 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Cypermethrin Insecticide Residues in Vegetable Soybean, Glycine max (L.) Merrill, at Different Days of Pre-harvest Interval) ผู้เขียน: Md. Abdullah, Ouab Sarnthoy,  ดร.สุรัตน์วดี จิวะจินดา สื่อสิ่งพิมพ์:pdf AbstractThe experiments were conducted to investigate cypermethrin insecticide residues in vegetable soybean at different days of pre-harvest interval for two growing seasons. Soybean pods were collected at 0, 1, 3, 5 and 10 days after last application with cypermethrin. Residues were extracted from pods and determined using gas liquid chromatography with an electron capture detector. Cypermethrin when applied at the rate of 100 g ai/ha using a knapsack sprayer showed a mean residue level of 0.71 and 0.52 mg/kg at 0 and 1 day, respectively, in dry season (December- February) whereas the residues were 1.62 and 1.17 mg/ kg at 0 and 1 day, respectively, in early wet season (April-June). A pre-harvest interval of 3 days was found safe (0.42 mg/kg) for consumers in dry season whereas early wet st season soybean exhibited residue level of 0.48 mg/kg at 10 day which fell below maximum residue limit of 0.5 mg/kg as prescribed by Food and Agriculture Organization/World Health Organization. Therefore, a pre-harvest interval of 10 days should be considered for cypermethrin residues in vegetable soybean to avoid any health risk of consumers. The dissipation rates of cypermethrin on soybean pods were more or less similar at the same days for both seasons which was 70% (based on 0 day) at 10 days. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Insecticide Residues in Mushroom) ผู้เขียน:ดร.พัฒนา อนุรักษ์พงศธร, รองศาสตราจารย์ , Chongrak Keawprasit, Nusara Sinbuatong, Benja Chutintrasri สื่อสิ่งพิมพ์:pdf AbstractMushroom samples were randomly collected from markets in Bangkok area. The investingation of insecticidal residues in mushroom was found that the abalone mushroom (Pleurotus Cystidious) and oyster mushroom (Pleurotus ostreatus) contained insecticidal carbamates carbaryl. Carbaryl was used as an insecticide to get rid of mites. Organochlorine residues such as BHC, heptachlor, epoxide and dieldrin were found in straw mushroom (Volvariella volvacea). These residues are originated from residues in rice straw which was the material used in the process of straw mushroom growing. Carbaryl and organochlorine residues in this investigation were not exceeded maximum levels for residues (MRL value) in agricultural products. However, at the present MRL value of carbaryl and organochlorine residues in mushroom have not been established. |
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