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VCRB :: Contents of Volume 51/1999 :: Detailed information


THE INFLUENCE OF CULTIVAR AND GROWING METHOD ON INORGANIC BROMIDE CONTENTS IN BELL PEPPER FRUIT AFTER SOIL FUMIGATION WITH METHYL BROMIDE

Czesław ŚLUSARSKI, Janusz CZAPSKI and Józefa DOBRZAŃSKA
Research Institute of Vegetable Crops, Konstytucji 3 Maja 1/3, 96-100 Skierniewice, Poland


Summary

In a two year greenhouse experiment concentrations of inorganic bromide were determined in fruit of six pepper cultivars (Bendigo F1, Kelvin F1, Spartacus F1, Stanola F1, Zarco F1, Monica F1) grown in methyl bromide fumigated soil (80 g.m-2). In the 1994 trial, the lowest mean bromide concentration for the whole harvest period was detected in fruit ofcv. Bendigo Fi (39 mg.kg-1). In all other cultivars bromide residues were somewhat higher, ranging from 52 to 61 mg.kg-1. Also in the next year the mean bromide ion concentrations were very similar for a group of five cultivars (31-38 mg.kg-1), except for the cultivar Monica F1 in which mean Br content was 52 mg.kg-1. Varietal differentiation in accumulation of bromide ion was insignificant both years. In the 1994 trial, mean bromide concentrations detected in pepper fruit were similar throughout the harvest period. In 1995, however, bromide residues in fruit from early picking were significantly higher than those of fruit from mid picking, but they did not differ significantly from the late picking. The level of postplanting fertilization and mulching of the soil with straw had no apparent influence on bromide accumulations in pepper fruit but ring culture method reduced bromide concentrations in fruit by 50% compared to the growing directly in the fumigated soil.

keywords:bell pepper, bromide residues, fertilization, soil disinfestation, straw mulching, protected cultivation

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