Author : Charoon Prohmchum

Summary : The experiments were conducted to determine the tolerance of various cultivars of tomato and cabbage to butachlor and pendimethalin. The possibility of using activated carbon in protecting cabbages and tomatoes from pendimethalin and butachlor injury was also evaluated. Tolerance of direct-seeded tomatoes to butachlor varied with cultivar and stage of seedling growth. However, no difference was observed among cultivars of cabbage. Tomatoes and cabbages were not adversely affected by pre-emergence application of butachlor but were severely injured when the herbicide was applied as post-emergence. On the other hand, both direct-seeded crop species were very susceptible to pendimethalin regardless of cultivar or stage of herbicide application.