THE POSSIBILITY OF CHANGING THE FROST RESISTANCE OF FRUIT TREES BY DODECYL ETHER OF POLYETHYLENE GLYCOL (DEPEG) AND PP333 SPRAYS

T. Holubowicz
Application of 1 % DEPEG solution sprays exerted a positive effect on the cold resistance of treated plants. This was especially evident when the treatment was given at the end of September and beginning of October. However, the effect of DEPEG sprays was of a short duration and it varied from year to year. On the other hand the observations on the recovery of the injured trees after 1978/1979 winter had shown a beneficial effect of sprays given on October 13 on regrowth of the tree crown in 1979 season.

Foliar application of pp333 at the conc. of 1000 ppm at the end of September or beginning of October resulted in the acceleration of acclimatizationas well as in the increase of tree hardiness in the late autumn. This chemical also delayed the late winter or early spring dehardening of shoots.

Holubowicz, T. (1983). THE POSSIBILITY OF CHANGING THE FROST RESISTANCE OF FRUIT TREES BY DODECYL ETHER OF POLYETHYLENE GLYCOL (DEPEG) AND PP333 SPRAYS. Acta Hortic. 137, 117-124
DOI: 10.17660/ActaHortic.1983.137.12
https://doi.org/10.17660/ActaHortic.1983.137.12

Acta Horticulturae