Results 31 to 40 of about 31,208 (268)

Studies on Aphididæ. I.* [PDF]

open access: yesAnnals of the Entomological Society of America, 1908
What is supposed to be this species was first described by Asa Fitch in his “Catalogueof the Homoptera of New York” in 1851 as Aphis betulA¦colens . Monell described it from Missouri as Callipterus betulA¦colens , n. sp., and placed Aphis betulA¦colens of Fitch as doubtfully synonymous. Thomas hesitatingly placed this species and Calaphis betulella
openaire   +5 more sources

Molecular evolution of aphids and their primary ( Buchnera sp.) and secondary endosymbionts: implications for the role of symbiosis in insect evolution. [PDF]

open access: yes, 2001
Aphids maintain an obligate, endosymbiotic association with Buchnera sp., a bacterium closely related to Escherichia coli. Bacteria are housed in specialized cells of organ-like structures called bacteriomes in the hemocoel of the aphid and are ...
Ham, R.C.H.J., van   +5 more
core   +6 more sources

Phylogenetic relationship and characterization of the complete mitochondrial genome of the black citrus aphid, Aphis aurantii (Hemiptera: Aphididae)

open access: yesMitochondrial DNA. Part B. Resources, 2019
The black citrus aphid Aphis aurantii is a major pest of citrus and tea plants. In this study, we determined the complete mitochondrial genome (mitogenome) of A. aurantii.
Ying Wang   +3 more
doaj   +1 more source

Flight activity of aphids as potential vectors of viral infection of alfalfa in Serbia [PDF]

open access: yesPesticidi i Fitomedicina, 2017
Flight activity of aphids as potential vectors of viral infection of alfalfa plants were monitored in Serbia for the first time in Europe. Research was conducted at the location Progar (Srem) for two years using six yellow water traps.
Jovičić Ivana   +2 more
doaj   +1 more source

Was Dan Janzen (1977) right about aphid clones being a "super-organism", i.e. a single "evolutionary individual"? : new insights from the use of molecular marker systems [PDF]

open access: yes, 2008
Dan Janzen proposed in a paper in 1977 (loc. cit.), that a clone of aphids and for that matter dandelions consists, respectively, of one large ‘super-organism’.
Loxdale, Hugh D.
core   +1 more source

The complete mitochondrial genome of Aphis gossypii Glover, 1877 (Hemiptera: Aphididae) collected in Korean peninsula

open access: yesMitochondrial DNA. Part B. Resources, 2019
Aphid gosypii Glover, 1877 is a widely recognized economically important aphid species in the world. We have determined mitochondrial genome of A. gossypii collected in Korean peninsula. The circular mitogenome of A.
Jonghyun Park   +4 more
doaj   +1 more source

Rubidium marking of Aphidius rhopalosiphi (Hymenoptera: Braconidae) on Sitobion avenae (Hemiptera: Aphididae) reared on a diet supplemented with RbCl

open access: yesEuropean Journal of Entomology, 2005
Markers are essential to study movements of insects in their natural habitat. Among the available techniques, trace elements may be applied to insects as small as parasitoids. Rubidium is the most common element used for marking insects.
Frédéric MURATORI   +2 more
doaj   +1 more source

Morphology and ultrastructure of the male reproductive system of the woolly beech aphid Phyllaphis fagi (Hemiptera: Aphididae: Phyllaphidinae)

open access: yesEuropean Journal of Entomology, 2008
In the present paper we describe for the first time the ultrastructure of the male reproductive system of aphids using Phyllaphis fagi as a representative. Paired testes of this species consist of three follicles each, arranged in a rosette, the walls of
Karina WIECZOREK, Piotr SWIĄTEK
doaj   +1 more source

Facultative symbionts associated with aphid populations in citrus orchards in northern Tunisia

open access: yesEuropean Journal of Entomology, 2020
Like many insects, aphids (Hemiptera: Aphididae) can host a wide diversity of symbiotic bacteria that can be important drivers of their evolutionary ecology.
François RENOZ   +5 more
doaj   +1 more source

Grass Hosts of Cereal Aphids (Hemiptera: Aphididae) Between Wheat-Cropping Cycles in South Dakota [PDF]

open access: yes, 2018
Several grasses may serve as alternative hosts for cereal aphids during the interim between small-grain crops in South Dakota, but field studies to determine which grasses are important have not been undertaken.
Dagel, Kurt J, Hesler, Louis S
core   +1 more source

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