Selectivity of latifolicide herbicide combinations with lactofen for the soybean crop

Abstract

Combinations of herbicides are frequently aiming the increase of the control of the florist weed complex. This work aimed to study the effects of the herbicide lactofen in combination with bentazon, fomesafen, chlorimuron-ethyl and imazethapyr for the soybean crop, variety BR-37. A field experiment was set up in Maringá, Paraná State, Brazil, without weed plants to avoid possible interference on the crop. The combined treatments were carried out on the crop applying constantly each product at 75, 50 and 25% of the recommended rate, along the crop lines, allowing also cross applications, to form the combinations of the herbicides and four diagonal. The comparison among average productivityes was performed calculating the reliance interval of the controls and of each treatment, using the T test at 5%. The combinations were selective for the soybean crop. Reductions in soybean productivities were verified among the combinations with the herbicides in high rates, suggesting the need for more research in this area.