Highly effective nematicides against pine wood nematodes containing chlorinated hydroxystilbene or salts thereof (preferably, 3',4'-Dichloro-3-hydroxystilbene and 3',5'-dichloro-3-hydroxystilbene) which are prepared by synthesizing chlorinated methoxystilbenes from chlorinated benzyl chloride compounds and methoxybenzaldehydes by the Wittig-Horner reaction, performing demethylation to obtain the chlorinated hydroxystilbenes, and preparing the salts thereof by conventional methods, if necessary.

The invention includes a pesticidal compound comprising at least one organic phenolic compound and at least one salt comprising a divalent cation. Preferably, the organic phenolic compound is chosen from Carvacrol, thymol or combinations thereof; and is derived from a natural source, preferably extracted from a member of the family Labiatae or Verbenacea. Preferably the divalent cation is a transition metal salt and more preferably is zinc chloride or zinc sulfate. The invention also includes methods of eradicating, repelling or preventing infestations of pests, including such pests as insects, mites, ova, fungus, or parasites. The methods comprise the steps of preparing a pesticidal compound, combining it with a carrier, and applying it to the affected area.

This disclosure provides pharmaceutical compositions which include oil extract from plants from the Labiatae family. In particular, the compositions can be formulated by combining extracts of essential oils from plants of the Labiatae family with an organic acid or a Group I salt. It is believed that the antimicrobial activity of the pharmaceutical composition is due to the presence of organic phenols, such as isopropyl-o-cresol, in the oil extract from the plants.

The invention includes a pesticidal compound comprising at least one organic phenolic compound and at least one salt comprising a divalent cation. Preferably, the organic phenolic compound is chosen from Carvacrol, thymol or combinations thereof; and is derived from a natural source, preferably extracted from a member of the family Labiatae or Verbenacea. Preferably the divalent cation is a transition metal salt and more preferably is zinc chloride or zinc sulfate. The invention also includes methods of eradicating, repelling or preventing infestations of pests, including such pests as insects, mites, ova, fungus, or parasites. The methods comprise the steps of preparing a pesticidal compound, combining it with a carrier, and applying it to the affected area.

This disclosure provides pharmaceutical compositions which include oil extract from plants from the Labiatae family. In particular, the compositions can be formulated by combining extracts of essential oils from plants of the Labiatae family with an organic acid or a Group I salt. It is believed that the antimicrobial activity of the pharmaceutical composition is due to the presence of organic phenols, such as isopropyl-o-cresol, in the oil extract from the plants.