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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 7 (1983), S. 35-41 
    ISSN: 1432-1009
    Keywords: Pest control ; Pest pheromones ; Pest habitat management ; Semiochemicals ; Natural enemy enhancement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The chemical environment of pest species may be considered a habitat susceptible to management Management may be by means of manipulation of the environment of the pest for population suppression or for enhancement of natural enemies Examples of each are reviewed here Chemical stimuli influencing the behavior of phytophagous insects include host plant originated stimuli and pheromones The latter, especially sex pheromones, have proved most successful as tools for manipulation of pest population dynamics Factors influencing search behavior of natural enemies include habitat characteristics such as crop, associated plants and plant assemblages, host plant characteristics, influence of associated organisms, and characteristics of the searching entomophage Recent studies have shown potential for simultaneous management of a pest species and enhancement of natural enemies using pest pheromones
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  • 2
    ISSN: 1432-1009
    Keywords: Agroecosystems ; Integrated pest management (IPM) ; Holistic approaches ; Ecosystem-oriented pest management
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The article presents a holistic approach to studying and applying crop protection in agricultural systems A theoretical framework of integrated pest management (IPM) is presented that allows an understanding of pest population processes on a whole-agroecological-system basis The need for and emergence of holistic research on agroecosystems is discussed, as are the current trends in ecological theory and pest management
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 348 (1990), S. 635-636 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Females of M. croceipes fed on wildflower honey subsequently flew up-wind to the odour of honey, whereas naive females and females fed a pure aqueous sucrose solution both responded much more weakly (Fig. 1). To determine whether this oriented response to food was learned, female wasps were ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 257-259 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] When females of M. croceipes are presented with fresh faeces or the water extract of faeces (Fig. 1) on filter paper, they immediately rub the material with their antennae and sometimes probe it with their abdomens. This intense examination continues for several minutes unless interrupted. ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 393 (1998), S. 570-573 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In response to insect herbivory, plants synthesize and emit blends of volatile compounds from their damaged and undamaged tissues, which act as important host-location cues for parasitic insects. Here we use chemical and behavioural assays to show that these plant emissions can transmit ...
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Iron is not normally considered to be a constituent of health significance, and recommended limits for iron in drinking water supplies are based on aesthetic considerations. Experience in Malawi has demonstrated that, even when present in only trace amounts, iron can influence the consumer's acceptance of an improved borehole supply. The effect of the use of plastic construction materials on the iron content of village groundwater supplies was investigated using a statistical approach. The majority of groundwater points using only plastic materials was found to supply water containing less than the WHO guideline value of 0.3 mg/l iron. In contrast, the use of ferrous-materials increased the iron content of the water to unacceptable levels, sometimes causing the consumers to reject the borehole as a source of drinking water.Bacteriological data show that the quality of the alternative, traditional supply is far inferior to the new improved supply. An otherwise perfectly safe supply may therefore be abandoned as a direct result of contamination introduced by ‘down the hole’ components. This frustrates efforts to improve the well-being of rural communities, and is a waste of precious development resources.
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  • 7
    Publication Date: 2013-08-31
    Description: Attitude determination system design consisting of celestial sensor concept and data reduction program for continuous spacecraft knowledge
    Keywords: NAVIGATION
    Type: NASA-CR-66852
    Format: application/pdf
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 84 (1910), S. 203-203 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE dolomite quarry near Binn (Valais) affords such a large variety of grey sulpharsenites, mainly of lead and copper, that a new one is received with much hesitation; but a crystal recently obtained at Binn gives results which leave little doubt as to its independent character. The specimen ...
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  • 9
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    In:  CASI
    Publication Date: 2017-07-01
    Description: Coating concepts evaluated for advanced thrust chambers
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-CR-72604
    Format: application/pdf
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  • 10
    ISSN: 1432-1351
    Keywords: Key words Visual discrimination ; Hymenopteran parasitoid ; Host finding ; Learning predisposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Visual learning by the larval parasitoid, Microplitis croceipes Cresson (Hymenoptera: Braconidae) was investigated in flight chamber studies. During conditioning, free-ranging parasitoids were given a choice between two visual alternatives, only one of which offered a host larva. By using alternatives that differed in either color, shape or pattern, parasitoids could be conditioned to distinguish host sites on the basis of each of these visual cues. Tests during which no reward was offered were conducted following six rewards (ovipositions) at one of the two alternative stimuli. The test results reveal that M. croceipes learned to distinguish between shapes more readily than between colors or patterns. This high rate of shape learning in this parasitoid is in strong contrast to the learning capacity of honey bees, which have been shown to learn color better than pattern and pattern better than shapes. It is argued that the difference in learning capacities between M. croceipes and the honey bee may reflect the different selection pressures imposed on these two species by their natural ecological needs. The high rate of shape learning in  M. croceipes may be adaptive in dealing with the homochromatic but multishaped environment in which parasitoids have to locate their herbivorous hosts.
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