ALLELOPATHY EFFECT OF STRAGGLER DAISY (AN EMERGING AGGRESSIVE INVASIVE WEED) ON ITS ASSOCIATED FLORA
*Kavitha Sagar
Abstract
Root, stem and leaves extracts of stragler daisy (Calyptocarpus vialis
Less.) were prepared in water, ethyl acetate, methanol and chloroform
in order to study the allelopathy effects on beggar’s ticker (Bidens
pilosa) and cinderella weed (Synedrella vialis). Different
concentrations viz., 1%, 2%, 4%, 6%, 8%, 10% and 12% were
prepared for the study. Even at low concentrations i.e. 1 and 2% of
straggler daisy also there was very meager rate of germination noticed
in both the plant species. At higher concentrations i.e. 4%, 6%, 8%,
10% and 12% there were nil rather only one or two seeds were seen
with very short radical at the end of two weeks study. This clearly reveals the strong
allelopathy effects of aqueous root and leaves extracts of C. vialis on B. pilosa and S.
nodiflora. Further, it is suggested that more emphasis has to be done on cost effective control
measures of this emerging and aggressive herbaceous weed. Avenues of future research may
be usage of herbicides with mixture of molecular targeting components, which may definitely
inhibit the growth of straggler daisy and thus prevent the loss of native herbaceous flora.
Keywords: Allelopathy, straggler daisy, Beggar’s ticker, Cinderella weed.
[Full Text Article]