Integrated weed management practices for sugarcane

Nierves et al. ((SRA-LGAREC) evaluated the different integrated weed management practices in sugarcane ratoon by using the Randomized Complete Block Design (RCBD) from November 1`999 to May 2000. They also identified the most effective weed management practices during WS and DS planting.

Findings

  • During the WS planting, sugarcane plants, under the treatment using late post-emergence spray in combination with manual weeding and plow cultivation, gave cane tonnage and sugar yield of 71.46 TC/ha and 159.08 L kg/ha; respectively. This treatment also gave the highest net income of P54,537.32. The result is comparable with that of plants under treatments of blanket weeding + plow cultivation (59.55 TC/ha and 135.25 L kg/ha); pre-emergence spray + manual weeding + plow cultivation (64.10 TC/ha and 144.78 Lkg/ha); and row weeding + plow cultivation (55.97 TC/ha and 128.03 Lkg/ha).
  • Plants under the treatment of early post-emergence spray + manual weeding + plow cultivation had similar cane tonnage and sugar yield of 63.37 TC/ha and 158.10 Lkg/ha, respectively with the other weed management practices. A net income of P51,723.00 was obtained from this treatment during dry season planting.
  • In the ratoon crop, cost of weeding operations during WS was higher than that incurred during dry season planting. This was attributed to the rapid growth of weeds because of sufficient available water.
  • Based on direct agricultural cost, the use of late and early post-emergence spray in combination with manual weeding and plow cultivation resulted in plants yielding the highest cane tonnage and sugar during Ws and DS, respectively.
Source: PCARRD, 2004. Highlights 2003, Los BaƱos, Laguna.