Abstract 1 When aphid clones and clonality are discussed, it is still often said that they are
'genetically identical', a statement for which there is no direct evidence, and certainly not for …

Many plant‐feeding insect species considered to be polyphagous are in fact composed of
genetically differentiated sympatric populations that use different hosts and between which …

Few insects can match the ecological flexibility of aphids with their range of environmentally
and genetically determined phenotypes (Williams and Dixon, Chapter 3 this volume). They …

Background The importance of genetic diversity in successful biological invasions is
unclear. In animals, but not necessarily plants, increased genetic diversity is generally …

The carob moth, Ectomyelois ceratoniae (Zeller, 1839)(Lepidoptera: Pyralidae), is the most
important pest of pomegranate in Iran. As it has been rarely recorded on other host plants …

The study of intraspecific variation with respect to host plant utilization in polyphagous
insects is crucial for understanding evolutionary patterns of insect-plant interactions. Aphis …

Numerous soil‐dwelling Bacillus species form mutualistic relationships with plants, in which
the hosts derive an array of benefits, including the alteration of nutrient and chemical …

Few studies have investigated the roles that plant hybridization and individual plant
genotype play in promoting population divergence within arthropod species. Using nrDNA …

The beet armyworm, Spodoptera exigua (Hübner)(Lepidoptera: Noctuidae) is a highly
polyphagous pest which causes considerable economic losses to cotton and many …

In aphids, reproductive mode is generally assumed to be selected for by winter climate.
Sexual lineages produce frost‐resistant eggs, conferring an advantage in regions with cold …