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1.
Braz. arch. biol. technol ; 55(4): 631-636, July-Aug. 2012. tab
Article in English | LILACS | ID: lil-645417

ABSTRACT

An environmental impact study was conducted to determine the Piracicamirim's creek water quality in order to assess the influence of effluents from a sugar industry in this water body. For this, toxicity tests were performed with a water sample upstream and downstream the industry using the microcrustaceans Daphnia magna, Ceriodaphnia dubia and Ceriodaphnia silvestrii as test organisms, as well as physical and chemical analysis of water. Results showed that physical and chemical parameters did not change during the sampling period, except for the dissolved oxygen. No toxicity was observed for D. magna and reproduction of C. dubia and C. silvestrii in both sampling points. Thus, the industry was not negatively impacting the quality of this water body.

2.
Pesticidas ; 20(1): 29-34, jan.-dez. 2010. tab, graf
Article in Portuguese | LILACS | ID: lil-587604

ABSTRACT

A preocupação com as questões ambientais tem levado ao crescimento de pesquisas relacionadas aos compostos com potencial no controle de pragas na agricultura, direcionando alternativas que minimizem os impactos ao ambiente. Nesse sentido acredita-se que a utilização de produtos proveniente de plantas possa representar opção eficaz para o controle de pragas com menor risco ambiental.Objetivou-se com este trabalho avaliar a toxicidade aguda e crônica de uma formulação comercial de nim para Ceriodaphnia dubia. A CE50 (48h) determinada foi de 0,032 mL·L-1, e os valores de CENO, CEO e VC foram respectivamente em mL·L-1:0,004; 0,008 e 0,006. Os testes de toxicidade mostraram efeitos do produto tanto na mobilidade como na reprodução de C. dubia.


Subject(s)
Toxicity Tests, Acute , Toxicity Tests, Chronic , Environment , Environmental Hazards , Pest Control
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