اندازه گیری باقیمتنده و دوره کارنس آفت کش کاربایل بر روی محصول کاهو در ایران

Lettuce is a very useful vegetable with effective therapeutic properties and its usage has ancient history among vegetables, it is usually consumed freshly and raw. Therefore, monitoring of pesticide residue in lettuce improve safety of food basket. The most important pests of lettuces and leafy vegetables are larvae can, cream crown and snail. Lettuces are sprayed by pesticides such as chlorpyrifos, dimethoat, deltametrin and carbaryl. Lettuces are sprayed 2-3 times depending on region and type of pesticides. Carbaryl is recommended for lettuces and leafy vegetables by plant protection organization. In this study, carbaryl pre-harvest interval and its residue in lettuce were determined in Tehran (Varamin) and Khuzestan provinces (because there are many large fields of lettuce in these regions). Once carbaryl was extracted from the samples, they were separated by high-performance liquid chromatography (HPLC), detected with UV detector and compared with standard peaks of carbaryl. Finally, pre-harvest interval for lettuce is determined 3.44 days after latest spray in comparison with national Maximum Residue Limits (MRL) for Varamin and 3.48 days for Khuzestan so preharvest interval for carbaryl on lettuce could be proposed 4 days.

Keywords:

کارباریل , حشره کش ها , کاهوها , باقیمانده ها , کنترل آفت