Publications by authors named "Ignacio de Alfonso"
Article Synopsis
- Herbivore natural enemies, like the predatory bug Orius laevigatus, use plant odors and herbivore cues to find food, with a focus on the role of plant-inhabiting pests' chemical signals.
- The research examines how O. laevigatus reacts to specific components of the thrips' aggregation pheromone, namely (R)-lavandulyl acetate and neryl (S)-2-methylbutanoate, in various mixtures.
- Findings reveal that while these compounds alone do not attract the predatory bugs, a specific blend (1:2.3 ratio) does, indicating that these pheromone components could be effective attractants for better pest management strategies.
Role of α-copaene in the susceptibility of olive fruits to Bactrocera oleae (Rossi).
J Agric Food Chem
December 2014
The influence of α-copaene as a fruit volatile in the susceptibility of Olea europaea L. to the olive fruit fly Bactrocera oleae (Rossi) has been investigated. By studies on the relative area of volatile components from different cultivars, a positive correlation was found between the abundance of α-copaene in the samples and the corresponding degree of fruit infestation.
View Article and Find Full Text PDFStudies about the sex pheromone of the mealybug Dysmicoccus grassii , a main pest of Canary Islands banana cultivars, showed strong evidence that (-)-(R)-lavandulyl propionate and acetate in a 6:1 ratio are principal components of it. Volatile collection and GC-MS analysis from aeration of virgin females allowed the structural elucidation of the compounds. The activity and stereochemistry of both substances were established by means of relative attraction of mealybug males to synthetic standards in competitive Petri dish bioassays.
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- The study presents a synthetic method for creating isospongian diterpenes using (S)-carvone as a building block for the C-ring.
- This technique involves a series of chemical reactions, including intramolecular Diels-Alder and ring-closing metathesis, to form the complex tetracyclic structure.
- Preliminary tests showed that many of the synthesized isospongians effectively inhibit the NADH oxidase activity of the mammalian mitochondrial respiratory chain at micromolar concentrations.
The commercially available monoterpene carvone has been efficiently converted into the tricyclo[3.2.1.
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