Comparison of traditional and integrated weed control practices in upland rice [Oryza sativa] (Philippines)

• Main Authors: Munroe, C.E, Samiano, A.R, O'Brien, D.T
• Format: Conference Proceeding
• Language: English
• Published: College, Laguna (Philippines) 1981
• Subjects: ARROZ DE SECANO; CONTROL DE MALEZAS; FILIPINAS; LUTTE ANTI-MAUVAISE HERBE; PHILIPPINES; RESISTANCE A LA SECHERESSE; RESISTENCIA A LA SEQUIA; RIZ DE MONTAGNE

One trial, comparing farmers' weed control practices and integrated weed control practices in upland rice variety UPL-Ri-5 was conducted at five locations in the provinces of Batangas and Camarines Sur during the 1980 wet season. Treatments consisted of weedy and weed free checks, butachlor at 2.0 kg a.i./ha and 1.0 kg a.i./ha plus one handweeding, and the farmer's practice. The higher rate of butachlor without handweeding reduced populations of grass species including Echinochloa colona but resulted in a weed population shift towards broadleaf species, mainly Celosia argentia and Ipomoea triloba, at most locations, yields were not significantly higher than the weedy check. Although weed counts taken prior to handweeding showed no significant difference in the weed populations of the butachlor plots at most locations, butachlor at 2.0 kg/ha reduced the time required for handweeding from one-third to almost one-half as compared to butachlor applied at 1.0 kg/ha. It appears that yields approaching 4.0 tons per hectare can be achieved when using labor intensive weed control practice of several cultivations and handweedings