Research concerning weed control in maize crop

Abstract

The paper presents the results obtained under soil-climatic conditions of Cluj- Napoca, Romania, during 2003-2005. The main goal of experiments was to establish an optimal network for weed control in maize crops. High weed encroachment of maize crops in Cluj area has increased, due to weed seed stock in the arable layer and weather conditions, which allowed weeds to grow alternatively, and to the development of problem species during the maize vegetation period, when no tillage was performed. A good efficiency in controlling the entire weed spectrum from maize crops and with high persistence was the combination of an acetochlore-based herbicide. The variant RELAY 90EC 2.2 l/ha, applied at the stage of preemergence, florosulam based-herbicide and acid 2.4D: MUSTANG 0.6 l/ha, applied at the stage of post-emergence, had a control degree of 72%, for the entire vegetative period. The average control degree was achieved by variants controlled before emergence with DUAL GOLD 960 EC 1.5l/ha. In vegetation, the complex herbicides OLTISAN M. 1l/ha or RING 80 WG 25 g/ha were used, the average control degree being of 73%, respectively, 75%.