Authors : S. T. Kamble and K. B. Pawar
Page Nos : 220-224
Description :
Phytosociological analysis with respect to percent frequency, density, abundance and their relative values of an invasive weed Alternanthera tenella Colla was carried out from agricultural fields of the village Asurle (Tahsil Panhala, District Kolhapur) during the period September, 2015 to August, 2016. Values for density and abundance were higher (6.65 per m2) in the month of September and values of same were lowest (0.47 per m2 and 1.8 per m2) in the month of May and June respectively. The percent frequency of the weed was constant (95-100%) from September to February and a sharp decrease (30-40%) was observed in the month of May and June. The data was correlated with data on climatic conditions such as temperature, moisture, sunshine and rainfall. Such type phytosociological study may give an idea about distribution pattern of the invasive weed in agricultural fields of Asurle as well as its relationship with crops and environmental factors. An attempt was made to study the effect of petal leachates (5%, 10% and 20% concentrations) of Gliricidia sepium and Cassia fistula on germination and growth of A. tenella and found inhibition of seed germination and seedling growth. In petriplate bioassay seed germination was inhibited due to petal leachates at 24, 48 and 72 hours. Seedling growth with respect to root length and shoot length was reduced by the treatment of petal leachates in both petriplate and soil bioassays.
Key words: Agricultural fields, Alternanthera tenella, Petal leachates, Phytosociological analysis
