本省玉米田草相以禾本科之稗草、牛筋草及馬唐草最多，次為野莧、馬齒莧和飛揚草等其他闊葉草，至於霍香薊和加拿大蓬等菊科草在東部地區玉米田的發生頻度也很高。此外以藥效，玉米淨同化速率，相對生長速率、產量及產量成份篩選玉米田適用之殺草劑發現以tridiphane+草脫淨之效果最佳，次為草脫淨單獨使用，而EL107+草脫淨對甜玉米產量之影響與人工除草區無顯著差異。在藥劑選擇性上施得圃對禾本科草效果極佳，但對菊科草卻無法控制，至於其他藥劑在殺草範圍上大致相似，但各藥劑的殘效期長短不同導致殺草效果上的差別。

The most important weeds in corn field of Taiwan are Echi-nochloa crus-galli, Eleusine indica, Digitaria spp. Amaranthus uiridis, Portulaca oleracea and Euphorbia hirsa. In eastern Taiwan, Ageratum spp. and Erigeron canadensis also occurred frequently. The experimental results of herbicides screning showed tridiphane + atrazine at 0.5L =+1 kg/ha provided very good control of weeds in dent corn field, and atrazine at alone was effective, too. As to EL 107+atrazine at 0.4 + 1 kg/ha was only effective to control weeds in sweet cron field. Grasses were the most sensitive to pendime-thalin, however, weeds of compositae could not be controlled by it. Although other tested herbicides had the similar weed control effect as tridiphane + atrazine, but with the shorther residual periods.