A Method of and Means for Preserving Plants from Destructive Parasites.
Year: 1892

page_text: Date of Application, 29th June, 1892
Complete Specification Left, 18th Mar., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
A Method of and Means for Preserving Plants from Destructive
Parasites.
We, IVAR AXEL FERDINAND BANG Chemist and MARIE CHARLES ALFRED
RUFFIN Gentleman both of 18 Avenue d'Antin, Paris, France, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to means of preserving plants, such as potatoes or other
vegetables, vines, fruit or other trees or bushes from destructive vegetable or animal
parasites. We effect this by applying to the plants by watering or in any other
convenient manner a soluble composition of alpha or beta-naphthol, using by pre-
ference, on account of cheapness, beta naphthol which is largely produced in the
manufacture of colouring matters. We compound the naphthol with soda or potash,
by fusing the naphthol, adding caustic soda or potash and cooling the mixture,
which crystallises in large flakes. The proportions which we adopt are 10 parts
by weight of naphthol to 10 parts of soda lye at 40° B. or 15 parts of potash. The
compound, if protected from moisture, will keep for any period, but it is very
soluble in water.
A solution containing about 1 per cent. is of sufficient strength for watering
plants. The compound may however be applied to roots in the form of powder.
Dated this 28th day of June 1892.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
A Method of and Means for Preserving Plants from Destructive
Parasites.
We, IVAR AXEL FERDINAND BANG, Chemist and MARIE CHARLES ALfred
RUFFIN Gentleman, both of 18 Avenue d'Antin, Paris, France, do hereby declare
the nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
:-
Our invention relates to means of preserving plants from organic parasites
which cause almost all the diseases of plants. We effect this by applying either
of the two isomers of naphthol CH'OH'. We may use either alpha or beta
naphthol, or their mixture, using by preference, on account of cheapness, beta
naphthol which is largely produced in the manufacture of colouring matters.
We apply the naphthol preferably in solution in combination with an alkali. This
combination has the advantage of being readily soluble in cold water, and although
it has a slightly alkaline reaction it does not injure the tissues of the plants.
For convenience of transport we preferably prepare the compound in a dry
condition.
We compound the naphthol with caustic soda or potash, by fusing the naphthol,
adding caustic soda or potash which immediately combines with it evolving heat
and we pour the mixture into moulds where it crystallises in large flakes. The
proportions which we find suitable are 10 parts by weight of naphthol to 10 parts of
soda lye at 40° B. or 15 parts of potash. The compound, if protected from moisture,
will keep for any period owing to a layer of carbonate formed on its surface but it
is very soluble in water, giving a clear solution.
A solution containing about 1 per cent, is of sufficient strength for vines. The
compound may however be applied at various degrees of strength, by watering with
the solution.

page_text: After the watering the carbonic acid of the air combines with the alkali and the
naphthol which has a slightly acid reaction is precipitated on the plant where,
being almost insoluble, it protects for a long time the parts where it is deposited.
Naphthol might obviously be applied in other ways; thus where water is scarce or
where roots have to be treated it may be applied in form of powder.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The use of alpha or beta naphthol or their mixture either dry or in solution
for protecting plants from destructive parasites substantially as described.
2. The use for the purpose above referred to of sodium or potassium naph-
tholate.
Dated this 18th day of March 1895.
ABEL & IMRAY,
Agents for the Applicants.
ABEL & IMRAY,
Agents for the Applicants.