Isolation and identification of pheromones and their mode of action in African locusts

Informazioni relative al progetto

ID dell’accordo di sovvenzione: TS3*930249

Progetto chiuso

Data di avvio 1 Febbraio 1994

Data di completamento 31 Luglio 1997

Finanziato da

• Specific research and technological development programme (EEC) in the field of the life sciences and technologies for developing countries, 1990-1994

Costo totale

Nessun dato

Contributo UE

Nessun dato

Coordinato da

Universität Hannover
Germany

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Risultati sfruttabili

Pheromones and behaviour-modifying chemicals in African locusts and grasshoppers

In locust and grasshoppers, besides optical, tactile and acoustic signals, chemical communication plays an important role between conspecific individuals. Considering the aggregation behaviour in the desert locust 'Schistocerca gregaria' (Forsk.), several physiological processes are influenced by chemical factors. Acceleration of maturation was observed in grouped adult immature insects by volatile compounds produced by mature males. Egg-pod deposition is stimulated in grouped virgin females, separated from males by a perforated foil. Reduction of melanization was observed in nymphs reared in isolation. In olfactometer experiments a positive reaction to stage-specific volatiles (releaser pheromones) was observed in both nymphs and adults. All volatile substances elicited an antennal reaction. Laboratory and field test will show in which combination the chemicals can be used for disturbing gregarious behaviour.