It is estimated that some 200 million people worldwide use illicit drugs. Most of these drugs
have natural origins, such as cannabis, cocaine, and the opiates; however, the synthetic …

Exotic annual grasses are a major challenge to successful restoration in temperate and
Mediterranean climates. Experiments to restore abandoned agricultural fields from exotic …

The continued spread of invasive weeds is threatening ecosystem health throughout North
America. Understanding the relationships between invasive weeds' key phenological …

Invasive plants can increase soil nitrogen (N) pools and accelerate soil N cycling rates, but
their effect on gross N cycling and nitrous oxide (N2O) emissions has rarely been studied …

Perennial pepperweed is an invasive noxious weed spreading rapidly throughout a wide
range of habitats in the western United States. Shoots form dense monotypic stands with …

Weeds limit hazelnut productivity through competition and interference. Field experiments
were conducted from spring 2010 through 2013 to evaluate string trimming alone or …

Across many southern regions of Australia, native grasslands have become seriously
threatened by human activity, with only a fraction of the original areas remaining …

The invasive yellow bluestem (Bothriochloa ischaemum [L.] Keng) threatens native
biodiversity, and its control is of interest to land managers involved in restoration of invaded …

Perennial pepperweed (Lepidium latifolium) is a potential threat to biodiversity and
ecosystem function in the communities that it invades. The mechanism for its successful …

This report was prepared for the Inter-American Drug Abuse Control Commission (CICAD)
section of the Organization of American States (OAS) in response to requests from the …