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Articles 1441 - 1443 of 1443

Full-Text Articles in Life Sciences

Deterrence Of Repeated Oviposition In Sorghum Shootfly Atherigona Soccata, Ashok K. Raina Sep 1981

Deterrence Of Repeated Oviposition In Sorghum Shootfly Atherigona Soccata, Ashok K. Raina

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The sorghum shootfly, Atherigona soccata, under low population density conditions lays one egg per sorghum plant. Possible regulatory mechanisms of this oviposition behavior are reported. The presence of an egg thoroughly washed and reattached to a leaf does not deter further oviposition, indicating the absence of visual cues. When washings from eggs were sprayed on sorghum plants, or when plants from which eggs had been removed were presented to a gravid female, significant deterrence was observed. Apparently a deterrent pheromone is associated with the water-soluble glue with which the females attach their eggs to the leaves. Some deterrent effect persists …

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Ecological And Genetic Separation Of Three Sympatric Species Of Aedes (Diptera: Culicidae) From The Kenya Coast, L. P. Lounibos, L. E. Munstermann Jan 1981

Ecological And Genetic Separation Of Three Sympatric Species Of Aedes (Diptera: Culicidae) From The Kenya Coast, L. P. Lounibos, L. E. Munstermann

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Aedes ledgeri Huang, A. soleatus Edw. and A. calceatus Edw. of the group of A. aegypti (L.) of the subgenus Stegomyia collected on the coast of Kenya are distinguished on the strength of ecological and genetic (isozyme) data. The preferred oviposition sites of A. ledgeri and A. soleatus were tree holes above ground level, whereas A. calceatus favoured abandoned gastropod shells. A. ledgeri was most abundant in ecotonal habitats and A. soleatus in undisturbed forest At least two diagnostic enzyme loci separated each of the three species pairs. © 1981, Cambridge University Press. All rights reserved.

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Proteins And Surface Proteins Of Leishmania Promastigotes And Their Possible Relevance To The Characterisation Of Strains, R. Ramasamy, H. Jamnadas, M. J. Mutinga Jan 1981

Proteins And Surface Proteins Of Leishmania Promastigotes And Their Possible Relevance To The Characterisation Of Strains, R. Ramasamy, H. Jamnadas, M. J. Mutinga

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Ramasamy R., Jamnadas H. & Mutinga M.J. 1981. Proteins and surface proteins of Leishmania promastigotes and their possible relevance to the characterisation of strains. International Journal for Parasitology 11: 387-390. Two strains of Leishmania isolated from phlebotomine flies and another one from a patient with kala-azar were grown in culture as promastigotes. They were analysed for protein composition and surface proteins by polyacrylamide gel electrophoresis after surface radiolabelling. Differences were observed in the characteristic patterns of proteins and surface proteins between the two strains that are likely to be Leishmania donovani and the other strain. Such differences may prove valuable …

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