The breath test is a indirect biochemical test that means to measure the amount of oxygen consumed, has been extensively used in measuring the respiration rate of seeds and soil respiration. The objective was to develop and validate a methodology to assess sprouting of purple nutsedge (Cyperus rotundus) tubers by breathing test. In order to develop the methodology, tests were carried out with the objective of homogenizing the sprouting. In these tests the tubers suffered a preconditioning with glucose, gibberelic […]

The use of herbicides for weed control have improved in the last years, mainly for the control of purple nutsedge (Cyperus rotundus L.) and other perennial weeds. In order to study the control of purple nutsedge, sulfentrazone and flazasulfuron isolated and in mixture, were applied in field conditions with high infestation of this species and repeated on the second year. The variable analysed were viability of the tubers of C. rotundus at 90 and 300 DAT in 2004 and at […]

The research aimed to evaluate the effects of insecticides/nematicides interaction, applied at planting groove, and herbicides in pre and post-emergence, in the initial stage of sugarcane crop. The experimental design for pre and post emergency conditions was randomized complete blocks with three replications distributed into split plot, with insecticides located in the plots and herbicides in the splits. Studied inseticides were carbofuran (2100 g ha-1) and aldicarb (1500 g ha-1) and the herbicides in pre emergency conditions were tebuthiuron (1000 […]

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 […]