Phytopharmacologic value of new herbicides in sugar beet

Abstract

Trials were conducted during 1998 and 1999 to determine efficacy of new herbicide mixtures in weed control in sugar beet. Sequential application of mixtures one of residual herbicides (5-metolachlor, dimethenamid alone or with chloridazon) folowed by application of one or several post-emergence herbicides (phenmedipham + desmedipham + chloridazon or phenmedipham + desmedipham + ethofumesate, triflusulfuron, metamitron, clopyralid, cycloxydim and fenoxaprop-P-ethyl) were studied. Results from two-years trials suggested that pre-emergence + post-emergence herbicides showed similar effects in weed control than only sequential application of post-emergence herbicides. Mixtures with triflusulfuron-methyl provided better control of Abutilon theophrasti and Hibiscus trionum than other herbicide mixtures.

Tokom 1998. i 1999. godine izvedeni su ogledi radi ocene efikasnosti kombinacija novijih herbicida u suzbijanju korova u šećernoj repi. Ispitivane su višekratne primene kombinacija pre-emergence preparata Frontier 900EC (pre-emergence sam i u kombinaciji sa Pyramin turbo) i Dual Gold sa preparatima ili kombinacijama preparata za primenu posle nicanja, a takođe i samo dvokratne primene post-emergence herbicida (Regio, Betanal AM11, Galbetan, Betanal progress AM, Betanal progress OF, Safari 50DF, Nortron super, Lontrel 100, Focus Ultra, Furore super). Programi sa kombinacijama pre-emergence + post-emergence herbicida ostvarili su bolji ili približan herbicidni efekat kao i dvokratna primena samo post-emergence herbicida, bez značajnijih razlika u ostvarenom prinosu korena. Najbolju efikasnost u suzbijanju korova Abutilon theophrastii Hibiscus trionum, ostvarile su kombinacije sa preparatom Safari 50DF.