Field studies were conducted in 2007 and 2008 in North Carolina to determine the response of the weed Maryland meadowbea-uty and blueberry to flumioxazin PRE (pre-emergence). No injury to non-bearing (blueberry plants not mature enough to produce fruit) or bearing (blueberry plants mature enough to produce fruit) blueberry from flumioxazin PRE was observed. In non-bearing blueberry, control of meadowbeauty was greater than 97 90 DAT (days after treatment) with the registered rate of 0.42 kg ai ha~(-1) flumioxazin. Across two studies in bearing blueberry, a single application of flumioxazin at 0.42 kg ai ha~(-1) controlled meadowbeauty 79 to 92 90 DAT. Flumioxazin at 0.21 kg ai ha~(-1) applied twice 60 d apart resulted in greater than 96 meadowbeauty control 90 d after the first application. Treatments of flumioxazin applied as a single application or two applications applied sequentially 60 d apart in bearing blueberry had yields ranging from 3150 to 6065 kg ha~(-1)and 3551 to 5735 kg ha~(-1),respectively, and did not have a negative effect on blueberry yield regardless of application rate compared to the nontreated check.
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