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A study of behavioural habituation to a feeding deterrent in nymphs of Schistocerca gregaria
It is concluded that habituation via sensory stimulation is a central phenomenon of Schistocerca gregaria Forskål fifth instar larvae to a feeding deterrent, nicotine hydrogen tartrate, and its administration by gelatine capsules placed into the oesophagus resulted in behavioural habituation. Expand
Host plant finding in phytophagous insects: the case of the Colorado potato beetle
It is concluded that host plant finding is a chance event in this species and the observed high directionality of move must be an adaptation increasing probability of host finding. Expand
Evolutionary aspects of host plant specialisation - a study on bruchids (Coleoptera: Bruchidae)
It is suggested that host shifts are best explained by the changes in the bruchids’ chemosensory system that determines the females’ host selection behaviour, with stronger phylogenetic conservatism in Bruchus species than in Bruchidius species. Expand
Predispersal seed predation in leguminous species : seed morphology and bruchid distribution
The evolution of the seed size of plant species studied is not likely driven by bruchids or by other seed predators, and the closer the shape of the seeds of a leguminous plant species to a sphere, or the larger the seed volume, the higher the probability of bruchid infestation. Expand
Importance of visual and chemical cues in the development of an attractant trap for Epicometis (Tropinota) hirta Poda (Coleoptera: Scarabaeidae)
The sex ratio did not differ in traps with only visual or chemical cues, or with both cues together, and reflected the natural sex ratio of the local population, which showed a decrease in male to female ratio as the season progressed. Expand
Role of visual stimuli in host and mate location of the Colorado potato beetle
Visual responses of adult male and female Colorado potato beetles CPB, Leptinotarsa decemlineata (Say) (Coleoptera, Chrysomelidae) to 10 × 20 cm coloured paper‐boards, beetle‐sized coloured beads or dead CPB and to combinations of these in laboratory experiments were investigated to corroborate field observations on males' mate‐searching behaviour and increase the understanding of natural host‐ and mate‐finding processes. Expand
Orientation responses of the grasshopper, Melanoplus sanguinipes, to visual, olfactory and wind stimuli and their combinations
Prereproductive adults of the grasshopper, Melanoplus sanguinipes (F.) (Orthoptera, Acrididae), demonstrated orientation and movement towards both visual and olfactory stimulus sources in a still‐airExpand
Megabruchidius tonkineus (Pic, 1904) (Coleoptera: Bruchidae) first found in Hungary.
Adults of Megabruchidius tonkineus (Pic, 1904) emerged in the laboratory from pods of Gleditsia triacanthos collected in January and in October 2001 at the very centre of Budapest. It is likely thatExpand
Within field movement of overwintered Colorado potato beetle: a patch‐based approach
It is suggested that surrounding fields by wheat rather than fallow grounds should be studied as a possible strategy to reduce the movement of overwintered beetles between potato fields. Expand
Resource assessment and clutch size in the bean weevil, Acanthoscelides obtectus.
  • Á. Szentesi
  • Biology, Medicine
  • Pest management science
  • 1 April 2003
Bean weevil (Acanthoscelides obtectus (Say) females were found to use seeds differentially when different sizes were offered in multiple-choice tests, and seem to measure only relative seed size when a comparison is possible. Expand