Effect of different formulations on tebuconazole residues in stone fruits.
BACKGROUND
The correlation between pesticide residue levels and formulation of an active substance is often not considered, even if it is reasonable to expect some differences arising from behaviour during dilution and spraying, from adhesion to plant and from degradation. An experimental study to investigate the magnitude of tebuconazole residues as a function of different tebuconazole formulated products was carried out in Italy. The fungicide was applied as wettable powder (WP) and water-dispersible granule (WG) formulations to peach, plum, apricot and nectarine orchards, on four different sites. The fruit samples gained from the field trials were quantitatively analysed by gas chromatography with a nitrogen phosphorus detector (GC/NPD) for tebuconazole residues.


RESULTS
Tebuconazole residues in the fruits gained from the plot treated with the WP formulation, 14 days after application, were in the range 0.01-0.07 mg kg(-1), while corresponding residues in the plot treated with the WG formulation were in the range 0.01-0.06 mg kg(-1).


CONCLUSIONS
No significant differences in the residue levels of tebuconazole could be observed between the trials conducted with the WP and the WG formulation.
Lucini
Luigi
L
Università Cattolica del Sacro Cuore, Environmental and Agricultural Chemistry, Section of Soil Science, Via Emilia Parmense 84, Piacenza 29100, Italy. luigi.lucini@unicatt.it
Molinari
Gian Pietro
GP
D005638:Fruit / Q000737:chemistry*; D005659:Fungicides, Industrial / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D027861:Prunus / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
D005659:Fungicides, Industrial; D010573:Pesticide Residues; D014230:Triazoles; C087114:tebuconazole