Screening for suitable chemical acaricides against two-spotted spider mites, Tetranychus urticae, on greenhouse strawberries in China.
Ecotoxicol Environ Saf
; 163: 63-68, 2018 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-30036758
ABSTRACT
Effective and safe acaricides based on scientific data are needed for that no chemical acaricides has been registered for the control of two-spotted spider mite in strawberry crops in China. To identify suitable acaricides, the efficacy, persistence, and toxicity of eight acaricides (hexythiazox, fenpyroximate, chlorfenapyr, propargite, etoxazole, bifenazate, spirodiclofen, and pyridaben) on greenhouse strawberries were tested. The eight acaricides were ranked, from highest average efficacy at the recommended dosage to lowest, as follows etoxazole >â¯bifenazate >â¯fenpyroximate >â¯propargite >â¯spirodiclofen >â¯pyridaben >â¯hexythiazox>â¯chlorfenapyr. The average recoveries of the eight acaricides at the spiking levels of 0.05 and 0.5â¯mg/L ranged from 72.4% to 108.1% (relative standard deviation, 1.3-8.8%). The concentrations of hexythiazox, fenpyroximate, etoxazole, bifenazate, spirodiclofen, and pyridaben at 5 days after application were lower than the maximum residue limits (MRLs) specified by China, the European Union (EU), the Codex Alimentarius Commission, and Japan, but those of chlorfenapyr and propargite residues were 8.8 and 1.9 times higher than the MRLs in the EU. Only propargite posed a high chronic dietary risk to humans. Pyridaben and chlorfenapyr showed unacceptable ecotoxicology risks for honeybees (hazard quotient values of >â¯50). The recommended acaricides to control spider mites in greenhouse-grown strawberry crops are etoxazole, bifenazate, fenpyroximate, spirodiclofen, and hexythiazox based on the efficacy, persistence and toxicity.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Contaminação de Alimentos
/
Tetranychidae
/
Fragaria
/
Acaricidas
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Risk_factors_studies
/
Screening_studies
Limite:
Adult
/
Animals
/
Humans
País/Região como assunto:
Asia
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Ano de publicação:
2018
Tipo de documento:
Article