Ambrosia artemisiifolia is a quarantine-organisme in Switzerland, which has to be combated compulsary since 2006. For animal feed, a critical value of 10 seeds of ambrosia per kilogram is tolerated. The quality improvement of feed for birds and small animals has led to a considerable decrease of...

Successful biological control can significantly reduce the competitive ability and population density and/or distribution of an invasive weed. However, in some cases the target weed is replaced by other nonnative weeds. If this "invasive treadmill effect" occurs, the biodiversity of the site will...

Non-native, invasive perennial grasses have not been widely targeted for classical biological control with insects, despite their global prevalence and damaging effects, in part because of a perceived paucity of host-specific insect herbivores. Armored scales (Hemiptera: Diaspididae) have not been...

Many species of African grasses were introduced into Australia and the USA to improve the quality and biomass of green pastures for domestic livestock. However, a range of non-target environmental impacts eventuated from these introductions, including spatial displacement of indigenous ecosystems,...

This contribution is not intended to cover all plant species that today affect the economy of the countries, but to emphasize those that are real problems in various regions of the world, whose introduction or spread should be avoided in those countries/regions where they do not exist. The ratio of ...

Objective: The study was performed to investigate the occurrence and damage of alien invasive weeds in Guangxi agricultural ecosystem in order to provide references for their risk assessment and further prevention and control. Method: Based on field investigations and related literatures,...

This paper presents the initial research of the weed flora of cultivated fields in Bjelopavlići plain, which is the largest strip of fertile land in Montenegro. The research was launched with the aim to examine the floristic composition, structure, seasonal dynamics and biological spectrum of weed...

Large fires (>2000 ha) have increased in western North American deserts since the mid-1980s, with local and regional impacts on soil erosion, vegetation communities, and winter snowpacks in adjoining mountain regions. The trend of increased fires is expected to continue under climate change...

All deliberately or accidentally transferred weed species from their natural habitats into new ecosystems, where in the process of competition they repress native ones by invading their areas are considered as invasive species. This definition could be accepted as relative, for all introduced weed ...

Field studies were conducted in Romania, in 2008, to determine some biological control agents of Lepidium draba under field conditions. The treatments comprised 6 blocks of 16 × 32 m each. Within each block, one plot was harrowed, another plot was also harrowed and sown with a mixture of grass...