(PGBE) esters of 2,4,5-T and silvex were applied to Arizona chaparal at zero, one, two and four pounds per acre in the spring, spring-fall (of the same year), spring-spring, and springfall- spring, beginning in May, 1959. In a second experiment 2,4,5-T and silvex were applied at zero, two and four pounds as the alkanolamine salt, as PGBE esters in Kuron and Esteron form, and as PGBE esters of 2,4,5-T and silvex in Forron formulation in the spring of 1959 and 1960. All tests were made on replicated 25' x 50' plots. The treatments resulted in varying degrees of topkilling of shrub live oak but most plants resprouted from the base or live branches. Treatment effects were recorded in terms of visual estimates of damage to tops of oak bushes [...]
