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  • abscisic acid  (1)
  • ovicidal effects  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Effects of targets impregnated with the chitin synthesis inhibitor triflumuron on the blowfly Lucilia sericata (1998)
    Springer
    Entomologia experimentalis et applicata 87 (1998), S. 85-92 
    Details
    ISSN: 1570-7458
    Keywords: blowfly ; control ; Lucilia sericata ; ovicidal effects ; targets ; triflumuron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of exposure of adults of the blowfly Lucilia sericata (Meigen) for 24 h to cloth targets impregnated with the chitin synthesis inhibitor triflumuron plus sucrose or sucrose only, were considered. When both male and female L. sericata were exposed to targets treated with sucrose only, the percentage egg hatch varied between 60–75%. When both sexes were exposed to targets treated with 10% triflumuron plus sucrose the percentage egg hatch varied between 3–7%. When females alone were exposed to triflumuron, prior to the introduction of unexposed males, egg hatch varied between 4–14%. The exposure of males alone to 10% triflumuron treated targets, prior to the introduction of unexposed virgin females, did not give any consistent significant decrease in the mean percentage egg hatch. However, repetition of this trial with males exposed to targets treated with 15 or 20% triflumuron, resulted in a percentage egg hatch of 3.1% and 10.3%, respectively. These results suggest that at relatively high target concentrations, males can transfer effective doses of triflumuron to unexposed virgin females. The exposure of adults to triflumuron treated targets did not significantly increase the mortality of either male or female L. sericata. Furthermore, bioassays showed that there was no significant decline in the ovicidal effectiveness of targets treated with 10% triflumuron and sucrose solution following exposure to sun and rain for up to 8 weeks in 1995 and 1996. The results suggest that targets treated with triflumuron suspension concentrate and sucrose may form the basis of an effective system for the control of L. sericata in the field. However, the relatively high concentrations of triflumuron required and the low efficiency with which males are able to transfer effective doses to unexposed females may diminish one of the main theoretical advantages of using a chitin synthesis inhibitor, such as triflumuron, over a conventional insecticide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003250320554
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  • 2
    Electronic Resource
    Electronic Resource
    Growth retardant activity of paclobutrazol enantiomers in wheat seedlings (1994)
    Springer
    Plant growth regulation 15 (1994), S. 281-291 
    Details
    ISSN: 1573-5087
    Keywords: abscisic acid ; enantiomers ; gibberellin ; paclobutrazol ; sterols ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The resolved enantiomers of paclobutrazol appeared to have different primary modes of action as plant growth retardants in rht3 (tall) wheat seedlings. 2S,3S-Paclobutrazol reduced shoot growth more effectively than root growth, whereas the opposite was the case with the 2R,3R-enantiomer. Low concentrations (0.03–1.0 μM) of 2S,3S-paclobutrazol specifically inhibited gibberellin A1 (GA1) production in Rht3 (dwarf) seedlings without affecting shoot growth, confirming that inhibition of GA biosynthesis is the primary mode of action of this enantiomer. Reductions in shoot growth of rht3 (tall) wheat treated with 2S,3S-paclobutrazol were associated with reductions in GA1 content, an effect that could be reversed by gibberellic acid (GA3) application, showing that GAs are important regulators of light-grown shoot growth in wheat. The inhibition of root growth of wheat seedlings following treatment with 2R,3R-paclobutrazol was associated with a decline in de novo synthesis of major sterols, a decrease in stigmasterol: sitosterol ratio and an accumulation of the 14α-methyl sterol, obtusifoliol. Concentrations 〉3 μM 2S,3S-paclobutrazol also affected de novo sterol production in wheat roots, suggesting that root growth is more responsive to interference with sterol than GA biosynthesis. There was a decline in abscisic acid (ABA) content in Rht3 (dwarf) shoots treated with relatively high concentrations of 2S,3S-paclobutrazol but no effect with its optical isomer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029901
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    Paper (German National Licenses)
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