Insect-mediated indirect interactions between native plant species recently have been shown to be important determinants of plant performance in a number of ecological communities. However, the potential indirect effects of exotic plant invasion on native plant species are not well understood. We examined whether the presence or proximity of the targeted exotic weed, musk thistle, influences th...

Perennial weeds, including Cirsium arvense and Sonchus arvensis, are a common problem in crop fields, especially in agricultural systems with reduced herbicide usage. Herbicides recommended for control of these perennials generally are restricted to only a few active ingredients that tend to have low selectivity, especially on dicot crops. Microbial phytotoxins or their synthetic analogues may ...

Abstract We examined populations of North Apennine stenoendemics Cirsium bertolonii in the Apuan Alps and Tuscan-Emilian Apennines found individuals morphologically shifted to co-occurring C. acaulon or erisithales . Hybrid status these intermediates was confirmed by flow cytometry, morphometrics amplified fragment length polymorphism (AFLP). interpreted hybrids taxonomically as × sagrense ( ) ...

Cnicus wallichi DC belonging to the family Asteraceae (Compositae) commonly known as Indian thistle and cirsium wallichi. It is an important medicinal plant indigenous to Nilgiris, Tamilnadu, South India. Since the related species Cnicus benedictus was reported for its anti cancer activities, In vitro screening studies for antitumour activities were carried out for different extracts of Cnicus ...

Ten wet grassland species were fumigated with four concentrations of ozone (charcoal-filtered air, non-filtered air and non-filtered air plus 25 or 50 nl l(-1) ozone) in open-top chambers during one growing season to investigate the long-term effect of this air pollutant on various growth variables. Only Eupatorium cannabinum showed ozone-related foliar injury, while five species reacted with s...