Effect of the spray volume adjustment model on the efficiency of fungicides and residues in processing tomato

  • Henryk Ratajkiewicz Poznań University of Life Sciences, Faculty of Horticulture and Landscape Architecture, Dept. Entomology and Environmental Protection. Dabrowskiego 159, 60-594 Poznań
  • Roman Kierzek Institute of Plant Protection National Research Institute, Dept. Weed Science and Plant Protection Technique. Władysława Węgorka 20, 60-318 Poznań
  • Michał Raczkowski Institute of Plant Protection National Research Institute, Dept. Pesticide Residue Research, Władysława Węgorka 20, 60-318 Poznań
  • Agnieszka Hołodyńska-Kulas Institute of Plant Protection National Research Institute, Dept. Pesticide Residue Research, Władysława Węgorka 20, 60-318 Poznań
  • Agnieszka Łacka Poznań University of Life Sciences, Faculty of Agronomy and Bioengineering, Dept. Mathematical and Statistical Methods. Wojska Polskiego 28, 60-637 Poznań
  • Andrzej Wójtowicz Institute of Plant Protection National Research Institute, Information, Economy and Decision-Making Systems in Plant Protection – Project. Władysława Węgorka 20, 60-318 Poznań
  • Marek Wachowiak Institute of Plant Protection National Research Institute, Dept. Weed Science and Plant Protection Technique. Władysława Węgorka 20, 60-318 Poznań
Keywords: azoxystrobin, chlorothalonil, Phytophthora infestans, spray deposit, QuEChERS


This study compared the effects of a proportionate spray volume (PSV) adjustment model and a fixed model (300 L/ha) on the infestation of processing tomato with potato late blight (Phytophthora infestans (Mont.) de Bary) (PLB) and azoxystrobin and chlorothalonil residues in fruits in three consecutive seasons. The fungicides were applied in alternating system with or without two spreader adjuvants. The proportionate spray volume adjustment model was based on the number of leaves on plants and spray volume index. The modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method was optimized and validated for extraction of azoxystrobin and chlorothalonil residue. Gas chromatography with a nitrogen and phosphorus detector and an electron capture detector were used for the analysis of fungicides. The results showed that higher fungicidal residues were connected with lower infestation of tomato with PLB. PSV adjustment model resulted in lower infestation of tomato than the fixed model (300 L/ha) when fungicides were applied at half the dose without adjuvants. Higher expected spray interception into the tomato canopy with the PSV system was recognized as the reasons of better control of PLB. The spreader adjuvants did not have positive effect on the biological efficacy of spray volume application systems. The results suggest that PSV adjustment model can be used to determine the spray volume for fungicide application for processing tomato crop.


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How to Cite
RatajkiewiczH., KierzekR., RaczkowskiM., Hołodyńska-KulasA., ŁackaA., WójtowiczA., & WachowiakM. (2016). Effect of the spray volume adjustment model on the efficiency of fungicides and residues in processing tomato. Spanish Journal of Agricultural Research, 14(3), e1007. https://doi.org/10.5424/sjar/2016143-9339
Plant protection