Ozonla pestisit giderimi uygulamasının domateste renk ve C vitaminine etkileri
Özet
Tomatoes grown under field conditions were applied with three different pesticides (imidacloprid of neonicotinoids, fenazaquin of METI's and lambda-cyhalothrin of synthetic pyrethroids) and the effect of ozonation on vitamin C and colour were determined. Reduction rates were found as 40,9%, 57,8%, and 20,4% in imidacloropid, fenazaquin and lambda-cyhalothrin treated and ozonated water washed tomatoes, respectively. The reduction rates were found as 32,6%, 57,9%, and 8,3%, respectively, with water washed tomatoes. Pesticide treatments itself, yielded. 7-8% reduction in a/b values as compared to non-treated tomatoes. The reduction rates were found ca. 4% with ozone washes. Vitamin C reductions were found as 3-11% in pesticide treated tomatoes and washes with water or ozonated water had no significantly different effect on vitamine C losses. It was assumed that high water solubility of vitamin C is major factor on vitamin C losses as compared to oxidative effects of ozone. The findings shows that an efficient washing is most important factor on the removal of pesticides, especially with high water solubility. Ozonation is beneficial on pesticide removal in low-water solubility pesticides such as in lambda-cyhalothrin studied in this work.