With the objective to evaluate the genotypes of soybeans when using the herbicides Imazaquim, diclosulam and sulfentrazone, this research was conducted at “ Fazenda Tres Irmãos “ pertaining to Jatai county, Goias, during the growing season 2000/2001. After planting the genotypes of soybeans in arenaceous soil, containing 17,19% clay, 44 g/kg of organic material and CTC of 12,49 cmol/dm³, the herbicides, imazaquin, diclosulan, and sulfentrazone, were sprayed pre-emergence in the following doses – 140 and 280g. /ha, 35 and 70g/ha, […]

A trial was carried out to test the efficacy and selective of formulation and doses of atrazine/ dimethenamid-p andatrazine/dimethenamid, in pre-emergence on corn (cv. Primaiz BR 3101). The following treatments were tested in a sandy Red Yellow Latossol soil, in Uberaba, Brazil: atrazine 396 g/L/dimethenamid-p 204 g/L (1800, 2100, 2400 and 2700 g/ha) and atrazine 320 g/L/ dimethenamid 289 g/L (2100, 2400, 2700 and 3000 g/ha), s-metolachlor 960 g/L (2880 g/ha) and hand weeding and weeded. The mixture of atrazine/dimethenamid-p […]

A trial was carried out to test the efficacy and selectivity of different formulations and doses of bentazon with acifluorfen, applied in post emergence of soybean (cv. Doko). The following treatments were tested in a sandy Latosoil, in Prudente de Morais, Brazil: bentazon+acifluorfen (480+204 g/ha and 600+255 g/ha) with or without mineral oil (0,25% v/v); bentazon+acifluorfen (480+168 g/ha and 600+210 g/ha) with or without mineral oil (0,25%v/v); and bentazon +acifluorfen 600+160 g/ha and weeded and no weeding checks. Independently of […]

This study aimed at evaluating the effects from increasing doses of different glyphosate salts – ammonium (Roundup WG), isopropylamine (Roundup Transorb) and potassic salt (Zapp Qi) – on Bidens pilosa plants under controlled conditions, when they were subjected to a 20-mm rainfall over 30 minutes, at intervals of 1, 2, 4, 6, 12 and 24 hours after application of these products. The efficiency of the glyphosate salts in controlling B. pilosa were affected when the rainfall occurred after their application. […]

An study was carried out in a commercial one-year-old coffee crop following undercutting, aiming to evaluate the efficiency of different glyphosate salts, that is, potassic, isopropylamine and diamonium in managing weeds in coffee tree crop. The treatments consisted of 10 different managements corresponding to three sequential applications of herbicides, that could be performed with or without the same products. The control efficiency of the weed species were verified at 15, 30, 41, 58, 75, 84, 116 and 140 days after […]

Two field assays were carried out aiming to evaluate the rain effects on the glyphosate herbicide activity, applied at different concentrations, under two growing seasons (winter and summer). The experiments were conducted at the FCAV / UNESP Experimental Station, during 2000/01. The winter experiment was installed from June to August of 2000 and the summer one was installed from January to March of 2001. The treatments were glyphosate (0,5; 1,0; 2,0 e 4,0%), used as check treatment. In the field, […]

The objective of this study was to determine the mobility of sulfentrazone in two soils classes as a function of increasing rain indices, as well as possible influences of the chemical and physical properties of soils with different iron oxides contents, on the herbicide action. The containers were 36 PVC tubes (10 cm diameter X 50 cm long). The containers were filled with soils and irrigated in 65%(w/w) and, then, the application of sulfentrazone (800g a.i/ha) was done on the […]

The objective this study was to evaluate the tolerance of the sugar-cane to the flazasulfuron and the herbicide efficiency on the Cyperus rotundus control. The experiment was carried on a sandy soil texture, at the Usina Destivale, at Araçatuba, SP. The used variety was RB 72-454. A randomized block design was used, with 12 treatments and 4 repetitions. The herbicides were applied in post-emergency of the crop and weeds, at 20 and 45 days after the plantation. The seletivity to […]

Foi conduzido um ensaio no município de Serranópolis-GO, com o objetivo de avaliar a eficiência agronômica e seletividade do herbicida COBRA aplicado isolado ou em mistura com CLASSIC, para o controle de plantas daninhas na cultura da soja. Os tratamentos foram: COBRA 0,625 e 0,750l/ha, COBRA + CLASSIC (0,5l + 50g)/ha, CLASSIC 80g/ha, além das testemunha com e sem capina. Conforme resultados  conclui se que: a) nas doses testadas os herbicidas foram seletivos para a cultura da soja; b) COBRA […]

Aiming at the control of the Brachiaria decumbens in degraded pastures of the Coast-Cross and Tifton 85 hybrids (Cynodon dactylon), two experiments were carried out, each one for each forage, where increasing doses of the commercial mixture diuron/ MSMA and one dose of MSMA were applied. The randomized block experimental design was used with seven treatments and four replicates. The plots were 6m long and 4m wide. The treatments were applied on the total area and on mature weeds. The […]

The objective of this research was to evaluate the efficiency in control of purslane (Commelina benghalensis) with mixtures of glyphosate potassium and butafenacil herbicides on coffee crop in February and May. Two experiments were carried out on Bom Retiro Farm, Vera Cruz-SP, Brazil. The treatments were: post emergence application of glyphosate potassium + butafenacil (100 g i.a./L) (1000+30; 1000+40; 1000+50; 1000+60; 1000+70; 1000+80; 1000+90; 1000+100 g/ha + mineral oil, 0,5% v/v), glyphosate + carfentrazone-ethyl (2000+30 g/ha + mineral oil, 0,5% […]

It intend with experiment evaluate the performance of the acetochlor herbicide by itself tank mix with nicosulfuron, applied in post emergency on the following weeds: Cenchrus echinatus, Digitaria horizontalis, Indigofera hirsuta, Portulaca oleracea, Ipomoea grandifolia. The experiment was conducted at the FCAV-UNESP CAMPUS, in Jaboticabal – SP, on red oxissol. Late on, it was evaluated the possible toxicity symptoms on the maize. The treatments were: acetochlor + nicosulfuron a 1,68 + 0,032; 2,52 + 0,032 and 3,36 + 0,032 Kg/ha, […]

The objective of this work was to evaluate the effect of different treatments with pre-emergent herbicides on the emergence, survival and initial growth of seedlings of tree species from riparian forests. The experiment was conducted in a greenhouse in a randomized blocks design with four replicates and five treatments. The herbicides used were imazapyr, atrazine, acetochlor and oxyfluorfen at the rates of 3,0L p.c./ha, 5,0L p.c./ha, 3,0L p.c./ha e 4,5L p.c./ha, respectively, plus a control treatment (no herbicide). Acetochlor showed […]

In Brazil studies of herbicides selectivity on the production parameters in sugar cane are generally carried out together with rehearsals of agronomic effectiveness in weeds and always using a checkplot per experimental replicate. When the contrast is analyzed considenry herbicide in relation to only one check without herbicide, there is a tendency in obtaining larger values for the variation coefficient, what could hide some effects of herbicides not selectives. Therefore, the objective of the present work, was specifically evaluate herbicide […]

The selectivity and efficacy of flumiclorac-pentil applied alone and as tank mixture with imazethapyr or cloransulam-metil on Euphorbia heterophylla L. were studied under field conditions. The study was conducted during the 2000/2001 growing season. The experimental design was a randomized completely block with four replications. The treatments (rate of active ingrediente per hectare) consisted of flumiclorac-pentil (60 gi.a./ha), flumiclorac-pentil (40 g) + imazethapyr (59,5 g), flumiclorac-pentil (40 g) + cloransulam-metil (30 g), imazethapyr (98 g) and cloransulam-metil (41 g). A […]