VII. CONTROL OF WOODY PLANTS AND WEEDS ALONG 



FENCEROWS, DITCHBANKS, ROADSIDES, UTILITY LINES, 

 AND ON NON-CULTIVATED AREAS 



FOLIAGE SPRAYS 



(1) Woody plants and weeds, including mixed brush species .-- Woody plants and weeds 

 sensitive to esters of 2,4-D, 2,4,5-T, 2-(2,4,5-TP), and MCPA may be controlled by 

 the application of a wetting foliage spray containing 3 pounds of the herbicide per 100 

 gallons of water. A mixture of 2,4-D and 2,4,5-T is suggested for the control of mbced 

 brush species, some of which are tolerant to 2,4-D but not to 2,4,5-T and vice versa. 

 A wetting foliage spray of amnnonium sulfamate at 3/4 pound in 1 gallon of water will 

 effectively control mixed brush species. 



BASAL SPRAYS DURING GROWTH OR DORMANT PERIODS 



(1) Trees and brush less than 6 inches indiameter . --Basal sprays containing esters 

 of 2,4-D or 2,4,5-T or mixtures of these herbicides at 8 to 16 pounds in 100 gallons of 

 dlesel oil may be applied during dormancy or active growth periods to kill trees and 

 brush that are less than 6 inches indiameter. The spray should be applied to the entire 

 basal area of all stems to a height of 12 to 18 inches and to the point of run-off. Basal 

 treatment is usually more effective on the tolerant species than foliage applications. 



CUT SURFACE TREATMENTS 



(1) Trees 6 inches in diameter or larger . --An ester of 2,4,5-T at 16 pounds in 100 

 gallons of diesel oil applied in frills or cups cut into the trunks of trees will give good 

 control of trees 6 inches in diameter or larger. This treatment is also suggested for 

 the control of woody species with thick bark. 



STUMP TREATMENT 



(1) Stumps and stump sprouts . --In recently cut-over areas, and on rights-of-way of 

 roadsides and utility lines where standing trees are objectionable, it is often desirable 

 to prevent sprouting of stumps after the trees have been cut and removed by mechani- 

 cal means. The stumps of cut trees may be effectively killed and sprouting prevented 

 by using 2,4,5-T or mixtures of 2,4-D and 2,4,5-T at 8 to 16 pounds of acid equivalent 

 per 100 gallons of diesel oil applied to the stump so as to wet completely the top and 

 sides to ground level. High volume should be used and all exposed roots should be 

 sprayed. 



Ammonium sulfamate may be applied as crystals to the surface of the stump or the 

 entire stump may be sprayed with the herbicide at 4 to 6 pounds per gallon of water. 

 This treatment is also effective In preventing sprouting of stumps. 



SOIL STERILIZATION 



The term "soil sterilization" refers to nonselective weed control in which the soil 

 Is rendered unproductive for varying durations but not permanently. 



Soil sterilants are used to control all the vegetation on an area. Few^ if any chemicals 

 alone will kill all species of plants at rates of application that would be economically 

 feasible. For this reason, herbicide mixtures are finding wider use for soil steriliza- 

 tion. 



Sodium chlorate atSOO to 1,800 pounds per acre, boraxat l,800to4,800 pounds, sodi- 

 um arsenlte at 300 to 1,200 pounds, the urea herbicides at 20 to 100 pounds, and mixtures 



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