Variation of cypermethrin residue levels in selected tropical fruit samples within and among field trials

Ngan Chai Keong, . and Khairatul Azmah Mohamed, . and Mohammad Shahid Shahrun, . and Ismail Sahid, . Variation of cypermethrin residue levels in selected tropical fruit samples within and among field trials. pp. 191-198. ISSN 1394-9829

A comparison of pesticide residue data from field trials of three sampling methods was done to assess the variability of cypermethrin residue levels in terms of within the field trial and among between field trials. The fruit (mango/ papaya) samples were collected on individual tree basis (Study A: within field trial) on subplot basis (Study B: within field trial) and whole plot basis (Study C: among field trials). The field trials were conducted from 2006 “ 2009. In Study A and B replicate analysis yielded smaller measurement variation compared to sample replicates. Measurement of variation was highest (Relative Standard Deviations RSD 50.7) among field trial samples (Study C) followed by samples from Study A (RSD 28.9) and Study B (RSD 15.8). The RSD of replicate samples were higher than the RSD of the analysis of replicates in Study A and B. The contributors of uncertainty to the measurement of cypermethrin residue in descending order based on percentage variance were: sampling (82.2 “ 95.6) followed by sample processing (2.6 “ 11.5) and analysis (1.7 “ 6.3). The field factor was a significant contributor to the variation in pesticide residue measurement as compared to the laboratory factor.

Full text available from: Official URL: http://ejtafs.mardi.gov.my/jtafs/42-2/Tropical%20f...

Abstract

A comparison of pesticide residue data from field trials of three sampling methods was done to assess the variability of cypermethrin residue levels in terms of within the field trial and among between field trials. The fruit (mango/ papaya) samples were collected on individual tree basis (Study A: within field trial) on subplot basis (Study B: within field trial) and whole plot basis (Study C: among field trials). The field trials were conducted from 2006 “ 2009. In Study A and B replicate analysis yielded smaller measurement variation compared to sample replicates. Measurement of variation was highest (Relative Standard Deviations RSD 50.7) among field trial samples (Study C) followed by samples from Study A (RSD 28.9) and Study B (RSD 15.8). The RSD of replicate samples were higher than the RSD of the analysis of replicates in Study A and B. The contributors of uncertainty to the measurement of cypermethrin residue in descending order based on percentage variance were: sampling (82.2 “ 95.6) followed by sample processing (2.6 “ 11.5) and analysis (1.7 “ 6.3). The field factor was a significant contributor to the variation in pesticide residue measurement as compared to the laboratory factor.

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Item Type:	Article
AGROVOC Term:	Cypermethrin
AGROVOC Term:	Residues
AGROVOC Term:	Tropical fruits
AGROVOC Term:	Field trials
AGROVOC Term:	Pesticide residues
AGROVOC Term:	Pesticides
AGROVOC Term:	Mangoes
AGROVOC Term:	Papayas
AGROVOC Term:	Yields
AGROVOC Term:	Measurement
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24448

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