Myth. Jatropha is not a weed.

Fact. Jatropha holds a status of weed in many countries including
Australia. The research is in progress to manage this weed through
different methods including weedicides. Crop protection compendium
pulbished by CABI, UK gives much scientific information regarding its
weedy nature and economical losses caused by it in different
countries. Ignoring these scientific facts many countries including
India are permitting plantation of this weedy species in thousands of
hactares.

RISK ASSESSMENT RESULTS: Reject, Score: 11
http://hear.org/pier/wra/australia/jacur-wra.htm