IV. WEED CONTROL IN HORTICULTURAL CROPS 



VEGETABLE CROPS 



Asparagus 



(1) Seedbeds, pre -emergence . - -For control of most annual broadleaved 

 weeds and weed grasses with little or no crop injury: Monuron at 1 to 1-1/2 

 pounds or a light aromatic oil at 80 gallons per acre applied just prior to 

 emergence of asparagus. Higher rates of application may result in injury, 



(2) Established beds, pre -emergence . - -For control of many annual weeds 

 w^ith little or no crop injury: Either monuron at 1 to 2 pounds, 2,4-D at 

 1-1/2 to 2 pounds, sesone at 3 to 6 pounds, or NPA sodium salt at 4 to 8 

 pounds in 10 to 40 gallons of water per acre applied after disking and before 

 spear emergence. Beds are commonly disked to loosen the soil, destroy 

 weeds, and to remove old ferns. 



(3) Established beds, after cutting season . --For control of many annual 

 broadleaved weeds and weed grasses : Monuron at 1 to 1 - 1/ 2 pounds per acre. 

 For control of perennial weed grasses: Dalapon at 5 to 10 pounds per acre 

 as spot spray. 



Comments and precautions .- -Use highest rate on muck soils and heavy 

 clay soils under arid conditions; use low^est rate on light sandy soils under 

 humid conditions. 2,4-D, and monuron should not be applied more than once 

 each season. Herbicide mixtures are often required for satisfactory weed 

 control if the weed population contains both grasses and broadleaved weeds. 



Beans 



(1) Pre-emergence . - -For control of most broadleaved weeds and annual 

 grasses with little or no crop injury: DNBP amine salt at 4 to 8 pounds, 

 EPTC at 3 to 5 pounds, or CDEC or CIPC at 4 to 8 pounds in 20 to 40 gallons 

 of water per acre. A mixture of DNBP at 4 pounds and EPTC, CIPC or CDEC 

 at 3 to 4 pounds in 20 gallons of water per acre will control smartweed and 

 annual grasses not controlled by DNBP alone; also will control lambsquarters 

 and ragweed, which are not normally controlled by CIPC alone, 



(2) At emergence . - -For control of most broadleaved weeds and annual 

 grasses: DNBP amine salt at 3 to 4 pounds applied in 20 to 40 gallons of 

 water per acre during early emergence when beans are not beyond the crook 

 stage. 



Beets 



Use same control measures suggested for sugar beets. 



Cantaloups 



(1) Pre -emergence . --For control of most annual weeds: NPA sodium salt 

 at 2 to 3 pounds in 10 to 40 gallons of water per acre on light sandy soils, 



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