Weed dynamics under semidry rice as influenced by integrated weed management

A field study was carried out during Kharif, 2019 at Agricultural Research Station, Rajendranagar, Hyderabad to study the effect of integrated weed management on weed dynamics under semidry rice. The associated weed flora in semidry rice includes Trianthema portulacastram, Parthenium hysterophorus, Alternanthera sessilis, Digera arvensis, Corchorus capsularis as broad leaved weeds; Echinocloa colona as grass; Cyperus rotundus as sedge. Pyrazosulfuron ethyl @ 20 g a.i ha-1 PE fb chlorimuron ethyl + metsulfuron methyl @ 4 g a.i ha-1 + fenoxaprop-p-ethyl @ 60 g a.i ha-1 PoE was found effective among all the herbicidal treatments in reducing weed density and dry matter with maximum grain yield and B:C ratio.