Results 21 to 30 of about 118,709 (297)

Averaging of the electron effective mass in multicomponent transparent conducting oxides [PDF]

open access: yes, 2007
We find that layered materials composed of various oxides of cations with $s^2$ electronic configuration, $XY_2$O$_4$, $X$=In or Sc, $Y$=Ga, Zn, Al, Cd and/or Mg, exhibit isotropic electron effective mass which can be obtained via averaging over those of
Medvedeva, J. E.
core   +3 more sources

Evolutionary Reversals During Viral Adaptation to Alternating Hosts [PDF]

open access: yesGenetics, 2000
AbstractExperimental adaptation of the bacteriophage ϕX174 to a Salmonella host depressed its ability to grow on the traditional Escherichia host, whereas adaptation to Escherichia did not appreciably affect growth on Salmonella. Continued host switching consistently exhibited this pattern.
W D, Crill, H A, Wichman, J J, Bull
openaire   +2 more sources

New Lepidoptera-Parasitoid Associations in Weedy Corn Plantings: A Potential Alternate Host for \u3ci\u3eOstrinia Nubilalis\u3c/i\u3e (Lepidoptera: Pyralidae) Parasitoids [PDF]

open access: yes, 2017
Larvae of the common sooty wing, Pholisora catullus, and pupae of the yellow-collared scape moth, Cisseps Fulvicollis, were collected in corn plantings containing different manipulated, indigenous weed communities to determine if these Lepidoptera had ...
Pavuk, Daniel M, Stinner, Benjamin R
core   +2 more sources

Goats as alternative hosts of cattle ticks

open access: yesOnderstepoort J Vet Res, 2007
The objective of this study was to compare the presence on goats and cattle of adult ticks that usually infest cattle. To this end ticks collected from sets of five goats were compared with those collected from sets of five cattle at 72 communal dip-tanks in the eastern region of the Eastern Cape Province. Amblyomma hebraeum was present on goats at
Nyangiwe, Nkululeko, Horak, Ivan Gerard
openaire   +4 more sources

Biology and Control of the Strawberry Aphid, Chaetosiphon fragaefolli (Cockerell) (Homoptera: Aphididae) in Florida

open access: yesEDIS, 2005
The strawberry (Fragaria x ananassa Duchesne) hosts a wide variety of aphid species. Most of these species have an ample variety of alternate hosts that include strawberries. The true strawberry aphid, Chaetosiphon fragaefolli (Cockerell) (Fig.
Silvia I. Rondon, Daniel J. Cantliffe
doaj   +5 more sources

Challenges to the exploitation of host plant resistance for Striga management in cereals and legumes by farmers in sub-Saharan Africa: a review

open access: yesActa Agriculturae Scandinavica. Section B, Soil and Plant Science, 2019
Striga hermonthica, Striga asiatica and Striga gesneroides are obligate root parasites that cause severe yield losses in cereals and legumes in sub-Saharan Africa. Genetic control of Striga through resistance is widely considered to be the most practical
Ronald Mandumbu   +3 more
doaj   +1 more source

Population Diversity of Puccinia graminis is Sustained Through Sexual Cycle on Alternate Hosts

open access: yesJournal of Integrative Agriculture, 2014
A high degree of virulence diversity has been maintained in the population of Puccinia graminis f. sp. tritici (Pgt) in northwestern United States. Although Berberis vulgaris is present in the region and Pgt has been isolated from aecial infections on B.
Yue Jin, Matt Rouse, Jim Groth
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   +2 more sources

An Energy-Aware Host Resource Management Framework for Two-Tier Virtualized Cloud Data Centers

open access: yesIEEE Access, 2021
The high energy consumption of cloud data centers is one of the key issues restricting the future development of the cloud computing industry. For two-tier virtualized data centers in which containers are deployed on VMs, this paper conducts an in-depth ...
Chi Zhang, Yuxin Wang, Hao Wu, He Guo
doaj   +1 more source

A Procedure for Sampling Nymphs of Saratoga Spittlebug, \u3ci\u3eAphrophora Saratogensis\u3c/i\u3e (Homoptera: Cercopidae), Using Percentage of Sample-Units Infested [PDF]

open access: yes, 2017
A method is proposed for rapidly estimating the nymphal population of the Saratoga spittlebug on alternate host plants in young red pine plantations. The method is based on an assumption that the number of nymphs per sample unit is distributed within an ...
Hobrla, Sharon L, Wilson, Louis F
core   +2 more sources

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