Results 151 to 160 of about 703 (185)

The Impact of High-Temperature Stress on the Growth and Development of Tuta absoluta (Meyrick). [PDF]

Insects
Zhou J, Luo W, Song S, Wang Z, Zhu X, Gao S, He W, Xu J.   +7 more
europepmc   +1 more source

The spatial distribution of canopy-resident and ground-resident cereal aphids (Sitobion avenae and Metopolophium dirhodum) in winter wheat [PDF]

Arthropod-Plant Interactions, 2012
We investigated, within two cereal fields in Southern England, the within-canopy spatial distribution of the aphids Sitobion avenae and Metopolophium dirhodum in relation to crop yield and plant nitrogen.
Linton Winder, Colin J Alexander, Joe N Perry   +2 more
exaly   +2 more sources

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Metopolophium dirhodum . [Distribution map].

Distribution Maps of Plant Pests, 2006
Abstract A new distribution map is provided for Metopolophium dirhodum (Walker) Aphidoidea: Aphididae Hosts: Mainly cereals and grasses ( Poaceae ), but overwinters in cool climates on rose ( Rosa spp. ).
null CABI, null EPPO
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Starch Characteristics of Aphid (Metopolophium dirhodum) Infested Barley

Starch - Stärke, 1989
AbstractStarch was isolated from barley (cv. Triumph) which had been infested with the rose‐grain aphid Metopolophium dirhodum. Physico‐chemical properties and functional characteristics of the starches and a control starch were studied. Amylograph curves indicated higher residual α‐amylase activity on the control starch than on starch samples isolated
K. Lorenz, Fort Collins
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On the Ecological Genetics of Metopolophium dirhodum (Walker) (Hemiptera, Aphididae)

Zeitschrift für Angewandte Entomologie, 1985
AbstractAbout 120 clones of Metopolophium dirhodum (Walker) were established from aphids, which were sampled from barley, wheat and oat fields in Germany. All clones were analysed for their host plant adaptation (population increase in 12 days ‐ P12) to barley, wheat and oat and for their life cycle strategy. M.
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Tolerance of antibiotic and susceptible cereal seedlings to the aphids Metopolophium dirhodum and Rhopalosiphum padi

Annals of Applied Biology, 1995
SummarySome cereal seedlings exhibit antibiotic and antixenotic resistance to the aphids Metopolophium dirhodum (Walker) and Rhopalosiphum padi (L.), because the seedlings contain hydroxamic acids or gramine. The association between tolerance to aphids and aphid antibiosis was investigated for three cereals, Dollarbird wheat Vulcan wheat and Yagan ...
R J. Lamb, P A. Mackay
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Effects of Metopolophium dirhodum on Spring Wheat in the Glasshouse

Plant Pathology, 1974
SUMMARY Pot‐grown plants of spring wheat, cultivar Maris Dove, Were subjected, commencing at ear emergence, to different, constant levelsof infestation hy Metopolophium dirhodum (Wlk.) in a glasshouse.
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Reproductive strategy of winged and wingless morphs of the aphids Sitobion avenae and Metopolophium dirhodum

Annals of Applied Biology, 1977
SUMMARYThe reproduction of apterous and alate morphs of the aphidsSitobion avenaeandMetopolophium dirhodumis compared on the basis of fecundity in 5‐ and 10‐day periods of adult life. Apterae of both species are consistently more fecund than alatae of comparable weight, producing about three more nymphs on average in any 5‐day period.
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The effect of cereal growth stages on the reproductive activity of Sitobion avenue and Metopolophium dirhodum

Annals of Applied Biology, 1979
SUMMARYApterous Sitobion avenae on oats were found to have a higher reproductive rate on the ears (5–95 nymphs per day) than on young leaves (3–78 nymphs per day), mature leaves (2–17 nymphs per day) or senescent leaves (2–08 nymphs per day). At each growth stage of the the host plant large aphids gave birth to more young than small aphids, but aphids ...
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