All exotic and introduced plants are not bad, but you have to be selective. Plants which have introduced for flowers and planted in the garden , mostly are worthy of preservation. But large scale plantations such as of Eucalyptus, or Acacia auriculoformis, Cryptomeria japonica have done havoc to our ecology. Most dangerous are the weeds as Mikania, Lantana, Parthenium, Eichornia etc.. The weeds spread very rapidly in new environment as they do not have their predators or competitors as they have in their native place. Moreover, most of the weeds , their roots secrete a special chemical, generally catechin, which does not allow other plants to grow nearby- what is known as allelopathy. Some years back there was an article on invading exotic plants in the National Geographic, but just now I can not recall the year and number.
On Nov 2, 1:45 pm, Yogesh Pathak <[EMAIL PROTECTED]> wrote: > Hello all, > > I think in the campaign to reduce non-native trees and grow natives, > its quite important for the common man to know which trees are non- > natives. Does anyone here have a list of these destructive, self- > multiplying non-natives, ideally along with pictures (say close-ups of > leaves for identification). > > Such lists / leaflets should be distributed en masse to schools, > housing societies etc, so that they don't blindly plant the non- > natives. We see such planting happening practically everywhere in our > urban areas. > > Thanks, > Yogesh --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "indiantreepix" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.co.in/group/indiantreepix?hl=en -~----------~----~----~----~------~----~------~--~---
