Zobrazeno 1 - 10 of 20 pro vyhledávání: '"H. F. Emden"'
1
Influence of temperature, photoperiod and host-plant on the bionomics of the melon ladybird Epilachna chrysomelina (F.) (Coleoptera: Coccinellidae)
Autor: H. F. Emden, David Wool
Publikováno v: Zeitschrift für Angewandte Entomologie. 91:256-262
The effect of controlled temperatures: 20, 25 and 30°C ± 1°C combined with photoperiods of 14/10 and 10/14 h light/ dark, and four different host plants (cucumber, snake cucumber, squash and watermelon) on the rate of development, duration of gene
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e53d1adfd6dc5d29f0f72145897c3cc3
https://doi.org/10.1111/j.1439-0418.1981.tb04477.x
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2
Intra- und interspezifische Beziehungen: Ihre Wirkung auf die Populationsstabilität im Rahmen der Schädlingsbekämpfung1
Autor: H. F. Emden
Publikováno v: Zeitschrift für Angewandte Entomologie. 77:242-251
Intra- and interspecific relationships: Their influence on population stability in the context of pest control. Ecological approaches to pest control are largely based on the theories of traditional population dynamics. Ecological energetics principl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3693e45368cc91ac629b0b2821448a16
https://doi.org/10.1111/j.1439-0418.1974.tb03254.x
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3
A possible genetic component in the adaptability of Myzus persicae (Sulz.) clones (Hom., Aphididae) to synthetic diet
Autor: H. F. Emden, David Wool
Publikováno v: Zeitschrift für Angewandte Entomologie. 91:225-231
The majority of 64 Myzus persicae clones failed to survive past the third generation on a synthetic diet, though earlier they had survived and reproduced well. The 5 clones that survived this “bottleneck” continued to flourish (beyond generation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4be315294e9944540fca5b9bff58e884
https://doi.org/10.1111/j.1439-0418.1981.tb04472.x
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4
A comparison of the fauna of cut and uncut grasslands
Autor: H. F. Emden, T. R. E. Southwood
Publikováno v: Zeitschrift für Angewandte Entomologie. 60:188-198
ynopsis A comparative account is given of the invertebrate fauna of cut and uncut grasslands. Differences were found in the total number of individuals, in the proportions of phytophagous and predatory species and in the biomass. Zusammenfassung Es w
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https://doi.org/10.1111/j.1439-0418.1967.tb02068.x
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5
Pale coloration in Aphis fabae reared on beans treated with the plant growth regulator, ethylene-bis-nitrourethane
Autor: C. H. B. Honeyborne, H. F. Emden
Publikováno v: Journal of Entomology Series A, General Entomology. 50:157-160
Aphis fabae reared on broad bean plants treated with the experimental growth stimulator ethylene-bis-nitrourethane were extremely pale in colour and this persisted for the life of the individual, even when first instar nymphs were transferred from tr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e74741bb90630e768cb9035032188650
https://doi.org/10.1111/j.1365-3032.1976.tb00130.x
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7
Are aphid mean relative growth rate and intrinsic rate of increase likely to show a correlation in plant resistance studies?
Autor: E. Wojciechowicz‐Zytko, H. F. Emden
Publikováno v: Journal of Applied Entomology. 119:405-409
In a study of the performance of Aphis fabae Scop. on 6 British and 3 Polish cultivars of Vicia faba L., the aphid showed a poor mean relative growth rate (MRGR) on the Polish cultivar Hangdown Bialy (p = < 0.05). Measurements of fecundity, the intri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4547aa17ab33abf34b4b6d1f49eec728
https://doi.org/10.1111/j.1439-0418.1995.tb01308.x
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8
Falling aphids enhance impact of biological control by parasitoids on partially aphid-resistant plant varieties
Autor: G R Gowling, H F Emden
Publikováno v: Annals of Applied Biology. 125:233-242
Summary Cage experiments, in which the population increase of Metopolophium dirhodum was measured either in the absence or presence of the parasitoid Aphidius rhopalosiphi, showed reductions of peak populations in the presence of the parasitoid of 30
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f021a8f7d11ab53254f5d91034d8b83
https://doi.org/10.1111/j.1744-7348.1994.tb04965.x
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9
Use of systemic insecticide to measure antixenosis to aphids in plant choice experiments
Autor: P. Vidyasagar, M. H. Kazemi, H. F. Emden
Publikováno v: Entomologia Experimentalis et Applicata. 58:69-74
Antixenosis in three wheat varieties (Timmo, Moghan 2 and Ommid) to Rhopalosiphum padi (L.) was measured by pairing plants of any two varieties with one plant of each pair treated with a soil drench of the systemic insecticide pirimicarb. Aphids were
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7cf1d319aaeafa5cf0651d5d7de8faf
https://doi.org/10.1111/j.1570-7458.1991.tb01453.x
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10
The effect of leaf excision on the performance of Myzus persicae and Brevicoryne brassicae in relation to the nutrient treatment of the plants
Autor: Margrethe A. Bashford, H. F. Emden
Publikováno v: Physiological Entomology. 1:67-71
Two groups of brussels sprout plants of one variety given different fertilizer treatments proved ‘resistant’ and ‘susceptible’ to both Myzus persicae and Breicoryrie brassicae, as measured by aphid mean relative growth rate. The hypothesis th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48b44b418bca08f6052ad0ab0846936f
https://doi.org/10.1111/j.1365-3032.1976.tb00887.x
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