Zur biologischen Wirkung zweier neuer Phosphorsäureester des 2,5-Dichlor-methyl-thiophenols, CELA S 2957 und CELA K 673
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The organophophorus compounds CELA S 2957, O [2,5-dichloro-4-(methylthio) -phenyl]-O,O-diethyl-phosphorothioate and CELA K 673, O-[2,5-dichloro-4-(methylthio) -phenyl] -O-ethyl-methylphosphonothioate are new wide-spectrum insecticidal and acaricidal substances. Extensive greenhouse and field tests under moderate climate conditions have shown the efficacy against sucking and biting insects as well as mites. K 673 has also given good control of PO-resistant mites. In all our greenhouse and field tests phytotoxicity never has been observed, except a slight influence on the growth of grapes caused by K 673.
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