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Dual Chemical Barriers Protect a Plant Against Different Larval Stages of an Insect
Feeding bioassays with different larval stages of the insect were used to monitor the isolation and identification of two bioactive constituents that could explain the natural resistance of this plant.
Seasonal Anointment with Millipedes in a Wild Primate: A Chemical Defense Against Insects?
It is argued that the secretion that rubs off on the monkeys in the course of anointment provides protection against insects, particularly mosquitoes (and the bot flies they transmit) during the rainy season.
Attractive and defensive functions of the ultraviolet pigments of a flower (Hypericum calycinum)
It is found the DIPs to be present in high concentration in the anthers and ovarian wall of the flower, suggesting that the compounds also serve in defense.
Collisionally-induced dissociation mass spectra of organic sulfate anions
The collisionally-induced dissociation mass spectra of a variety of organic sulfate ester anions are described and mechanistically rationalized. A cyclic syn-elimination pathway, analogous to that of
A cyanoallyl glucoside from Alliaria petiolata, as a feeding deterrent for larvae of Pieris napi oleracea.
Feeding inhibition assays showed comparable activity for the synthetic and natural glycosides, and structural assignment was confirmed by synthesis of peracetylated alliarinoside and its 2E isomer.
Defensive production of quinoline by a phasmid insect (Oreophoetes peruana).
The glands of O. peruana nymphs, at molting, do not extricate the shed cuticular lining of the glands, thereby managing not to lose their secretory supply when they cast their skin, and are able to discharge secretion even while still teneral after molting.
Self-defensive layer-by-layer films with bacteria-triggered antibiotic release.
These coatings present a promising way to incorporate antibacterial agents at surfaces to prevent bacterial colonization of implanted biomedical devices and contribute to the development of antibiotic resistance.
Defensive production of formic acid (80%) by a carabid beetle (Galerita lecontei).
The carabid beetle Galerita lecontei has a pair of abdominal defensive glands that secrete a mixture of formic acid, acetic acid, and lipophilic components (long-chain hydrocarbons and esters) which it aims accurately toward parts of the body subjected to assault.
Evaluation of the Synthetic Major Component of the Sex Pheromone of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)
In wind-tunnel bioassays, dispensers loaded with 1 μg of the synthetic major component of the sex pheromone emitted by Tuta absoluta (Meyrick) females were found to be highly attractive to conspecific males.