Eszakmagyarorszagi Vegyimuvek

Tibor Farkas

Laszlo Vigh

Zsolt Dombay

Jozsef Nagy

Istvan Toth

Erzsebet Grega Nee Toth

Gyula Tarpai

Csaba Pavliscsak

Laszlo I Horvath

Emilia Nagy Nee Gera

Ferenc Foglein

Aniko Nagy Nee Vanicsek

Annamaria Meszaros

Disclosed is a process for improving the efficiency of in vitro propagation and tissue cultivating by tissue culture of cultivated of plants which comprises treating the plants during micropropagation and/or subsequent planting with an aqueous solution of one or a mixture of substituted amides or one or a mixture of substituted diamides.

Plant tissue cultivation process

The invention relates to a plant growth regulating composition which contains as active agent a compound of general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 can be identical or different and can stand for hydrogen, a C.sub.1-4 straight or branched alkyl group, cyclohexyl, phenyl, chlorophenyl, alkylphenyl, benzyl or alkylbenzyl group, or R.sub.1 and R.sub.2 can together with the N atoms form a heterocyclic ring. The growing of plants can be stimulated and the green weight can be increased to a significant degree by the treatment carried out with the composition of the invention.

Plant growth regulating method

The invention relates to new compositions for increasing the cold resistance of cultivated plants. These compositions contain as active ingredient at least one compound of the general formula (I), ##STR1## wherein n is an integer of 2 to 5 and R.sub.1, R.sub.2 and R.sub.3 each stand for hydrogen or C.sub.1-5 alkyl, or an acid addition salt thereof in an amount of 0.01 to 70% by weight, together with a conventional diluent and/or additive. The plants treated with the compositions according to the invention are more resistant to cold and frost.

Compositions for increasing the cold resistance of cultivated plants and

Growing community of inventors

Szeged, Hungary

Tibor Farkas