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  • 1
    Electronic Resource
    Electronic Resource
    Chemoreception of amino acids by female fourth- and sixth-instar larvae of the spruce budworm (1998)
    Springer
    Entomologia experimentalis et applicata 86 (1998), S. 89-96 
    Details
    ISSN: 1570-7458
    Keywords: spruce budworm ; amino acids ; chemosensilla ; electrophysiology ; gustation ; Lepidoptera ; Tortricidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An electrophysiological approach was used to record the responses of maxillary styloconic sensilla of fourth- and sixth-instar larvae of the spruce budworm Choristoneura fumiferana to 14 amino acids. One cell in the lateral styloconic sensillum was identified as an amino acid-sensitive neuron. All of the amino acids tested, except l-proline and l-arginine, were detected by this cell. Arginine did not evoke a response from either the medial or lateral styloconic sensilla. Proline evoked responses from a cell in the medial styloconic sensillum. It is known from previous behavioural work that l-proline is a phagostimulant and l-valine inhibits feeding in Choristoneura; we thus further characterized the responses to these two amino acids. For both instars, l-proline was detected as low as 0.001 mmol/l and the maximal response was at 50 mmol/l. Stimulation of fourth- and sixth-instar larvae with l-valine showed that the maximum firing frequency was obtained at 1 mmol/l. Above and below this concentration, firing frequency decreases. Sensory responses to the amino acids stimuli did not correlate with known behavioral responses to similar stimuli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003136629671
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  • 2
    Electronic Resource
    Electronic Resource
    Orientation behavior of second-instar larvae of eastern spruce budwormChoristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) in a y-type olfactometer (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 837-845 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; conifers ; Picea sp. ; Abies sp. ; host volatiles ; attraction ; larval olfaction ; olfactometer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A two-choice, wind-tunnel olfactometer was designed and contructed to determine whether second-instar eastern spruce budworm larvae,Christoneura fumiferana (Clem.), could detect and discriminate among host-plant volatiles. Volatiles of current year's growth ofPicea glauca were preferred over those ofP. rubens, P. mariana, or air.Abies balsamea was preferred overP. mariana or air.P. rubens andP. mariana were both preferred over air. Two-year-old growth ofP. glauca, A. balsamea, P. rubens, andP. mariana were all preferred over air. Current year's growth of these host evergreen species was usually preferred over former year's growth of the same species in each case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012072
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  • 3
    Electronic Resource
    Electronic Resource
    Feeding preferences of spruce budworm (Choristoneura fumiferana Clem.) larvae to some host-plant chemicals (1981)
    Springer
    Journal of chemical ecology 7 (1981), S. 391-402 
    Details
    ISSN: 1573-1561
    Keywords: Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; Abies balsamea ; feeding stimulants ; feeding deterrents ; feeding preference ; sugars ; glycosides ; amino acids ; organic acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Single-choice and three-choice tests were used to determine the relative importance of host-plant chemical extracts in eliciting feeding by spruce bud worm larvae. Water-soluble components of the host trees are the most important and, of these, the sugar and glycoside fractions are the most stimulating. The amino acid and organic base fractions have no apparent effect. The organic acid fractions deter feeding slightly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00995761
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  • 4
    Electronic Resource
    Electronic Resource
    Tests for induction of feeding preferences in larvae of eastern spruce budworm using extracts from three host plants (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 809-817 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Lepidoptera ; Tortricidae ; Choristoneura fumiferana ; host preference ; deterrence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Feeding preferences to extracts from three host plants were determined for sixth-instar eastern spruce budworm larvae reared on one of three hosts or on artificial diet. Preferences of foliage-reared larvae were compared to those of diet-reared, or naive, larvae. No effect of plant induction was found using amino acids and bases and chloroform extracts on test disks in three-choice experiments. Possible effects of habituation for sugars and glycosides from white spruce were shown. Organic acids contributed to a phenomenon of avoidance learning in larvae reared on all three hosts, showing that this fraction from balsam fir was the least deterrent, while that from black spruce was the most deterrent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988308
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  • 5
    Electronic Resource
    Electronic Resource
    Feeding responses of eastern spruce budworm larvae to sucrose and other carbohydrates (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 233-239 
    Details
    ISSN: 1573-1561
    Keywords: Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; carbohydrates ; sucrose ; feeding preference ; behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Spruce budworm larvae reared on an artificial diet were tested for preference of twelve carbohydrates over a water control. A strong preference for sucrose was seen, followed by fructose, inositol, and glucose. Male and female larvae do not differ in their responses to sucrose. The behavioral threshold for sucrose is at 10−4 to 10−3 M, with a peak response in the range of 0.01 to 0.05 M sucrose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984019
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  • 6
    Electronic Resource
    Electronic Resource
    Feeding preferences of eastern spruce budworm larvae in two-choice tests with extracts of mature foliage and with pure amino acids (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 1649-1656 
    Details
    ISSN: 1573-1561
    Keywords: Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; amino acids ; proline ; sucrose ; extracts ; host plants ; feeding behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The feeding preferences and feeding rates of eastern spruce budworm on extracts from mature foliage normally avoided by larvae indicate that the chemical composition of four major host plants does not account for this avoidance. Other factors such as the degree of lignification and/or moisture content of the older foliage may play a more important role. Of 14 amino acids tested, alanine, lysine, proline, and serine stimulated feeding. The interactions of amino acids and sucrose were studied, and the results are discussed in relation to feeding preferences and feeding rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014549
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