Detection of Diazinon Residue in Honey and Honey Bee (Apis mellifera) in Bandar-Abbas and Meshkinshahr, Iran

Background: The excessive use of pesticides for crops by farmers, their destructive effects on beneficial organisms, such as bees, have become a big problem today. This study was designed to find out if the honey bee (Apis mellifera) and the honey be affected by diazinon. Methods: Six hives were purchased, 3 hives in Bandar-Abbas and remaining were considered for Meshkinshahr. Plants around the hive were sprayed with diazinon at a concentration of 2/1000. Sampling took place 15d after spraying, and diazinon residue was measured by the HP TLC. The study was conducted in 2017–2018. Results: The amount of diazinon residue in honey and honey bee was measured and compared with existing studies. The amount of diazinon residue in honey bee was found to be 0.017mg/kg in Bandar Abbas, and 0.005mg/kg in Meshkinshahr hives. There was nothing in honey. Conclusion: Honey is safe for consumers.

Qualitative analysis of insecticide residue in cauliflower samples collected from different regions of Bangladesh

The samples of the cauliflowers were analyzed to assess the residue level of six insecticides (i.e.; cypermethrin, quinalphos, diazinon, malathion, fenitrothion and acephate) using GC-FTD and GC-ECD method. Out of analyzed 75 collected samples of cauliflower from farmer’s field of Jessore, Gazipur and Rangpur, 38.67% (29 from 75) were found to be contaminated with the insecticides. Many samples contained cypermethrin, acephate and fenitrothion residues. Quinalphos, acephate and fenitrothion were found as multiple product residues representing 13.79% (4 from 29) of the total contaminated samples and the rest 86.21% contained single insecticide residue. About 13.33% (10 of 75) of the total samples had residues exceeding the MRL (Maximum Residue Limit) irrespective of single or multiple insecticide residues. Malathion residue was found only in one sample from Jessore. Two samples showed diazinon residue one from Jessore and the other one from Rangpur location. The detected residue levels of both malathion and diazinon were below the MRL, which might be due to higher rate of degradation. The presence of highest residue levels of insecticides in cauliflowers may be due to its irrational and repeated use before harvest. Asian Australas. J. Food Saf. Secur. 2018, 2(1), 29-34