The objective of this work was to evaluate the deposition of a tracer solution constituted by glyphosate (2,160 g ha-1) + FD & C No. 1 (2,000 ppm) blushing with different sprayer nozzles in burndown of Panicum maximum cv. Mombaça plants, besides the  losses quantification of the sprayer to the soil. A randomized complete block design was used with four replications. Each experimental unit consisted of three lines with 5m long, spiced of 1.0 m. Treatments were applied 12 months […]

The use of scientific knowledge that make possible the characterization and choice of spray nozzle suitable to control of biological target is a function of application technology. This work aimed to characterize the volumetric distribution, the spacing between nozzles, the diameter and uniformity of droplets produced by spraying nozzle of centrifugal energy and control in post-emergence of I. hederifolia with herbicide diuron + hexazinone (1170 g ha-1 + 330 g ha-1) using spray volumes of 20 and 40 L.ha-1 with […]

For cultivars with indeterminate habit, there are no reports of the most appropriate period to conducted burndown in pre-harvest. The study aimed to evaluate the influence of burndown on three different times over physiological and sanitary quality of seeds and agronomic characteristics of SYN-9074 RR cultivar with indeterminate habit, in three areas simultaneously. It was used a randomized complete block design with four replications, and joint analysis were conducted for the three distinct areas. Treatments refer to the application period […]

The aim of the work was to evaluate the effect of nozzles and pressures on the spray drift from glyphosate + 2,4-D. The nozzles designs and the respective studied pressures were: XR 11002 (150 and 300 kPa), DG 11002 (300 kPa), TT 11002 (300 kPa), AI 11002 (300 kPa) and TXVS-10 (400 kPa). Nylon strings outside the application area (1, 5, 10, 20, 50, 100 and 200 m distance) with four replications and six foam cylinders placed on the boom […]

This work aimed to evaluate associations between adjuvant to herbicides used in burndown and weeds control in post emergence conditions in wheat crop. The experiment was conducted by using randomized complete blocks with four repetitions, in factorial scheme 2 x 5 + 1, constituted by two burndown forms in pre sowing, represented by only one application and in sequence, with five adjuvant combinations (without adjuvant; Triunfo 515®; Grap Super Gun®; Assist® and Fulltec®) and a check without application. All treatments […]

The aim of this study was evaluate the interaction between adjuvants and spray nozzles Euphorbia heterophylla control with mesotrione. Was held application of the herbicide by three models of spray nozzles (TT 110.02, AI 110.02 and TTI 110.02) and two dosages of mineral and vegetal oil (0.5 and 3.0%). Also was verified the qualitative attributes of nozzles, using a distribution table and a droplet analyzer laser. We evaluated the visual intoxication in plants at 2, 7, 14 and 21 days […]

The incorporation of tools related to the technology of application of pesticides is inevitable for a sustainable agriculture. We tested the efficiency in the control of Ipomoea nil in initial after-emergency with diuron + hexazinone, in two volumes of application (20 ha-1 and 40 L ha-1), with or without the addition of adjuvant, using peaks of rotating and hydraulically spraying, comparatively. Other two assays had been carried to compare the volumetric distribution of solution and the diameter of the drops […]

An experiment was carried out in the eucalyptus area of Capão Bonito in the São Paulo state, Brazil, to evaluated the efficacy of the aerial application of the herbicides sulfentrazone and isoxaflutole using clay granules for weed control in Eucalyptus area. Aerial application of the herbicides sulfentrazone at 500 and 750 g a.i. ha-1 and isoxaflutole at 150 e 225 g a.i. ha-1, was carried out using clay granules with 1,05 g cm-3 density, high absorption capacity (24 ml 100 […]

This study objectified to determine the effect of the ripeners, ethephon, trinexapac ethyl, sulfumeturon metal, fluazifop-p-butil and glyphosate, over technological quality and sugarcane yield. The experiment was carried out in ratoon cane, (RB86 – 7515 genotype) at Santa Antonina Farm, in Sertãozinho County, São Paulo State, in 2007 agricultural year. The experimental design used was randomized complete block with four replications. Treatments tested were constituted by: glyphosate at 0.40 L ha-1, sulfumeturon-methyl 20 g ha-1, sulfumeturonmethyl 10 g ha-1 glyphosate […]

The research aimed to evaluate the behavior of various pH reducers and metals complexers, under laboratory conditions. Were used 15 commercial products (10 pH reducers and 5 metals complexers), added to the spray mix. Five experiments were conducted; two to assess the stability of pH, after addition of pH reducers (Experiment 1) and metals complexers (Experiment 2) at 1% concentration, two to determine the necessary quantity of pH reducers (Experiment 3) and metals complexers (Experiment 4) to pH 3.5, an experiment […]