A közlemény az Orobanche reticulata néhány új magyarországi adatáról számol be. fajt a szakirodalomban ismeretlen gazdanövényről, Carduus hamulosus-ról gyűjtöttük Keleti-Bakonyban, Bér-hegyen. Magyarországon általában májustól júliusig virágzó faj életmenetéhez érdekes adalék egy extrém csapadékos év (2010) enyhe őszén megfigyelt késői, októberi virágzása is. Egy másik populáció (Vértes hegység...

Landscape change has great, yet infrequently measured, potential to influence the susceptibility of natural systems to invasive species impacts. We quantified attack by an invasive biological control weevil (Rhinocyllus conicus) on native thistles in relation to two types of landscape change: agricultural intensification and invasion by an exotic thistle, Carduus nutans, the original target of ...

Theory predicts that damage by a shared herbivore to a secondary host plant species may either be higher or lower in the vicinity of a preferred host plant species. To evaluate the importance of ecological factors, such as host plant proximity and density, in determining the direction and strength of such herbivore-mediated indirect effects, we quantified oviposition by the exotic weevil Rhinoc...

Musk thistle is an invasive weed that is widely distributed throughout much of North America, including grasslands in temperate climates of the midwest USA. A series of laboratory and greenhouse experiments were conducted to determine the effect of various environmental factors on germination of musk thistle seeds. In temperature-fluctuation experiments, seed germination was greater than 65% in...

19 The negative correlation between dispersal and establishment appears to be well documented 20 in the plant literature; smaller seeds tend to disperse better but germinate less well, and 21 produce smaller seedlings. However, because dispersal capacity is often quantified using 22 proxies, such as the settling velocity of wind-dispersed seeds, little is known about the exact 23 shape of this ...