The spread of field horsetail (Equisetum arvense L.) in drained areas of Lithuania: Reasons and consequences, and possibilities for its control

Abstract

The blockage of drainage tiles by field horsetail roots is one of the most frequent causes of drainage failure in Lithuania. The frequency of drainage failure has increased over time. Favourable agrochemical conditions of soils in drainage trench backfill are important factors in determining field horsetail prevalence. Mechanical and chemical means are used to control the growth of horsetail in drained areas. The influence of horsetail weeding, soil liming and the effect of herbicides (Roundup Classic and Dialen 400 SL) on horsetail root systems were investigated. Quantitative root indices were reduced most by soil liming and intensive weeding of field horsetail. Applied herbicides reduced field horsetail root density by an average of 38%.