Sec-butylamine residues in citrus, pome fruits and bananas from post-harvest treatments

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Abstract
Sec-butylamine residues were determined for post-harvest treatments for control of citrus green and blue mold (Penicillium digitatum Sacc. and P. italicum Wehmer), blue mold of pome fruits (P. expansum Thom.) and black-end (Colletotrichum musae (Berk and Curt.) Arx) and squirter (Nigrospora sphaerica Sacc.) of banana fruits. Residues in citrus fruit (orange, tangor, mandarin, grapefruit and lemon) ranged from 0.88-7.65 .mu.g g-1 and were well within the 30 .mu.g g-1 recommended limit of the Joint FAO/WHO Meeting of Experts on Pesticide Residues and the Australian National Health and Medical Research Council. The single bulk dip gave 2-3 .times. higher residues than the combined dip and flood treatment. Pome fruit residues ranged from 2.75-11.6 .mu.g g-1, with pears (11.2-11.6 .mu.g g-1) having 3-4 .times. higher residues than apples (2.75-3.61 .mu.g g-1). Whole green or ripened Cavendish bananas contained residues ranging from 15.1-27.6 .mu.g g-1, with 2% or less of the residue being found in the pulp. The dipped, boxed single fruits had almost double the residues of flooded hands.

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