Lecture 5 Classification of Weeds
Lecture 5 Classifications of Weeds 1. Classification on the based-on life cycle A. Annual weed ( एक वर्षीय खरपतवार ) ü Weeds that live only for a season or a year and complete their life cycle in that season or year are called as annual weeds. ü These are small herbs with shallow roots and weak stem. Produces seeds in profusion and the mode of propagation is commonly through seeds. Ø Kharif Season Commelina benghalensis, Boerhavia erecta, Trianthema monogyna, Solanam nigram, Amaranthus viridis Ø Rabi Season Chenopodium album, Anagalis arvensis, chinopdium murale, Asphodelus tenuifolius, Phalaris miner B. Biennials Weeds ü It completes the vegetative growth in the first season, flower and set seeds in the succeeding season and then dies. ü These are found mainly in non-cropped areas. Eg Daucus carota, Fumaria parviflora . C. Perennials Weeds ü Perennia...