Optimum Timing for Weed Control in Cassava

Abstract

Timing of weed control in cassava which was planted in rainy season was studied at Sriracha Research Station, Cholburi. Cassava was planted in July, 1986. Timings of first weeding and consequence of weed free were begun at 15, 30, 45, 60, 75, 90, 105 and 120 days after planting. In addition, initial weed free at 15, 30, 45, 60, 75, 90, 105 and 120 days after planting were included in the experiment. Weed control throughout the season and no weed control were added as check treatments. Yield of cassava was decreased by 87% in no weeding treatment in comparison with weeding. First weeding at 15 days and duration of weed free for 60 days after planting gave the yield similar to weeding throughout the season. Root starch content of the no weed control plot was higher than from the weed control plot, but the yield was lower in the nonweeding one resulted to lower starch yield than the weed control plot.