Distribution of chlorpyrifos residue in maize (Zea mays)

Abstract

Chlorpyrifos is an organophosphate insecticide. It has low aqueous solubility, is volatile and non-mobile, moderately persistent in soil, highly toxic to mammals, and is an acetylcholinesterase inhibitor. The main use of chlorpyrifos is to control various types of agricultural pests. This study aims to determine the absorption of chlorpyrifos residues in maize plants. The study was conducted in July-December 2019. Experimental research was conducted at Jakenan experimental field on land contaminated with chlorpyrifos residue. The maize used was a hybrid maize variety NK 6172 Perkasa. Pesticide residue analysis was carried out at the Laboratory of the Agricultural Environmental Research Institute (IAERI). The results showed that the highest chlorpyrifos residue was in the stalks and leaf with a value of 0.0318-0.5682 mg kg−1 but still below the maximum residue limit (MRL) of 10 mg kg−1 recommended by The National Standardization Agency of Indonesia. The concentration of chlorpyriphos residue in maize grain is 0.0014-0.2203 mg kg−1 (MRL=0.05 mg kg−1). Chlorpyriphos residue in the soil is 0.0148-0.0786 mg kg−1 (MRL=3.2 mg kg−1), and the lowest was root (<0.0014 mg kg−1). Information on residue distribution on maize and soils can be helpful as an early warning about the use of insecticides and food safety measures.