Study of weed infestation in tоbacco felds in some regions of Sough Bulgaria

Marin Yanev

Abstract: During the period 2012 – 2013 was conducted research of weed infestation on 2 varieties of flue cured tobacco in the area of municipalities Parvomai and Stara Zagora. 24 species of weeds from 5 biological groups have been identifed. Late spring weeds dominate – total of 17 species. Of these, the most commonly found Chenopodium album L., followed by Hibiscus trionum L. Biennial weeds are
represented by one species. Of the perennial weeds are established six types: 2 – rhizome, 2 – root sucker and 2 types with fusiform root. During the period 2013 – 2014, was conducted research of weed infestation on 4 varieties of Oriental tobacco in the region of municipalities Harmanli, Kardzhali, Momchilgrad, Ajtos and Rouen. Eighteen species of weeds from three biological groups are established. Late spring weeds dominate – total of 12 species. Of these, the most commonly found Portulaca oleraceae L., followed by Chenopodium album L. From perennial weeds are established six species of them – 2 are rhizome and 4 are root sucker weeds. The survey showed that the overwhelming weed infestation in both types of tobacco is of the group of the late spring weeds. Species diversity of weeds at flue cured tobacco is greater than that of oriental tobacco.

Keywords: spread; survey; tobacco; weeds

Date published: 2017-08-09