In 2008, an extensive review of all available data from standardized tests of micronized copper systems was published and there has been considerable work since then. This paper discusses over 20 field stake trials underway in well-known sites such as Gainesville, FL, Hilo, HI and the Dorman and Saucier sites in MS as well as tests from Australia and New Zealand. In addition, 4 ground proximity tests from HI and 3 ground proximity tests from MS are discussed. The micronized formulations are showing good performance in all of these field trials with standardized tests. In some tests, the micronized formulations are performing better than the amine soluble counterparts.