Determination of Organophosphate and Carbamate Pesticide Residue in Registered Vegetables of Nonthaburi Provincial Agricultural Extension Office

Abstract

The objectives of this research were 1) to analyze the determination of organophosphate and carbamate pesticide residues in registered vegetables from Nonthaburi Provincial Agricultural Extension Office. 2) To study the relationship between organophosphate and carbamate pesticide residues with the types of registered vegetable, the registration district and the vegetable garden. This experimental research was performed by organophosphate and carbamate pesticide residue determination in 5 types of registered vegetable; sweet basil, holy basil, kale, lettuce and yard long bean for a total number of 90 samples (18 samples for each type) along with the test by "GT" Pesticide Test Kit. Statistical data analysis was obtained by Chi-Square Test (X^2). The findings showed that 1) lettuce was found to have the highest number with the unsafe level of pesticide residue, followed by kale and sweet basil. Yard long bean was found to have pesticide residue at the safe level, while holy basil and sweet basil were found to have no pesticide residues. The relationship between the types of vegetable and pesticide residues was statistically significant at the level of 0.05 (X^2 = 36.385, Sig = .000), 2) among the registered districts in Nonthaburi, pesticide residues in the vegetables from district A and district B were determined in the safe level. However, it was found that the registered district was not significantly related to the pesticide residues, (X^2 = 3.696, Sig = .158) and 3) regarding the vegetable garden, vegetables from the other pattern (groove type) were found to have the pesticide residues at unsafe level. In contrast, the pesticide residues of the vegetables from the long and square garden types were found with the safe level. The vegetable garden demonstrated the significant relationship with pesticide residues at the level of 0.05 (X^2 = 10.333, Sig = .035). In summary, the determination of organophosphate and carbamate pesticide residues in the registered vegetables from Nonthaburi Provincial Agricultural Extension Office were significantly related to the type of vegetable and vegetable garden, while the registered district showed no relationship with the pesticide residues.