Search Result of "Md. Wasim Aktar"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Risk Assessment and Degradation of an Insecticide (Chlorpyriphos): A Decontamination Study under Different Culinary Processes in/on Cabbage)

ผู้เขียน:ImgMd. Wasim Aktar, ImgDwaipayan Sengupta, ImgMariappan Paramasivam, ImgAshim Chowdhury

สื่อสิ่งพิมพ์:pdf

Abstract

Chlorpyriphos 20 EC was applied at the rate of 500 g ai. ha-1 to cabbage heads and the samples harvested at intervals of 0 (2 hours after application), 1 and 7 days after application. The calculated half-life value and safe waiting period (8.75 and 45.29 days, respectively) indicated its persistence. Thus, to reduce the safe waiting period, efforts were made to decontaminate the chlorpyriphos residue from the cabbage head by various household preparations (viz. washing, cooking, washing plus cooking, salt water dipping, dipping in boiled salt water, dipping in detergent solution and dipping in boiled detergent solution). Statistical analysis of the data using Duncan’s multiple range test revealed that various household processing treatments substantially reduced the residue of chlorpyriphos in cabbage heads by a range of 27.89-73.32% but none were able to satisfactorily reduce the residue to below the tolerance level of 0.05 mg kg-1.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 043, Issue 2, Apr 09 - Jun 09, Page 231 - 238 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Persistence and Dissipation of Propineb-A Dithiocarbamate Fungicide in Potato under East-Indian Climatic Conditions)

ผู้เขียน:ImgMd. Wasim Aktar, ImgM. Paramasivam, ImgDwaipayan Sengupta

สื่อสิ่งพิมพ์:pdf

Abstract

A two season study (Season-I: October, 2005 January, 2006 and Season-II: October, 2006 January, 2007) on the persistence of propineb (Propineb? 70% WP) was undertaken with potatoes at two different locations having two different types of soil: new alluvial and old alluvial, respectively. Two dosage rates were applied: 2.5 and 5.0 kg ai ha-1 twice with a 15-day interval. More than 94% of the initial residues of propineb in the potato tubers dissipated within 15 days after application irrespective of dose, season and location. The residue was detectable up to 20 days after the last application of the fungicide. Assuming first order kinetics, the half-life values varied from 2.59 to 3.48 days. A safe waiting period of 10 days is recommended for potatoes.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 043, Issue 1, Jan 09 - Mar 09, Page 50 - 55 |  PDF |  Page