VOLUNTEER CORN CONTROL WITH DIFFERENT ACTIVE PRINCIPLES

Abstract

THERE ARE SEVERAL COMPONENTS OF THE PROCESS THAT NEGATIVELY AFFECT AGRICULTURAL PRODUCTION, WITH WEEDS BEING ONE OF THE MOST CRUCIAL ASPECTS. THE CULTIVATION OF RR SOYBEANS WITH THE PRESENCE OF RR MAIZE IS CONSIDERED A TECHNICAL PROBLEM. THE CORN SEEDS THAT RESIST ON THE SOIL GERMINATE IN THE SOYBEAN CULTURE, INFESTING IT AND FORMING AN INTERSPECIFIC CONFLICT. THE OBJECTIVE OF THIS WORK WAS TO EVALUATE THE PERFORMANCE OF HERBICIDES FOR THE CONTROL OF VOLUNTARY RR MAIZE, IN DIFFERENT DOSAGES AND STAGES OF DEVELOPMENT. THE EXPERIMENT WAS CARRIED OUT AT FAZENDA RIO DOS BOIS, SILV�NIA, GO. THE PERIOD OF CONDUCTION OF THE EXPERIMENT WAS BETWEEN THE MONTHS OF APRIL AND MAY OF 2020. AN AREA OF �€‹�€‹125 M�² WAS DIVIDED, DIVIDED INTO FIVE BEDS WITH 25 M�², CONTAINING 50 CM OF SPACING BETWEEN LINES, 3.0 SEEDS M^-1 LINEAR^-1. THE CULTIVAR USED WAS THE HYBRID CORN 2B433PW FROM BREVANT�®, PLANTING WAS CARRIED OUT ON 20/04/2020. THE EXPERIMENTAL DESIGN WAS COMPLETELY RANDOMIZED BLOCKS WITH FOUR TREATMENTS AND FOUR REPLICATIONS, USING HERBICIDES TO CONTROL VOLUNTARY CORN. FOR THE INTERPRETATION OF THE RESULTS, CONTROL LEVELS (CONCEPTS) WERE DEFINED ACCORDING TO THE CONTROL EFFICIENCY RANGES, USING THE SCALE PROPOSED BY THE ASOCIACIÓN LATINOAMERICANA DE MALEZAS. IN THE THIRD EVALUATION MADE 21 DAYS AFTER THE APPLICATIONS, IT WAS OBSERVED A GREATER CONTROL OF THE TREATMENT WITH CLORIMURON IN THE PRE-EMERGENCE, AND WITH HALOXYFOPE IN THE POST-EMERGENCE, BRINGING AN EXCELLENT CONTROL TO ALL THE TREATED PLANTS. ALL WERE VERY EFFECTIVE, BOTH THE PRE-EMERGENT HERBICIDES SUCH AS CORIMUROM AND DICLOSULAN, BOTH IN THE POST-EMERGENTS SUCH AS HALOXYFOPE AND CLETODIM. CLORIMUROM AND HALOXYFOPE PROVED TO BE MORE EFFICIENT IN RELATION TO THE RAPID DEATH OF PLANTS.