Many theories attempt to explain why sexual reproduction has invaded life so thoroughly.
Some are plausible, but there remains a need for evolutionary biologists to identify the main …

Many Liriomyza species are pests of agricultural and ornamental plants. In the past two
decades, the occurrence and distribution of certain Liriomyza species have changed …

This chapter looks at aphids from a taxonomist's viewpoint. It highlights some of the
problems of interpreting the observed variation within and between species, and discusses …

Aphids are among the major global pest groups, causing serious economic damage to many
food and commodity crops in most parts of the world. This revision and update of the well …

Cyclical parthenogens, including aphids, are attractive models for comparing the genetic
outcomes of sexual and asexual reproduction, which determine their respective evolutionary …

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 …

Asexual organisms that naturally coexist with sexual relatives may hold the key to
understanding the maintenance of sex and recombination, a long‐standing problem in …

BACKGROUND: The polyphagous cotton‐melon aphid Aphis gossypii Glover is structured
into geographically widespread host races comprising a few clones specialised on …

This chapter focuses on the genetic variation of Indian melons for resistance to fungal,
bacterial and viral diseases, nematode and insect pests and tolerance to soil salinity …

Populations of clonal organisms are often represented as being evolutionary inert with
persistent genetic fidelity. The advent of molecular methods and the corresponding …