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Determination of Pre Harvest Interval for Chlorpyriphos, Quinalphos and Cypermethrin in Major Vegetables

M.S. Ahmed
Senior Scientific Officer
Entomology Division, BARI, Gazipur

M.A. Rahman
Senior Scientific Officer
Entomology Division, BARI, Gazipur

M. W. Akon
Scientific Officer
Entomology Division, BARI, Gazipur

A. Begum
Scientific Officer
Entomology Division, BARI, Gazipur

Abstract/ Executive Summary:

A study was conducted to determine the pre harvest interval (PHI) for chlorpyriphos in bean, yard long bean, brinjal, tomato, cabbage and cauliflower; quinalphos in bean, tomato and cauliflower; and cypermethrin in bean, brinjal, cabbage and cauliflower depending on Maximum Residue Limit (MRL) Set by FAO/WHO. The determined PHI were 8 DAS for quinalphos in cauliflower; 7 DAS for chlorpyriphos in cabbage and cauliflower; 5 DAS for quinalphos in bean and tomato, chlorpyriphos in bean, yard long bean, brinjal and tomato; 4 DAS for cypermethrin in bean, brinjal, cabbage and cauliflower.

Keywords: PHI, chlorpyriphos, quinalphos, MRL

Location: Gazipur

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Pest Management

Commodity: Insecticide

Objectives:

To re-set the PHI for chlorpyriphos, quinalphos and cypermethrin in major vegetables.

Methodology:

The standard for chlorpyriphos, quinalphos and cypermethrin were obtained from Sigma-Aldrich Laborchemikalien, Gmbh P O Box-100262 D-30918, Seelze, Germany via Bangladesh Scientific Pvt. Ltd. Dhaka, Bangladesh. Standards of all pesticides contained 99.6% purity. Marketable size of country bean, yard long bean, brinjal, tomato, cabbage and cauliflower were collected from three different supervised field trials at 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 days after spray (DAS) which were sprayed with chliopyriphos @1.5 ml/L of water, quinalphos @ 2 ml/L of water and cypermethrin @ 1 ml/L of water. The formulated products of those were dursban 20EC, amcolux 25EC and cymbush 10EC. The purity of formulated insecticides were tested in the laboratory and found to be 100% pure.

Source of Information: Annual Report 2011-2012, Entomology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

1.	Budget: 100,000.00

Total Budget (Tk.) : 100,000.00

Achievement/Findings:

The determined PHI were 8 DAS for quinalphos in cauliflower; 7 DAS for chlorpyriphos in cabbage and cauliflower; 5 DAS for quinalphos in bean and tomato, chlorpyriphos in bean, yard long bean, brinjal and tomato; 4 DAS for cypermethrin in bean, brinjal, cabbage and cauliflower.

Knowledge Management: Report/Proceedings