Revista Brasileira De Herbicidas 2015; 14(4): 326-332
Nozzles hydraulic, adjunctive and fomesafen application time in controlling beggar’s tick
The application of pesticides is affected by several factors. Among them, the time of application stands out, which can vary according to the target, the applied product and equipment used. This study aimed to evaluate hydraulic nozzles, adjuvant and fomesafen application time in controlling beggar’s tick. The treatments were arranged in a factorial 4x2x2, with the first factor consisting in four nozzles (API-11002; even (E) flat-fan, AD/D-11002; twin flat spray, AVI TWIN-11002; air induction (AI) twin flat spray-TQ, and APM-09502; Flood jet spray). The second with two application times (3 and 16 hours) and the third in two tank mixtures (with and without the addition of nonionic adhesive spreader adjuvant). The treatments were evaluated at 7, 14 and 21 days after the application, through the number of live plants, plant height, visual analysis and at 21 days the dry matter of the aerial part was made. The application at 16 hours provided better control of all traits, the JLSIP nozzle stood out causing further reduction of dry matter and of living plants, and the addition of adjuvant potentiated the application control at 16 hours. The application time influences the action of fomesafen, and that its application at 16 hours provides greater control of B. pilosa compared to that performed at 3. The JLSIP nozzle increases fomesafen action, also the addition of adjuvant potentiates the effect of this nozzle and the application held at 16 hours.
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