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About preemergent herbicides
Eric Hanson, Horticulture
Preemergent herbicides are applied to the soil and absorbed by plants. Even those labeled for blueberries can injure bushes if high rates are used. The potential for injury is greatest on sandy soils or soils low in organic matter. Young or weak bushes are especially vulnerable. Injury can also occur if the spray application is not uniform over the soil surface or if rains move herbicides concentrating them in low areas.
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Last Updated - 9/27/09