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


Published: Jan 8, 1983
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
D.Α. Prophetou
G.N. Vassiliou
J.J. Papadopoulos
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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