Essays about: "coccinella"

Found 2 essays containing the word coccinella.

1. 1. Responses of aphids to semiochemicals released from ladybirds

   University essay from SLU/Dept. of Ecology

   Author : Feng Youren; [2012]
   Keywords : Rhopalosiphum padi L.; Coccinella septempunctata L.; residues; volatiles; track; aphid settling; aphid olfactory response;

   Abstract : Predatory ladybirds, as natural enemies of aphids, can influence their prey in various ways, for example by consuming them or making the aphids drop off from their host plants. In this study, I have examined whether aphids can respond to the semiochemicals released from ladybirds. READ MORE

3. 2. Associated learning of odour and colour in the seven-spotted ladybird Coccinella septempunctata (L.) : an olfactometer experiment

   University essay from SLU/Dept. of Entomology

   Author : Cecilia Remén; [2004]
   Keywords : Coccinella septempunctata; attraction; odour orientation;

   Abstract : The ability of the seven-spotted ladybird Coccinella septempunctata (L.) to learn to associate a combined stimulus of colour and odour with food was investigated. Four odours (menthol, 1,8-cineole, methyl salicylate and perfume) and three colours (red, yellow and green) formed twelve treatments that were combined with aphids and sweetened butter. READ MORE