(10) Halogeton: Low-volatile esters of 2,4-D at 2 pounds per acre at the 

 early-branching prebloom stage. 



(11) Deathcamas: Esters of 2,4-D at 1-1/2 to 3 pounds per acre when 

 plants have 3 to 5 leaves. Effectiveness drops very rapidly as spraying is 

 delayed. 



(12) Orange sneezeweed: Esters of 2,4-D at 3 to 5 pounds per acre at 

 the prebloom stage. 



(13) For control of low larkspur: Ester of 2,4-D at 1-1/2 to 2 pounds per 

 acre when plants are fully emerged, but before the appearance of flower 

 stems. 



(14) For control of tall larkspur: Esters of 2,4,5-T or silvex at 4 pounds 

 per acre when plants are in very early-bud stage of growth. Treatments 

 should be repeated annually until desired control is obtained. 



Comments and precautions . --Single applications of foliage sprays will 

 often control mesquite, sand sage and big sagebrush. Repeated treatments, 

 however, are frequently needed. For satisfactory control of miixed stands 

 of oak species and buckbrush, repeated annual applications for 2 or more 

 consecutive years are normally required. Where native grasses are present, 

 deferred grazing during the grow^ing season for 1 or 2 years is often de- 

 sirable. 



High-Volume Farm-sprayer Applications 



(1) Drenching foliage sprays applied with high- volume ground equipment 

 also may be used to control the above species. Depending on the tolerance 

 of the particular species, 2,4-D, 2,4,5-T, or silvex should be applied at 

 2 to 3 pounds in 100 gallons of water per acre. The best time to apply foliage 

 sprays on most woody plants is at the full-leaf stage and during the 3- to 4- 

 week period thereafter, providing conditions are favorable for active growth 

 before and at the time of application. All foliage should be wetted completely 

 with this spray. 



(2) AMS at 3/4 pound in 1 gallon of water applied to foliage as a wetting 

 spray is effective for control of mixed brush. It is less hazardous in areas 

 growing crops sensitive to 2,4-D and 2,4,5-T. AMS corrodes equipment. 



Individual Tree Treatments 



Individual plants of woody species can be killed at any season of the year 

 by esters of 2,4-D, 2,4,5-T, or silvex in a light fuel oil, such as diesel or 

 kerosene, applied to the basal bark or cut surface of trees. These treatments 

 are particularly appropriate for scattered stands growing either near or in the 

 same pasture with legumes or other susceptible pasture or crop plants. 

 (Treatments are fully described in Sec. VII, page 43.) 



Comments and precautions . --In attempting to control weeds and woody 

 plants growing in association with desirable forage grasses and legumes, 

 it should be remembered that the margin of selectivity is often narrow. 



- 38 - 



