Yale University New Haven, Connecticut 06511

School of Forestry and

Environmental Studies

THE EFFECT OF ROOTS® ON SPROUTING OF POPLAR (Populus deltoides)

CUTTINGS DIPPED BEFORE PLANTING

INTRODUCTION

A greenhouse rooting test was performed at the Yale School of

Forestry, New Haven, CT to evaluate the effects of ROOTS®, Root Growth 
Enhancer, a new root growth biostimulant, on the rooting of poplar.

MATERIALS AND METHODS

In October 31, 1990, stems of one-year old growth of Populus deltoides 
were and placed in cold storage (5°C:) at the Yale School of Forestry. In 
November 24, 1990 they were cut in 112 cuttings of 24 cm length each one and 
planted in 2 litre pots, one cutting per pot.

Prior to planting, fifty six cuttings were dipped in a 2% solution of 
ROOTS® for 10 minutes; and the other fifty six were dipped in tap water, 
acting as the control. No rooting hormone was used on these cuttings.

RESULTS

Ten days after planting the treated cuttings started to sprout first. At 
sixty days, 89% of the dipped cuttings had sprouted against only 55% of the 
control. Although the experiment is still not finished, it is evident that the 
sprouting in the treated cuttings have better appearance and looks greener.