Evaluation of the performance of a castor-oil based formulation in limiting pesticide residues in strawberry crops

A study was made to evaluate the effect of a castor oil-based detergent on strawberry crops treated with different classes of pesticides, namely deltamethrin, folpet, tebuconazole, abamectin and mancozeb, in a controlled environment. Experimental crops of greenhouse strawberries were cultivated in five different ways with control groups using pesticides and castor oil-based detergent. The results showed that the group 2, which was treated with castor oil-based detergent, presented the lowest amount of pesticide residues and the highest quality of fruit produced

Método multirresíduo para monitoramento de contaminação ambiental de pesticidas na região de Bauru (SP) usando mel como bio-indicador

The presence of residues of the major groups of pesticides (organohalogen, organophosphorous, pyrethroids and organonitrogen) in representative samples of honey produced in Bauru (state of São Paulo, Brazil) was investigated from 1999 through2004. A multiresidue method was applied to honey samples to determine 48 pesticides with recoveries ranging from 76 to 95%. The limits of detection found were lower than 10 µg/kg for GC-MS-SIM. The results indicated that most pesticides found in the samples belonged to the organohalogen and organonitrogen groups. Residues of malathion were detected in almost all of the samples in high concentration

Método multirresíduo para monitoramento de contaminação ambiental de pesticidas na região de Bauru (SP) usando mel como bio-indicador

The presence of residues of the major groups of pesticides (organohalogen, organophosphorous, pyrethroids and organonitrogen) in representative samples of honey produced in Bauru (state of São Paulo, Brazil) was investigated from 1999 through2004. A multiresidue method was applied to honey samples to determine 48 pesticides with recoveries ranging from 76 to 95%. The limits of detection found were lower than 10 µg/kg for GC-MS-SIM. The results indicated that most pesticides found in the samples belonged to the organohalogen and organonitrogen groups. Residues of malathion were detected in almost all of the samples in high concentration

Atividade biológica de extratos, hidrolatos e óleos voláteis de pau-rosa (Aniba duckei Kostermans) e quantificaç ão do linalol no hidrolato de folhas

The objective of this study was to evaluate the bioactivity of extracts and by-products of volatile oil extraction from rosewood, as well as to quantify linalool levels in hydrolates. Branch and trunkwood methanol extracts presented significant lethality to Artemia franciscana larvae (LC 50 58 ± 33 and 71 ± 31 mg mL -1, respectively). Hydrolates (diluted to 25%) and volatile oil (2 mg mL -1) caused 100% mortality. These results show that A. duckei is a potential source of cytotoxic substances. The volatile oil obtained from branchwood presented larvicidal activity in vitro towards Aedes aegypti (hemorrhagic dengue fever vector, LC 50 2,2 g L -1). Quantitative GC analysis performed on the hydrolate obtained from leaf extraction revealed a linalool concentration of 0.09% v/v (6 mM), which could be responsible for the observed bioactivity