Pesticide Residues in Heterogeneous Plant Populations, a Model-Based Approach Applied to Nematicides in Banana (Musa spp.)

• Published in: Journal of agricultural and food chemistry Vol. 55; no. 6; pp. 2504 - 2508
• Main Authors: Tixier, Philippe, Chabrier, Christian, Malézieux, Eric
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 21.03.2007
• Subjects: Antinematodal Agents - analysis; application timing; bananas; Biological and medical sciences; developmental stages; food contamination; Food Contamination - analysis; Food engineering; Food industries; food safety; fosthiazate; Fruit - chemistry; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; General aspects; Hygiene and safety; Life Sciences; Musa; Musa - chemistry; nematicides; Organophosphorus Compounds - analysis; pesticide application; pesticide residues; Pesticide Residues - analysis; phenology; Plants, Edible - chemistry; population structure; preharvest interval; SIMBA-POP model; simulation models; Thiazolidines - analysis; Bass; Monocotyledones; Fruit; preharvest interval; SIMBA; Pesticides; Nematicide residues; Musaceae; fosthiazate; Banana; agricultural products safety; Musa spp; Musa; consumer exposure to pesticides; Consumer; Residue; Angiospermae; Agricultural product; population model; Spermatophyta; Models; Safety; CONSUMER EXPOSURE TO PESTICIDES; POPULATION MODEL; PRODUCTS SAFETY; NEMATICIDE RESIDUES; intervalle avant récolte; FOSTHIAZATE; MUSA SPP; BANANA; PREHARVEST INTERVAL; exposition du consommateur aux pesticides; BANANIER
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf062710f

Nematicides are widely used to control plant-parasitic nematodes in intensive export banana (Musa spp.) cropping systems. Data show that the concentration of fosthiazate in banana fruits varies from zero to 0.035 g kg-1, under the maximal residue limit (MRL = 0.05 mg kg-1). The fosthiazate concentration in fruit is described by a Gaussian envelope curve function of the interval between pesticide application and fruit harvest (preharvest interval). The heterogeneity of phenological stages in a banana population increases over time, and thus the preharvest interval of fruits harvested after a pesticide application varies over time. A phenological model was used to simulate the long-term harvest dynamics of banana at field scale. Simulations show that the mean fosthiazate concentration in fruits varies according to nematicide application program, climate (temperature), and planting date of the banana field. This method is used to assess the percentage of harvested bunches that exceed a residue threshold and to help farmers minimize fosthiazate residues in bananas. Keywords: Nematicide residues; fosthiazate; banana; Musa spp.; SIMBA; population model; preharvest interval; agricultural products safety; consumer exposure to pesticides