Fruit-Growing Institute, EG- 4004 Plovdiv, Bulgaria
RANKOVA, Z., 2006. Effect of some soil herbicides on the vegetative habits of Mahaleb cherry (Prunus mahaleb L.) seedling rootstocks. Bulg. J. Agric. Sci., 12: 429-433
In 2001 - 2003 at the Fruit-Growing Institute - Plovdiv a field experiment was carried out on alluvial-meadow soil (Fluvisol) for studying the effect of the soil herbicides napropamid, pendimethalin, terbacil and metolachlore on the vegetative habits of Mahaleb cherry seedling rootstocks.
During the period of vegetation observations were carried out on plant growth and development - emergence and external symptoms of toxicity. In October the rootstock quality was determined reporting the following biometric indices: width in the grafting zone (mm), stem height (h-cm) and aboveground mass (g).
The results obtained showed that napropamid - Devrinol 4 F - 400-500 ml/da, pendimethalin - Stomp 33 EC - 400 ml/da and metolachlore - Dual Gold 960 EC -150 ml/da could be applied in the production of Mahaleb cherry seedling rootstocks.
The soil herbicide terbacil (Sinbar 80 WP) had a strong toxic effect on the development of Mahaleb cherry seedlings causing their death.
The inhibiting effect of the soil herbicide metolachlore was expressed after the application of the highest rate of Dual Gold 960 EC -187.5 ml/da.