Movement breakdown and persistence of carbofuran in rice field microcosm

Rosli bin Mohamad, . and Juzu Hayati Arshad, . and Ismail Abdul Rahman, . Movement breakdown and persistence of carbofuran in rice field microcosm. pp. 27-37. ISSN 0127-6883

Movement breakdown and persistence of 14C-carbofuran in rice field microcosm were studied using radioisotope technique. The level of carbofuran in the water declined rapidly within a short period after its application. About 80 of the total carbofuran applied was lost within 14 days after application (DAA). Correspondingly an increase representing about 70 of the total applied was recorded in soil within 21 DAA with higher levels appearing in the upper 5 cm layer and lesser amounts in the lower layers. Most of the residues remained bound to soil particles. Bound residues in soil increased with time and reversely extractable residues decreased build-up of carbofuran at 28 DAT. Initially at 28 days after transplanting accumulation of residues occurred in the aerial parts of plants but after 7 DAA accumulation was more pronounced in the root region. In dehusked rice grain some residues were detected only at 90 DAA. All the fish died within 24 h after carbofuran application. Toxic metabolites of 3-keto and/or 3-hydroxy carbofuran were detectable in the water. Only carbofuran phenol and 3-hydroxy carbofuran were found in the soil and rice plant respectively.

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Abstract

Movement breakdown and persistence of 14C-carbofuran in rice field microcosm were studied using radioisotope technique. The level of carbofuran in the water declined rapidly within a short period after its application. About 80 of the total carbofuran applied was lost within 14 days after application (DAA). Correspondingly an increase representing about 70 of the total applied was recorded in soil within 21 DAA with higher levels appearing in the upper 5 cm layer and lesser amounts in the lower layers. Most of the residues remained bound to soil particles. Bound residues in soil increased with time and reversely extractable residues decreased build-up of carbofuran at 28 DAT. Initially at 28 days after transplanting accumulation of residues occurred in the aerial parts of plants but after 7 DAA accumulation was more pronounced in the root region. In dehusked rice grain some residues were detected only at 90 DAA. All the fish died within 24 h after carbofuran application. Toxic metabolites of 3-keto and/or 3-hydroxy carbofuran were detectable in the water. Only carbofuran phenol and 3-hydroxy carbofuran were found in the soil and rice plant respectively.

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Item Type:	Article
Additional Information:	2 graphs; 5 tables; 24 ref. Summary (En Malay)
AGROVOC Term:	ORYZA SATIVA
AGROVOC Term:	CARBOFURANO
AGROVOC Term:	RESIDUOS/ EFECTOS RESIDUALES
AGROVOC Term:	RADIOISOTOPOS
AGROVOC Term:	SUELO
AGROVOC Term:	AGUA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:55
URI:	http://webagris.upm.edu.my/id/eprint/20059

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