Current situation with invasiveErigeron annuus(l.) Pers. (daisy fleabane) in the Republic of Macedonia

Abstract

Detailed surveys of populations of Erigeron annuus (L.) Pers., an invasive plant species native to Eastern North America, were made in three locations in north‐western, northern and eastern parts of the Republic of Macedonia. The population densities were not quantified, but several stands of different sizes were found. A rapid ecological risk assessment, mainly based on knowledge of invasion histories in South‐Eastern and Central European countries, showed that this species is a serious threat to Macedonian biodiversity, particularly in the north‐western part, where monospecific stands of E. annuus were recorded. Biological invasions of E. annuus affect biodiversity worldwide through its rapid growth and high seed production, phenotypic plasticity in the native range with regard to the availability of soil nutrients and release of compounds to the soil over the period of plant growth. Consequently, invaded ecosystems suffer from significant loss in economic and cultural value.

Local Aphid Species Infestation on Invasive Weeds Affects Virus Infection of Nearest Crops Under Different Management Systems – A Preliminary Study

“…These species are known to grow in a diverse range of habitats and are considered important weeds in Europe, causing substantial crop losses following colonisation of new areas (Anastasiu and Negrean, 2005). Erigeron annua is often a dominant species within invasive weed communities, and has been reported from almost all European countries, its expansion increasing over recent years (Edwards et al, 2006;Tunaitienė et al, 2015;Pacanoski, 2017). Erigeron canadensis is an annual plant native throughout most of North and Central America.…”

“…mulching, tilling, burning) and chemical and other control (e.g. use of high quality seeds, crop rotation, herbicide application) ( Chitsaz and Nelson, 1983 ; Rand and Louda, 2004 ; Uchino et al, 2012 ; Mabuza et al, 2013 ), the net areas covered by invasive weed species continues to increase in Central European regions ( Tunaitienė et al, 2015 ; Pacanoski, 2017 ).…”

Low and high input agricultural fields have different effects on pest aphid abundance via different invasive alien weed species

“…In the last 25 years, 435 alien weed species from 82 families have been reported from Central Europe (Anastasiu and Negrean 2005). Although weed management strategies involve different methods, including physical (mulching, tilling, burning), chemical and cultural control (high quality seeds, rotate crop, species, herbicide) (Chitsaz and Nelson 1983;Rand and Louda 2004;Uchino et al 2012;Mabuza et al 2013), the areas covered by invasive weed species are still increasing (Tunaitienė et al 2015;Pacanoski 2017). Another important factor that is rarely considered is the effect of these invasive weeds on local sap-feeding pest insect populations such as aphids (Hemiptera, Aphididae) and the influence of the invasive weeds on neighbouring crop plants via aphids (through damage and virus transmission).…”

“…These species are known to use a diverse range of habitats and are considered economically important weeds in Europe (Anastasiu and Negrean 2005). Stenactis annua is often a dominant species within the invasive weed communities, and has been reported from almost all European countries, its expansion showing an increase (Edwards et al 2006;Tunaitienė et al 2015;Pacanoski 2017). Erigeon canadensis is an annual plant native throughout most of North and Central America.…”

Total Phenolic Content and Antioxidant Activities of Invasive Erigeron annuus Pers. (Asteraceae) from Different Localities

“…More importantly, the species is on the 150 most widespread weed list in Europe. Besides, the plant is one of the most dangerous species in Serbia, Hungary, and Slovakia with rapid development and phenotypic flexibility of the species (Pacanoski, 2017). Furthermore, E. annuus is a lead accumulator (Bi et al, 2005) and might be the other reason for the invasive trait of the plant.…”