殺草劑對蘿蔔生長及雜草之影響

Effect of Herbicides on Weed and Radish Growth

本試驗目的，乃使用七種萌前殺草劑，探討對蘿蔔生長及雜草控制效果，以篩選出最適當的葉劑。試驗結果以理有龍及普拔根對蘿蔔產生嚴重藥害，比達寧，施行圃與大芬減對蘿蔔不產生藥害對蘿蔔生育與產量亦無影響。但復錄芬與藥量拉草則有銷重藥害出現。七種藥劑中，以復錄芬，理有龍及普拔根之雜草防險效能最佳，可以防除大部分一年生的雜草，其次為施得圃、拉草及比達寧。不除草對蘿蔔產量可導致80%之減少。綜合試驗結果，施行圃與比達寧為蘿蔔田較適當與安全的萌前殺草劑。

Seven herbicides, A-820, diphenamide, oxyfluorfen, alachlor, linuron, propazine and pendimethalin were applied in radish field to test the efficency of controlling annual weeds. The results indicated that radish was seriously injured by linuron and propazine. A-820 diphenamide, pendimethalin caused no crop injury and radish yield was similar or even better than the hand weeding plot. Alachlor at the rate of 1.72Kg ai/ha have slightly injury to radish. Oxyfluorfen applied preemergence at 0.24 or 0.35 Kg ai/ha were effective against annual weed, but have 19% and 35% injury rating respectively. Among seven herbicides, oxyfluorfen, linuron and propazine controlled most annual weeds effectively. The uncontrolled weed growth caused the highest reduction in radish yield (80%). Stomp and A-820 were most suitable herbicides for the annual weed control on radish field.