PENGARUH BEBAS-HUJAN SETELAH APLIKASI TERHADAP EFIKASI GLIFOSAT PADA GULMA DI LAHAN KELAPA SAWIT

The objective of this research was to study the efficacy of herbicide products with active ingredients of glyphosate on some rain-free period after application to weeds in oil palm plantations. The research were are design arranged in split-plot design with two factors and three replications. The main factor is glyphosate herbicide (Crucial 700; Crucial 550; Roundup Power Max; Roundup Biosorb; Kleenup). And the second factor is period rain-free after aplications (0.5; 1.0; 2.0; 4,0; and no rain). The results of this study showed that all glyphosate-based herbicides required rain-free period after application more than where the efficacy four hours. The highest damage (80 %) of weed on rain free time after 12 hours.