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'Host Alternation' 
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article/chapitre/communication
Nutritional quality of phloem sap in relation to host plant-alternation in the bird cherry-oat aphid
J. Sandstrom | 2000Host alternation in aphids has been attributed to complementary growth of host plants, or more specifically to seasonal changes in the nitrogen quality of the phloem sap. In this report, seasonal fluctuation of free amino acids in phloem of the [...]
article/chapitre/communication
This paper reviews the evidence for the fundatrix specialization hypothesis and attempts to quantify the relative advantage of host alternation and define the conditions favouring the evolution of this way of life. Contrary to the predictions of[...]
article/chapitre/communication
The behaviour of summer and autumn winged forms of the black bean aphid, Aphis fabae Scopoli (Homoptera: Aphididae), was compared on two plants utilized at different stages of the insect's life cycle. Adult autumn migrants (gynoparae) are monoph[...]
article/chapitre/communication
S. Ward ; S. Leather ; J. Pickup ; R. Harrington | 19981. For a full assessment of explanations for the evolution of host-specificity it is necessary to estimate the probability that a dispersing parasite finds a host. We develop a method of estimating this success rate from samples of dispersing pa[...]
article/chapitre/communication
J. Sandstrom ; J. Pettersson | 2000The host alternating aphid, Rhopalosiphum padi (L.), feeds in summer on several different species of grasses but is monophagous on its winter host, Prunus padus L. The monophagy on P. padus could be a result of the restricted host range of the s[...]
