Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1997-09-24
2000-06-27
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504128, A01N 5700
Patent
active
060807008
DESCRIPTION:
BRIEF SUMMARY
A subject of the invention is a process for the regulation of plant growth, this process using ethephon.
It also relates to an ethephon-based composition for the regulation of plant growth.
It should be noted that ethephon, or 2-chloroethyl-phosphonic acid, is a plant growth regulator which is presented in the form of an acid grey solid, melting at about 74-75.degree. C.; its high solubility in water allows it to be handled more conveniently, without isolating it, in the form of a concentrated solution of about 1000 g/l.
It is presumed that its biological activity is linked to the emission of ethylene, outside and/or inside plants and to the fact that it probably triggers an endogenic emission of ethylene in the plant via a cascade effect. As a growth regulator, it can be used to provoke ripening of fruits and vegetables, to reduce the length of stems and straw of cereals, to encourage the axillary or apical budding of certain flowers and to increase the production of latex during the tapping of rubber plants.
Ethephon also encourages the early and uniform opening of ripe cotton boll and provokes the senescence of leaves or even their falling depending on the conditions of the medium, which facilitates harvesting.
Document GB-A-1 505 331 already discloses compositions comprising on one hand a compound providing ethylene and on the other hand a chelating agent.
Moreover, the prior art documents DD-A-237 253 and DD-A-139 063 disclose compositions comprising ethephon and a compound constituted by a hydrocarbonated chain having one carbon atom, bisubstituted by two phosphonic acid functions.
Within the scope of its research directed with a view to making better use of the biological properties of a compound constituted by a hydrocarbonated chain with one carbon atom, bisubstituted by two phosphonic acid functions.
Within the scope of its research directed with a view to making better use of the biological properties of ethephon, in other words obtaining quicker or more intense biological effects for a given quantity of active ingredient, the Applicants had the merit of discovering that this goal could unexpectedly and surprisingly be achieved when ethephon was used in a concomitant fashion with at least one of the substances of a group of products known until now for properties exhibited in technical fields as removed from agriculture as the fluidification of cements, softening and detergent treatment of textiles, the formation of chelating agents with multivalent metals or also the treatment of feed-water for boilers, the chemical structure of these products which can be conveniently designated by the term "adjuvants" being characterized by the presence of at least two acid functions chosen from the group containing acid functions of carboxylic type of formula (--COOH) and those of phosphonic type (--PO.sub.3 H.sub.2), at least one of these acid functions being the (--PO.sub.3 H.sub.2) function, these acid functions being connected by optionally substituted carbon chains defined hereafter.
It follows that the plant growth regulation process according to the invention is characterized in that on the plants to be treated there is used ethephon and at least one product, the chemical structure of which is characterized in that it contains at least two acid functions chosen from the group containing acid functions of carboxylic type of formula (--COOH) and those of phosphonic type (--PO.sub.3 H.sub.2), at least one of these acid functions being the (--PO.sub.3 H.sub.2) function, said product being selected from the group comprising ##STR1## and those in which the acid functions are connected by an organic chain of (--R--O--R) type containing an ether function and in which R represents a linear or branched hydrocarbon chain containing from 2 to 6 carbon atoms and optionally one or more substituents of hydroxyl type (--OH) and/or halogen and/or hydroxyethyl (--CH.sub.2 --CH.sub.2 --OH) and/or phenyl (--C.sub.6 H.sub.5) and/or hydroxyphenyt (--C.sub.6 H.sub.4 --OH), the two chains R can be identical to or different f
REFERENCES:
patent: 5145856 (1992-09-01), Clough et al.
patent: 5441713 (1995-08-01), Dublin et al.
Maillet Isabelle
Schapira Joseph
Schild Jacques
Vincent Jacques
Cfpi Agro
Clardy S. Mark
Pryor Alton
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