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The orientation of pea aphids (Acyrthosiphon pisum (Harr.)) after a reaction by falling


, : The orientation of pea aphids (Acyrthosiphon pisum (Harr.)) after a reaction by falling. Zeitschrift fur pflanzenkrankheiten und Pflanzenschutz 79(11/12): 729-742

When aphids are disturbed on their food-plants, they often react by falling to the ground. The orientation of apterae of Acyrthosiphon pisum (Harris) on flat surfaces, in relation to vertical objects in the vicinity, was investigated in the laboratory in West Germany. Aphids were found to be capable of orientation by visual means. They were attracted to vertical features such as grey stripes or sticks.

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