Study effects of Endosulfan, Mancozeb and Pirimicarb Pesticides on Agronomic Characteristics of Tomato (Lycopersicum esculentum)

Abstract

In the present studies, the effects of some pesticides, e.g., endosulfan, mancozeb and pirimicarb on yield and their residues in tomato is reported. According to the results, yield, stem length and number of safe plants and fruits per plant were significantly different at the 1% level. The studies with no pesticide treatments revealed significant decrements. These differences were not significantly different between pesticide treated treatments. According to results, the pirimicarb residue in tomato fruits, seven days after the last sprays, in 1/2 recommended dose and control were lower than the accepted doses announced by Codex. Therefore, for pirimicarb at the current conditions a currency time more than the recommended 7 days should be defined. The residue of endosulfan and mancozeb in all treatments, except the untreated controls, were more than those announced by Codex. Considering the adverse ecological effects of pesticides, it is seen that with half the recommended doses of these pesticides acceptable effects were detected on yield and factors affecting yield such as: number of safe plants and fruits and stem length and statistically equal yields were obtained. In conclusion, it is recommended to harvest fruits longer than the time claimed by companies.