The work aimed to evaluate, in sugar cane crop, the selectivity and effectiveness of S-metolachlor herbicide associated to ametryn and [hexazinone+diuron], applied terrestrial and aerial forms, in pre and post emergent weeds control. The experimental design used in experiment 1 (terrestrial application) was randomized complete blocks with 16 treatments and four repetitions, applied in pre and post emergence:  S-metolachlor + ametryn (1920 + 1500;  2400 + 1500 and 2880 + 1500 g a.i. ha-1; S-metolachlor + [ hexazinone+diuron ] (1440 […]

In Brazil, there are no herbicides registered for crambe (Crambe abyssinica Hochst), and little is known about the selectivity of herbicides over this crop. Therefore, two experiments were conducted, simultaneously, in plastic green house, with the objective of evaluating the selectivity of herbicides sprayed in pre emergency over crambe crop initial development. In the first study, it was evaluated the answer-dose of herbicides treatments trifluralin (225, 450, 675 and 900 g ha-1), alachlor (240, 480, 720 and 960 g ha-1) […]

This study aimed to quantify the levels of fiber, cellulose and lignin in Brachiaria decumbent dossel, submitted to different doses of glyphosate. The experiment was carried out in a pasture area containing Brachiaria decumbens at Fazenda Experimental Lageado, FCA/UNESP, Botucatu County, São Paulo State. Treatments consisted of five glyphosate doses (36, 72, 180, 360 and 720 g ha-1) and an untreated control, by using a randomized complete block design with four replications. For herbicide application, a backpack sprayer pressurized by […]

This study aimed to evaluate the efficacy of several herbicides to control volunteer Roundup Ready soybean plants. The experiment was carried out in a greenhouse at Fesurv, Rio Verde – GO, in 2008, and the experimental plots were composed of pots of 10 dm3 of capacity. We have used the GR Valiosa® soybean cultivar, arranged in a randomized block design, replicated five times. It was applied the following treatments: atrazine (1,500 g ha-1), tembotrione (100.8 g ha-1), mesotrione (120 g […]

With the objective of verifying the effect of low doses, simulating glyphosate herbicide drift in growth and initial development of Commmelina benghalensis, a study was conducted in greenhouse conditions. C. benghalensis was superficially sowed (approximately 2 cm) in small tubes filled out with substratum. After the germination, just one plant by tube was kept and treatments were applied. Treatments were constituted by different glyphosate doses, 2, 4, 8, 16, 20 and 24 g a.e. ha-1 and a check without application. […]