Revista Brasileira De Herbicidas 2005; 4(2)
EFFECTS OF A COMMERCIAL MIXTURE OF AMETRYNE PLUS SIMAZINE WITH GLYPHOSATE AND PARAQUAT FOR WEED CONTROL IN COFFEE CROP
DOI: 10.7824/rbh.v4i2.28
This research was conducted from 01/06 to 03/08/98 at the location of Irai de Minas, with the objective of evaluating the biological activity of a commercial mixture of ametryne plus simazine with glyphosate and paraquat, for the control of Brachiaria plantaginea, Digitaria horizontalis, Amaranthus hybridus, Commelina benghalensis and Eleusine indica in a Catucai coffee crop. Treatments were constituted of two doses (2500+960 and 3000+960 g.ha-1) of the commercial mixture of ametryne plus simazine with glyphosate, two doses (2500+300 and 3000+300 g.ha-1) of ametryne plus simazine with paraquat compared with a single dose (2500+300 g.ha-1) of diuron with paraquat and two check treatments with no herbicides (hoeing and without hoeing). It was utilized a back-packed manual sprayer pressurized with CO2 at 39 lb/in2 , with four tee-jet nozzles 110.02 XR, calibrated at a flow rate of 200 liters of the solution per hectare. The experimental design used was a randomized complete-block with four replications. The evaluations of weed control were performed at 15, 30, 45 and 60 days after application. It was concluded that: 1) mixtures of ametryne plus simazine with glyphosate at doses of 2500 + 960 g.ha-1, control with efficacy B. plantaginea; 2) mixtures of ametryne plus simazine with glyphosate at doses of 3000 + 960 were efficient for the control of D. horizontalis and C. benghalensis up to 60 DAA and up to 45 DAA in the control of E. indica and A. hybridus; 3) the mixture of ametryne + simazine with paraquat at both doses studied controls efficiently C. benghalensis up to 45 days DAA; 4) the mixture diuron plus paraquat, was efficient for the control of A. hybridus and C. benghalensis.
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