The slow initial growth and the small size of the pumpkin favor the establishment of weeds in the cultivated areas, requiring adequate management so that there is no reduction in productivity. However, there are currently no herbicides registered for pumpkin cultivation. Thus, the objective was to verify the selectivity of herbicides in pre and post-planting Japanese pumpkin seedlings. The experiments were conducted in a randomized block design with four replications. For pre-planting and post-planting applications, treatments were composed of herbicides; […]

Selectivity and efficiency are key characteristics for herbicide recommendation. The objective of this work was to evaluate weed control and sugarcane selectivity of the commercial sulfentrazone + diuron mixture (Stone, 700 g a.i. ha-1 of sulfentrazone + 1400 g a.i. ha-1 of diuron, SC, FMC) in five doses: D1: zero g a.i. ha-1; D2: 350 g a.i. ha-1 + 700 g a.i. ha-1; D3: 700 g a.i. ha-1 + 1400 g a.i. ha-1; D4: 1050 g a.i. ha-1 + 2100 […]

Safflower (Carthamus tinctorius L.) is an annual oleaginous plant that presents high potential in Brazilian agriculture. The chemical control of weeds in the crop is essential to avoid damage and protect productive potential. The objective of this study was to evaluate the selectivity of herbicides applied in pre-planting incorporated (PPI), pre-planting (PRE) and post-emergence (POST) of the safflower crop. For all, three experiments were installed in greenhouse with a completely randomized design with five replications. The herbicides evaluated for application […]

The seed treatment with safeners may increase the tolerance of crops to herbicides. An experiment was conducted to evaluate the effect of seed treatment with salicylic acid on the tolerance of wheat to flumioxazin. The design was completely randomized, with four replications. The treatments were arranged in a 2 x 6 factorial, where the first factor corresponded to the absence or presence of seed treatment with salicylic acid and the second factor to the doses of flumioxazin (0; 10; 20; […]

Pre-sprouting seedlings (MPB) of sugarcane arrive in the field with the aerial part and roots developed, being able to present sensitivity to herbicides and to change weed control management. Therefore, the objectives of this work were: determine the chemical control of Cynodon dactylon, Chloris polydactyla and Merremia aegyptia; and to determine the effect of the herbicides on pre-budded seedlings of different varieties of sugarcane. The experimental design was completely randomized with eleven treatments and four replicates. The herbicides saflufenacil, clomazone, […]

The weed control difficulties has been considered one of the most obstacles to success of forest recovery projects at degraded areas. This experiment aimed to evaluate the different pre‑emergent herbicides effect on seed emergence, seedling survival and initial development of Brazilian native tree species Platypodium elegans, Guazuma ulmifolia, Anadenanthera colubrine and Jacaranda micrantha. The experiment was conducted under greenhouse conditions in a completely randomized design with five replications. The treatments were constituted by the pre-emergence application of the following herbicides […]

Conventional corn cultivation has been taking up space in the national agricultural panorama due to the difficulty of controlling the corn in subsequent crops. However, glyphosate drift in adjacent crops has become a concern among producers and technicians. Thus the experiment was installed to evaluate the effect of low doses of glyphosate on the crop and the ability of a plant hormone-based biostimulant to reverse the injuries caused by the herbicide, evaluating the morphological characteristics and photosynthetic rate of corn […]

The tomato plant is an oleraceous that has low tolerance to most of the herbicides used, which limits the use of chemical products in integrated weed management. By this fact, this study was conducted for evaluating the efficacy and selectivity of the metribuzin and diuron, both applied before transplanting the tomato crop, upon different cover crops. Seeds of tomato cv. IPA 6 were planted in trays and transplanted to pots at the stage of two leaves. The species used were: […]

The control of weeds in melon crops is hampered by the lack of selective herbicide information for the crop. The objective of this work was to evaluate the effect of post-emergence herbicide application on yellow melon and toad skin culture. Two experiments (one for each cultivar) were carried out in a completely randomized design with four replications. The treatments were composed by the application of the herbicides in post-emergence: fomesafen (250 g a.i. ha-1); flumioxazin (2000 g a.i. ha-1); fenoxaprop […]

Glyphosate is the main herbicide in weed control in soybean. However, phytotoxicity symptoms after application of this herbicide are reported in RR soybean. In this context, biostimulants can potentiate the metabolic activities of the plant in function of the bioregulators, amino acids and nutrients present in its formulation, becoming an alternative to minimize the phytotoxic effects of glyphosate. Thus, the objective of this work was to identify the use of biostimulants, derived from Ascophyllum nodosum, associated to the herbicide glyphosate […]