Nematicidal Effects of Carbofuran and GC-MS Analysis of its Residue inudPineapple Fruits

摘要

Concerns over the safety of food items from fields treated with nematicides had risen in recent times. In this study, two fieldudexperiments arranged in a Randomized Complete Block Design were conducted to assess the efficacy of poultry manure andudcarbofuran in suppressing nematode population and determine the residual presence of the nematicide in pineapple fruits.udThree poultry manure rates (0, 20 and 25 metric tonnes per hectare) and carbofuran treatments (0, 3.0 kg a.i/ha and 3.4 kguda.i/ha) were applied to two naturally infested pineapple fields. Twenty core soil samples per plot were collected from plantsudrhizosphere at 3, 6, 9, 12, 15 and 18 months after planting. Fifty grams each of chopped pineapple samples from theudcarbofuran-treated and untreated plots was extracted with 20ml of ethyl acetate solution for fruit analysis to determine theudresidual presence of carbofuran using Gas Chromatography-Mass Spectrometry (GC-MS). The study indicated that poultryudmanure and carbofuran significantly (P� 0.05) suppressed nematode population in both locations and promoted crop yield.udThe GC-MS test showed that carbofuran and its metabolites were not detected in the pineapple fruits, suggesting thatudcarbofuran is not likely to constitute dietary risks to consumers of fruits from treated plots. © 2015 Friends Science Publishers