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Toxicity to terrestrial arthropods

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Description of key information

The key study shows no effects on populations of T. pyri in field test at application rates of sulfur of 1400-1900 g/ha. 

Key value for chemical safety assessment

Additional information

A field test study is available for assessment of the effect of sulfur on terrestrial arthropods (BASF, 1988). As in general field test studies are better in simulating the natural processes, this study is considered the key study. The effect of sulfur on Typhlodromus pyri was evaluated in 3 municipality tests and 6 BASF-tests in wine growing areas (non-GLP study according to BBA guideline 23 -2.3.4). The exposure duration was 60 days. Sulfur had no effects on populations of Typhlodromus pyri at application rates of 1400 -1900 g/ha.

There are three supporting laboratory studies which showed the following results:

The 7-day ER50 (effective rate where 50% of the study population showed effects to reproduction) was of Trichogramma cacoeciae is 197.57 g/ha (GAB Biotechnologie GmbH & IFU Umweltanalytik GmbH 2003b).

The 7-day LR50 (lethality rate where 50% of the study population died) of Typhlodromus pyri is 10000 g/ha for mortality (Institute für Biologische Analytik und Consulting IBACON GmbH 2005f).

The 48-hour LR50 of Aphidius rhopalosiphi is 24860 g/ha (GAB Biotechnologie GmbH & IFU Umweltanalytik GmbH 2003a).

The 12 -day NOEC for reproduction of Aphidius rhopalosiphi is 25200 g/ha (GAB Biotechnologie GmbH & IFU Umweltanalytik GmbH 2003a).