THE EFFECT OF GIBBERELLIN AND OTHER BIOLOGICALLY ACTIVE SUBSTANCES ON POTATO VIRUSES,

摘要

Conclusions:Treatment of potato plants in the budding stage with a solution of gibberellin,in particular gibberellin mixed with heteroauxin,retards the spread of virus infections. On the basis of serological analyses it was established that the number of plants affected with the viruses of rugose mosaic had not increased by the end of the vegetative period. Gibberellin in a concentration of 25100mg/1,as well as gibberellin mixed with heteroauxin,is good prophylaxis against potato viruses and favors the increase in tuber yield and starch content during the year in which it is used and also has the same aftereffect. The other biologically active substances tested had a certain negative effect on the viruses,but did not influence the productivity of the potatoes. The preparation cansatin exerted no effect on the virus or the potato yield. (Author)