Naslov
Crop sensitivity to mesotrione residues in two soils: field and laboratory bioassay

Autori
Pintar, Ana ; Stipičević, Sanja ; Svečnjak, Zlatko ; Barić, Klara ; Lakić, Josip ; Sraka, Mario

Izvornik
Chilean Journal of Agricultural Research (0718-5839) 80 (2020), 4; 496-504

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
field pea ; fluvisol ; gleysol ; phytotoxicity ; sugar beet

Sažetak
Herbicide residues can potentially injure sensitive crops grown in rotation. Thus, the objective of this study was to evaluate the sensitivity of six replacement crops to mesotrione residues the year after herbicide application. In field bioassay, mesotrione was applied at recommended (144 g ai ha-1), twofold (288 g ai ha-1), and fourfold (576 g ai ha-1) rates at two soil types (Gleysol and Fluvisol). In field and laboratory bioassay, mesotrione residual activity was followed for a 21-d period using various measurements of phytotoxicity. No visual injuries to mesotrione residues were observed on oat (Avena sativa L.), rapeseed (Brassica napus L.), soybean (Glycine max L. Merr.) and sunflower (Helianthus annuus L.) in the field bioassay. Although mesotrione residues were not detected by HPLC-UV/DAD analysis, field bioassays indicated their presence due to visible injuries on field pea (Pisum sativum L.) grown in Gleysol soil with twofold and fourfold herbicide treatments. In contrast to other test crop responses, sugar beet exhibited visible injuries in both soils, and consequently, was subjected to laboratory bioassay. With increasing mesotrione rates, the reductions in sugar beet (Beta vulgaris L. var. saccharifera Alef.) fresh weight and total carotenoids content ranged from 6.2% to 18.7% and from 4.1% to 19.4% in Gleysol, and from 1.1% to 7.7% and from 0% to 11.9% in Fluvisol, respectively. Since herbicide residues could not often be detected by instrumental analysis, the bioassays seem to be a reliable tool for crop safety assessment.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Poljoprivreda (agronomija)

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