Publications by authors named "Adalberto H Sousa"
Article Synopsis
- Essential oils, particularly from C. DC. (sin. Sw.), were studied for their potential to protect stored grains from insect infestation through fumigation and contact methods.
- The research assessed how different concentrations of the essential oil affected insect mortality, progeny rates, and the quality of stored cowpeas over varying periods.
- Safrole was identified as the main compound in the oil, and it showed significant insecticidal effects while maintaining the quality of the cowpeas even at lower concentrations.
This study aimed to evaluate the toxicity of essential oil (PHEO) against 11 Brazilian populations of (Coleoptera: Curculionidae). The effects of sublethal doses of PHEO on the behavior (walking and flying), respiration, and population growth () of the insect populations were investigated. PHEO toxicity was determined through concentration-mortality bioassays, with mortality curves established using increasing PHEO concentrations ranging from 140.
View Article and Find Full Text PDFMethod Validation and Evaluation of Safrole Persistence in Cowpea Beans Using Headspace Solid-Phase Microextraction and Gas Chromatography.
Molecules
November 2021
Bioinsecticides are regarded as important alternatives for controlling agricultural pests. However, few studies have determined the persistence of these compounds in stored grains. This study aimed at optimizing and validating a fast and effective method for extraction and quantification of residues of safrole (the main component of essential oil) in cowpea beans.
View Article and Find Full Text PDFGiven the insecticidal potential of eugenol as a fumigant, this work aimed to determine the diffusion coefficient of eugenol emanating from a pure standard solution (99%), as well as from clove essential oil (Eugenia caryophillata Thunb. (Myrtaceae)) through rice grain; to chemically analyse the volatile composition of commercially available eugenol and clove essential oil; and to evaluate the mortality of Sitophilus zeamais Motschulsky (Coleoptera: curculionidae) after exposure to eugenol inside a test chamber filled with rice. The solid phase microextraction method of extracting and quantifying eugenol by gas chromatography presented a good analytical response for the quantification of the analyte.
View Article and Find Full Text PDFThe knowledge on ovigeny in parasitoids is important for basic studies on physiology and applied biological control. The ovigeny pattern and type of ovariole of the parasitoid Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) were studied in newly-emerged females at seven, 14, 24 and 48 h intervals after their emergence from Tenebrio molitor L. pupae (Coleoptera: Tenebrionidae).
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