- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 11 to 20 of 3213 (0.016 seconds)| 11 |
Biochemical studies on the mechanism of action of a Bacillus thuringiensis delta-endotoxinCummings, Corinne January 1992 (has links)
No description available.
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Morphology and epidemiology of some parasitic copepods (Poecilostomatoida: ergasilidae) from British freshwater fishAbdelhalim, Abuelgasim I. January 1990 (has links)
No description available.
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Pathogen virulence and competitive ability, an Empirical study using an insect modelStaves, Peter Andrew January 2009 (has links)
No description available.
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| 14 |
Studies on the Pathogenicity, Bionomics and Control of Trichodorus spp and Longidorus spp on Sugar BeetCooke, D. A. January 1976 (has links)
No description available.
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| 15 |
Studies on the mechanism of action of gonadotrophins on steroidogenesis in the ovary of the immature ratEbong, P. E. January 1981 (has links)
No description available.
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Optimising insecticide spray placement in cereal crops by minimising beneficial arthropod exposureAlford, James January 2002 (has links)
No description available.
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Development of improved foliar application technology for entomopathogenic nematodesPiggott, Simon James January 2001 (has links)
No description available.
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Sorption-desorption, extraction and mixed solvent studies of pyrethroids on soils and bed nets using GC-MS/NICIAli El Haj, Mohammed Adam January 2001 (has links)
No description available.
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Factors affecting the movements of stocked fishCresswell, R. C. January 1979 (has links)
No description available.
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Diel patterns of behaviour in the western flower thripsHolmes, Neil David January 2006 (has links)
Frankliniella occidentalis (pergande) is a serious pest of protected crops within the UK because it damages crops and is a vector of tospoviruses. It is resistant to a wide range of insecticides and exhibits thigmokinetic behaviour, making contact between pest and treatment difficult. Applying control procedures to correspond with the diel behaviour patterns of F. occidentalis could enhance control ofthrips. Studies of glasshouse crops showed that the abundance of adults on leaves and flowers increased in ~he afternoon compared to the morning. This could not be accounted for by movements within or between plants, but could be from sites off the plant. This hypothesis deserves further investigation. Infrared videography in the glasshouse generally showed little difference In abundance on plant parts between scotophase and photoppase. In addition, observations made at the time suggested that there was little difference in locomotory activity between the light phases. Contrastingly, laboratory locomotory activity patterns showed an increase in the early morning and late afternoon. A light burst during the scotophase, devised in the lliboratory to enhance locomotory activity, had little effect on thrips in a cucumber glasshouse. These two findings cast doubt on the applicability of laboratory studies to the glasshouse. Flight could be predicted well using ambient light and temperature and showed a clear diel pattern. There was a diel pattern of larval dropping to the ground to pupate, with the majority of larvae falling between late afternoon and midnight. Further sampling within a ,?ucumber glasshouse showed that on any particular day most larvae dropped within a two-hour window. Flight activity, and larvae falling from the crop showed clear' diel patterns. Locomotory activity on the crop djd not show a clear diel pattern. Interpretation and use of these findings would depend upon the type of control procedure applied to a crop.
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