. Chemical control of woody plants in California. Woody plants; Herbicides. effective when enough 2,4-D amine was used. The cut-surface method has been effec- tive on live oak stumps. Sprouts have been either eliminated or greatly reduced by the 2,4-D amine applied to a frill around the stump. Soaking the top of the freshly cut stump with the 2,4-D amine also markedly reduces sprouting and may be preferable, since the cost of application would be much less. This will not be effective unless you apply all of the chemical that will stick on top of the cut stump. Stump spraying is also useful on
. Chemical control of woody plants in California. Woody plants; Herbicides. effective when enough 2,4-D amine was used. The cut-surface method has been effec- tive on live oak stumps. Sprouts have been either eliminated or greatly reduced by the 2,4-D amine applied to a frill around the stump. Soaking the top of the freshly cut stump with the 2,4-D amine also markedly reduces sprouting and may be preferable, since the cost of application would be much less. This will not be effective unless you apply all of the chemical that will stick on top of the cut stump. Stump spraying is also useful on freshly cut live oak and will largely pre- vent sprouting if enough spray is used and if the application is properly made. Smaller quantities of spray will reduce sprouting and may be more economical. Ivan Lehman of Latrobe, California, sprays the stumps with a brush killer mixture in Diesel oil (about 4 pounds of each chemical to 24 gallons of Diesel). The sprouts are controlled with the same mixture, when they are still quite small— 6 to 10 inches. He has found that two to three times over the area virtually eliminates live sprouts. In general, basal sprays are better suited for use on the smaller stems of live oak, such as develop after burning or cutting. In tests conducted on 2-year- old sprouts, about 1 pint of 2 per cent 2,4,5-T per clump resulted in killing most of the clumps. On the larger stems it is best to chop cuts in several places near the base and fill them with spray. When this method is used, some retreatment will be needed. Foliage sprays are of greater general use for live oak than other methods. A single foliage spray may result in a high degree of kill of live oak sprouts; but some of the sprouts may have to be sprayed as many as 3 or 4 times before they are completely killed. Very thorough coverage of all leaves and stems to the ground is important. One good applica- tion may do a better job than three poorly made applications. May through July are ofte
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