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Show New Chemical Aids Farm Production Many Weed Control Problems Answered REPORTS of excellent results In AX killing weeds in grass plots, lawns and pastures, without damaging dam-aging the grasses, promises important impor-tant new uses of a compound called 2-4 dichlorophenoxyacetic acid (2-4-D for short.) Water sprays containing this, compound com-pound in specified solutions killed heavy stands of dandelion and narrow-leaf plantain without injury to the grass. Experiments with lawn pennywort in areas of turf that were heavily infested with the weed, resulted in destruction by 2-4-D acid of heavy stands of turf pest without accompanying accom-panying injury to the established grass. New grass seedlings coming from seed planted several weeks after the chemical treatment were not affected. Repeated applications were found necessary to kill out ti : Spray to Kill Weeds. noxious plants that came up later from weed seeds 'that were not caught by the first spray. Other weeds readily killed by the compound, according to a government govern-ment report, included chickweed, pigweed,- woodsorrel, knotweed and broadleaf dock. Well established blue grass was not injured by the potent new herbicide. herbi-cide. The creeping bent grasses were found much less resistant to it but resistant enough to permit the killing of susceptible weds without being destroyed themselves. The 2-4-D acid's effect on susceptible suscepti-ble weeds and clover is much different dif-ferent from that of other chemical herbicides. Instead of producing a local burning effect, and destroying only a part of the plant, it spreads and kills the entire plant, roots and alL |