Glyphosate (RoundUp)

Glyphosate (RoundUp) is registered for use on apples and pears up to 14 days before harvest and in stone fruit orchards up to 28 days before harvest. It is effective in controlling many emerged annual and perennial grasses and broadleaved weeds. Best results occur when it is applied as a 2 percent solution. It is labeled as a directed spray on apples and pears. In stone fruits it must be applied through a wick applicator. Glyphosate has no preemergence activity; therefore, it should be combined with a preemergent material for residual activity.

Caution: Avoid all contact with tree foliage. The chemical is not readily metabolized by plants, and accidental coverage could cause injury the following year. Glyphosate should not be stored or applied in galvanized steel or unlined steel (except stainless) containers or tanks. It can react with these containers to produce highly combustible hydrogen gas mixtures.