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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    BioControl 16 (1971), S. 159-164 
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé La découverte en 1964 d’une phéromone sexuelle efficace chez le foreur de la canne à sucre,Diatraea saccharalis (F.) a stimulé la recherche pour identifier et synthétiser la phéromone et faire l’étude de ses possibilités d’emploi dans la lutte contre ces ravageurs.D. saccharalis est le principal insecte nuisible à la canne à sucre en Louisiane où il cause environ 13% des pertes annuelles. Les femelles vierges commencent à émettre ce produit chimique après l’émergence et elles sont le plus attractives pendant les trois premiers jours de vie, ensuite l’attraction diminue avec l’âge. Généralement les femelles cessent d’attirer les mâles après l’accouplement et la majorité des femelles s’accouplent seulement une fois dans la nature, où l’activité sexuelle a lieu entre une heure et quatre heures du matin. Plus d’un million de larves ont été élevées en laboratoire ces quatre dernières années. Environ 75% des abdomens des femelles obtenues ont été utilisés par les chimistes qui cherchent à identifier la phéromone. Des réductions significatives de l’infestation par le foreur et des préjudices à la canne à sucre ont été enregistrées dans de petites parcelles où étaient disposés 400 à 800 pièges par acre, chaque piège contenant une femelle vierge. Il n’y a pas eu de réductions significatives l’année suivante quand la densité des pièges a été réduite à 80 par acre, cependant les captures de mâles ont augmenté de presque 2,5 fois. Les nombres de mâles marqués recapturés au point de lâcher ne diffèrent pas significativement si les lâchers ont été faits à des distances de 40, 80, 160 et 320 pieds du piège renfermant les femelles vierges, et seulement 4,44 pour cent des mâles ont été recapturés. Ces phénomènes sont peut être dus à la dispersion des mâles à partir des points de lâcher avant leur réponse à la phéromone. Le manque de spécificité de la phéromone a été déjà signalé. Pendant les deux ans d’essais dans la nature, les pièges avec les femelles vierges deD. saccharalis ont attiré beaucoup de mâles deCrambus teterrellus Zincken.
    Notes: Abstract Investigations with the sugarcane borer sex pheromone have been conducted in the laboratory and field since 1964 to: (1) develop a suitable synthetic diet for rearing large numbers of larvae; (2) develop a reliable bioassay to aid chemical studies of the pheromone; (3) study male response in the field to the pheromone; (4) determine the effects on natural populations of trapping males in small field plots; and (5) identify the pheromone. More than 1,000,000D. saccharalis have been reared on synthetic diets during the past 4 years. Bioassay techniques for detecting active fractions separated during chemical studies have been developed. Statistically significant reductions in sugarcane borer infestations and damage to sugarcane have been attained in small replicated field plots. Male movement in the field has been studied utilizing marking and release techniques. About 1400 males of the bluegrass webworm,C. teterrellus, responded to cagedD. saccharalis females during two years of field work, thus providing evidence for a lack of species specificity of the pheromone.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 40 (1984), S. 352-353 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The problem of arrested or delayed development was examined in the sugar cane borer,Diatraea saccharalis. It was found that the insect can either enter diapause or exhibit a period of delayed metamorphosis according to the photoperiod conditions prevailing. We have observed the development characteristics ofD. saccharalis and conclude that a distinction should be made between a delayed metamorphosis phase and a diapause stage.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 41 (1985), S. 267-269 
    ISSN: 1420-9071
    Keywords: Diapause ; oligopause ; sugarcane borer ; Diatraea saccharalis ; Lepidoptera ; Pyralidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sugarcane borers enter a state of delayed metamorphosis when exposed to a 12-h photophase at 21°C. Larval feeding, growth, and molting continues but pupation is suppressed under these conditions.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 8 (1982), S. 1455-1462 
    ISSN: 1573-1561
    Keywords: Efficacy ; electroantennogram ; looplure ; response threshold ; sex attractant ; trapping ; Trichoplusia ni ; Pseudoplusia includens ; Rachiplusia ou ; pheromone ; Lepidoptera ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Source concentration differences of (Z)-7-dodecen-1-ol acetate, or looplure, were evaluated for field trapping efficiency and electrophysiological responses with malePseudoplusia includens (Walker),Trichoplusia ni (Hubner) andRachiplusia ou (Guenné) (Lepidoptera: Noctuidae). Sticky traps baited with 1000 μg of the lure captured a significantly greater (P 〈 0.05) number of maleP. includens andT. ni than any other concentration;R. ou males were caught at a greater rate in traps baited with 100 μg of looplure, significantly more (P 〈 0.05) than with 1000 μg. Electroantennogram (EAG) studies demonstrated that antennae of maleP. includens have a lower response threshold to looplure than eitherT. ni orR. ou antennae, the latter demonstrating the highest significant threshold of response. No differences in the stimulus-response functions of the three species were detected.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 1984-04-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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  • 6
    Publication Date: 1985-02-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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