Abstract Background although efficient, there are still few options for selective treatments with herbicides applied in the pre-emergence of cotton, and treatments that result in injuries to the crop are often carried out. Objective to evaluate the influence of the amount of bean or oat straw on the selectivity of the fomesafen herbicide applied in pre-emergence of cotton. Method two experiments were carried out simultaneously in a greenhouse in a completely randomized design, with four replications. The experimental units were […]

The straw left on the soil surface after the sugarcane mechanical harvest affects directly the weed infestation, due to, among others, the limitation of temperature variation on the seed bank, the formation of a physical barrier which enables weed emergence, and the possible allelopathic effect of the sugarcane straw. On the other hand, the straw also works as a barrier to the herbicide until it is leached into the soil. The objective of this study was to test the effect of herbicides amicarbazone and imazapic applied on different amounts of straw for the control of Luffa aegyptiaca, Ipomoea hederifolia and Bidens pilosa. Two herbicides – amicarbazone and imazapic were tested at three different rates: 1008 g a.i. […]