Impact of Certain Insecticides on Chemical Composition of Greenhouse and Open Field Tomato Plants

Document Type : Original Article

Author

Department of Arid land Agriculture, College of Agricultural Food Sciences, King Faisal University, P.O.Box. 420, Al-Hassa 31982, Saudi Arabia

Abstract

The impact of four insecticides; pirimiphos-methyl, chlorpyrifos-ethyl, cypermethrin and fenvalerate, on the chemical composition of greenhouse and open field tomato were evaluated. Insecticides were applied at recommended rates that used to control the insect pests. Data of moisture and ash contents revealed no significant differences between the greenhouse treated and untreated plants. However, dramatic effects were observed between treated and untreated open field plants in which slight increase or decrease were recorded. Carbohydrate contents were significantly decreased in all insecticide treatments when compared with control in greenhouse. However, slight increase of carbohydrate contents was recorded in open field treated plants compared with the control. Moreover, data showed slight reduction of phosphorus and nitrogen contents in most of the insecticide treatments either in greenhouse or in open field plants. In the case of trace elements data showed an increase of iron, zinc and copper contents in greenhouse treated plants and reduction of manganese, zinc and Copper in open field treated plants. However, dramatic effects were observed in the case of iron in open field and manganese in greenhouse treated plants. In conclusion, the impact of insecticides on chemical composition of tomato plants might depend on the environmental factors and the chemical structure of insecticide.

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