1,720,991 research outputs found
Utili accorgimenti operativi per una corretta identificazione delle uova di Aedes albopictus (Skuse)
No full textInfluenza della dieta su Sitophilus granarius (L.) e S. oryzae (L.). I. Ovideposizione
No full textThe oviposition of Sitophilus granarius and Sitophilus oryzae was studied, at the same conditions of light, T and RH, on cereal stored grains (wheat, barley, pop-corn and yellow dent corn) and alimentary pasta (pasta containing eggs, maize pasta, brown pasta, two short shape durum wheat pasta and one long shape of the kind “Bigoli”). The total number of laid eggs and the fecundity evolution were recorded allowing to establish what sort of cereal grains and pasta is the most open to S. granarius and S. oryzae attack. For both species wheat, barley and pasta were the most preferred for oviposition, while the pasta “Bigoli” was the less. S. oryzae has laid eggs into all the substrates, mainly pasta, more than S. granarius
Semiochemicals affecting the host-related behaviour of the dry bean beetle Acanthoscelides obtectus (Say)
No full textA laboratory study on the chemical cues influencing the behaviour of Acanthoscelides obtectus (Coleoptera, Bruchidae) on dry bean seeds was carried out to identify possible semiochemicals affecting the oviposition of the beetle. In an olfactometer, A. obtectus females preferred the odour of clean beans to that of beans where conspecifics had developed; an ether extract of such beans was repellent to the insect. Some hydrocarbons that are repellent to females were identified; the effect of heptacosane on the oviposition was studied
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