Inhibition of larval growth of Dαcus oleαe by topical application of streptomycin to olives

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Published: Jan 8, 1983
DOI: https://doi.org/10.12681/eh.13896
Keywords:
Antibiotic effects Dacus oleae Insect symbioticides Larval growth inhibition Olive fruit fly Streptomicyn effects Tephritidae growth inhibition Surface-active substance effects
Μ.Ε. Tzanakakis
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki
D.Α. Prophetou
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki
G.N. Vassiliou
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki
J.J. Papadopoulos
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki
Abstract
Olives of four varieties were oviposited by females of Dacus oleae (Gmelin) (Diptera: Tephritidae). One to four hours or one day later, a 5 μl drop of streptomycin sulphate solution in tap water was applied to the oviposition hole. If applied 1-4 hours after oviposition, concentrations of 0.1, 0.3, or 1% were equally effective, inhibiting larval growth in over 85% of the olive fruits. If applied one day later, the 0.1% concentration was less effective, while the 0.3 and 1% ones retained their high effectiveness. With 2 μl drops, inhibition was not significantly lower than with 5 μl drops. The addition of 0.05% or 0.5% Agral 90 a spreader-wetter, had an activating effect, causing a substantial and significant increase of the percent inhibition.
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References
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