The article below suggests that the best solution is to attract birds which will eat the larvae themselves or feed them to their nestlings in short order. They also mention a solution of pyrethrum and black soap if you really want to spray but it will likely kill beneficial insects too.
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The article below suggests that the best solution is to attract birds which will eat the larvae themselves or feed them to their nestlings in short order. They also mention a solution of pyrethrum and black soap if you really want to spray but it will likely kill beneficial insects too.
https://jardinerfacile.fr/mouche-a-scie-tout-savoir-sur-ce-nuisible-du-jardin/
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw