Abstract
Fungal diseases in wheat crops (Triticum aestivum) cause significant yield and quality grain losses worldwide. The increase in the crop production area under no-tillage and environmental changes has favored residue-borne fungal survival and, therefore, disease development. Field trials were carried out at the beginning of anthesis on wheat crops (state z61), in order to evaluate different spray nozzle performance. The test was arranged in a 4x2 factorial design with ten repetitions. Factors consisted in four nozzles: flat-fan (XR11002), air induction asymmetrical dual flat-fan (AI3070-02), air induction symmetrical dual flat-fan (GAT11002), hollow cone (TXA8002), and two artificial targets, one vertical and another horizontal related to head and flag leaf location, respectively. Water-sensitive cards and CIR 1.5® software were used to determine droplet density (DD), coverage, and deposition. The latter was contrasted using Brilliant Blue tracer. Data were subjected to anova and means were compared by Tukey test (p≤0,05). The use of fine droplets and multiple directions such as TXA8002 increases coverage and deposition in the vertical and horizontal target, under optimum environmental conditions. The methodologies used to evaluate spraying performance are complementary to completely characterize the application parameters.
Highlights
Las enfermedades fúngicas en el cultivo de trigo (Triticum aestivum L.) ocasionan pérdidas importantes en el rendimiento y la calidad de los granos
The data analysis for all variables showed a significant interaction between measurement targets and the nozzles, the analysis was partitioned to evaluate the effect of the different nozzles on the head and the flag leaf
The TXA8002 nozzle showed the highest values and the double fan showed the lowest, while AP11002 showed an intermediate behavior. This trend was partly reported by Herrera Prat and others(11) and Derksen and others(13), attributing these differences to the smaller droplet spectrum of the hollow cone nozzles compared to the others
Summary
Las enfermedades fúngicas en el cultivo de trigo (Triticum aestivum L.) ocasionan pérdidas importantes en el rendimiento y la calidad de los granos. Derksen and others(13) obtained better coverage percentages, both on the head and on the flag leaf of a wheat crop, when sprayed with fine droplets (between 106 μm and 235 μm)(10).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
