By Helmut van Emden, Richard Harrington
Aphids symbolize one of many world's significant insect pests, inflicting critical monetary harm to a number temperate and tropical plants. those diversity from grain plants and brassicas to potato, cotton, vegetable and fruit vegetation. This ebook offers a definitive reference quantity at the biology of aphids, their pest prestige, and the way to manage them. It contains nearly 30 specifically commissioned chapters from global specialists, mostly from Europe and North the US. themes lined diversity from host choice and feeding to circulate and dispersal, and from insecticide resistance to chemical, cultural and organic keep watch over equipment. There also are numerous case examine chapters, on built-in pest administration in particular crops.
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Additional resources for Aphids as crop pests
Parasitoids and hyperparasitoids were studied in North America by Shands et al. (1965) and Sullivan and van den Bosch (1971). Myzus persicae (peach–potato aphid) Myzus persicae is an exceptional species in many respects; cosmopolitan, extremely polyphagous, highly efficient as a virus vector, and with a great range of genetically-based variability in properties such as colour, life cycle, host-plant relationships, and methods of resisting insecticides. Adult apterous parthenogenetic females of M.
They have not, however, been used for aphids, or most other insect groups of agricultural importance, nor have they been accommodated into the Zoological Code of Nomenclature. On further reflection, it seems unrealistic to expect the wide acceptance and use in aphid taxonomy or agricultural entomology of the term semispecies and, even if it were accepted, that would still not resolve the problem of nomenclature. Rakauskas (2004) has recently revived Müller’s (1986) proposal for a broader use of the subspecies category to validate its application to aphid species complexes, and – of particular relevance to the present chapter – to meet the practical need of providing names that identify intraspecific categories in groups that include pest species.
Eastop on the length relationships between body parts (allometry), which can play havoc with the morphometric ratios and functions often used to discriminate between closely related species (Blackman and Spence, 1994). Thus, it is important to take into account the possible effects of season, host plant, and climate when examining samples of field-collected aphids. It is also necessary to bear in mind that a sample might consist of a single clone, especially if it comes from a warm temperate or subtropical region where the population has not gone through a sexual phase and is therefore more likely to be clonally structured.