996-1999). Fresh mass of weeds was higher on the average for all years in the area under irrigation than in the area under rainfed conditions and it statistically significantly decreased under increased crop densities. Fresh mass of weeds was significantly higher in the control than in the herbicide treated variant. The increased crop density and herbicide application interaction affected fresh mass of weeds in such a way that it was the lowest in the highest density in the treated variant almost in each year of investigation. In addition, fresh mass of weeds was affected by the herbicide application and maize hybrid interaction.U četvorogodišnjem periodu 1996-1999. godine ispitivan je uticaj kombinovane primene četiri mere gajenja (navodnjavanja, gustine useva, hibrida i primene herbicida) na zakorovljenost kukuruza, izraženu kroz svežu masu korova (g m-2). Sveža masa korova je, prosečno za sve godine, bila veća na površini u navodnjavanju i statistički se značajno smanjivala sa povećanjem gustine gajenja. Sveža masa korova je bila statistički vrlo značajno veća na kontrolnoj u odnosu na herbicidima tretiranu varijantu. Ukupna sveža masa korova, u uslovima prirodnog vodnog režima, bila je veća u hibridu ZPSC 704, a u uslovima navodnjavanja u hibridu ZPSC 42A. Povećana gustina gajenja i primena herbicida u interakciji su uticale da sveža masa korova bude najmanja u najvećoj gustini, na tretiranoj varijanti skoro u svim godinama ispitivanja. Na svežu masu korova, uticala je i interakcija primene herbicida sa hibridom kukuruza. Dobijeni rezultati idu u prilog pretpostavci da se, i u našim uslovima, primenom vise mera kao delà integralnog sistema, uz primenu herbicida, mogu uspešno suzbijati korovi u kukuruzu