Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract Full Text

Control and resprout capacity of the tree of heaven (Ailanthus altissima).

Abstract

Tree of heaven (Ailanthus altissima) is considered a non-native invasive species in Spain. Chemical control tests have been done using the stem injection technique. In autumn, with two doses of Triclopyr (48%) in diameters smaller than 3 cm, the death of all treated individuals was observed, although outbreaks connected to them were not affected; Two doses of Clopyralid (72%) carried out a control of 100% and 96% respectively. In the spring, with four doses of Triclopyr (48%) and Clopyralid (72%) separately, greater control was obtained at a higher concentration. Injections to cut stumps with vinegar, detergent and a surfactant showed no control over the treated individuals. Rhizome fragments of 5 cm length and a diameter of 3-4 mm were able to sprout. Fragments of 7 cm length and a diameter of 7-8 mm generated shoots and roots.