Patent GB-486707-A (GB)
Title: Improvements in or relating to combating noxious organisms on plants
IPC: A01N41/02
Filed: 1937-08-27
Abstract: Preparations for treating noxious organisms on plants, e.g botrytis of tulips, are made by dispersing heavy metal, particularly copper, salts of higher molecular sulphuric acid esters (i.e. having 6 or more C. atoms) in water, alone, or with other insecticidal or fungicidal substances.  Mercury, lead and cobalt salts are also suitable; the salts form highly dispersed colloidal solutions.  The esters from which the salts are prepared are made by reacting alcohols, or olefines, with sulphuric acid under sulphating conditions and the heavy metal salts thereof may be obtained, e.g. by reacting an excess of an alkali salt such as monocetyl sulphate with a heavy metal salt such as copper sulphate.  Acid esters suitable for the purpose may also be obtained by cracking paraffin wax, isolating olefines having 12-18 C. atoms, and treating them with sulphuric acid in the cold.  Agents according to the invention may be prepared locally, from a dry mixture of a heavy metal salt and an acid sulphuric acid ester or an alkali salt thereof, by the addition of water. Other agents such as pyrethrum, nicotine, sulphur compounds and wetting agents may be added to the preparations.ALSO:Preparations for treating noxious organisms on plants, e.g botrytis of tulips, are made by dispersing heavy metal, particularly copper salts of higher molecular sulphuric acid esters (i.e. having 6 or more C. atoms) in water, alone, or with other insecticidal or fungicidal substances. Mercury, lead and cobalt salts are also suitable; the salts form highly dispersed colloidal solutions.  The esters from which the salts are prepared are made by reacting alcohols, or olefines, with sulphuric acid under sulphating conditions and the heavy metal salts thereof may be obtained, e.g. by reacting an excess of an alkali salt such as monocetyl sulphate with a heavy metal salt such as copper sulphate.  Acid esters suitable for the purpose may also be obtained by cracking paraffin wax, isolating olefines having 12-18 DEG  C. atoms, and treating them with sulphuric acid in the cold.  Agents according to the invention may be prepared locally, from a dry mixture of a heavy metal salt and an acid sulphuric acid ester or an alkali salt thereof, by the addition of water. Other agents such as pyrethrum, nicotine, sulphur compounds and wetting agents may be added to the preparations.ALSO:Preparations for treating noxious organisms on plants, e.g botrytis of tulips, are made by dispersing heavy metal, particularly copper, salts of higher molecular sulphuric acid esters (i.e. having 6 or more C. atoms) in water, alone, or with other insecticidal or fungicidal substances.  Mercury, lead and cobalt salts are also suitable; the salts form highly dispersed colloidal solutions.  The esters from which the salts are prepared are made by reacting alcohols, or olefines, with sulphuric acid under sulphating conditions and the heavy metal salts thereof may be obtained e.g. by reacting an excess of an alkali salt such as monocetyl sulphate with a heavy metal salt such as copper sulphate. Acid esters suitable for the purpose may also be obtained by cracking paraffin wax, isolating olefines having 12-18 C. atoms, and treating them with sulphuric acid in the cold.  Agents according to the invention may be prepared locally, from a dry mixture of a heavy metal salt and an acid sulphuric acid ester or an alkali salt thereof, by the addition of water. Other agents such as pyrethrum, nicotine, sulphur compounds and wetting agents may be added to the preparations.