. Chemical control of woody plants in California. Woody plants; Herbicides. Soil applications Soil sterilants can be used for elim- ination of woody plants, but cost and resulting bare soil limit the usefulness of this method (see circular 446). YOU WILL NEED SOME EQUIPMENT ... Knapsack or hand sprayer; power sprayer; mist blowers; aircraft Knapsack and hand sprayers Four-gallon knapsack sprayers equip- ped with a double-action trombone pump have been used for controlling wild currants and gooseberries (ribes), which are alternate hosts for the white pine blister rust. The sprayers should be e
. Chemical control of woody plants in California. Woody plants; Herbicides. Soil applications Soil sterilants can be used for elim- ination of woody plants, but cost and resulting bare soil limit the usefulness of this method (see circular 446). YOU WILL NEED SOME EQUIPMENT ... Knapsack or hand sprayer; power sprayer; mist blowers; aircraft Knapsack and hand sprayers Four-gallon knapsack sprayers equip- ped with a double-action trombone pump have been used for controlling wild currants and gooseberries (ribes), which are alternate hosts for the white pine blister rust. The sprayers should be equipped with oil-resistant hose and washers. Knapsack sprayers and com- pressed-air sprayers of various types are on the market. Proper nozzles and tips, shut-off valves, oil-resistant hose, and washers all help to make application easier and better. It is wise to have a supply of the parts that may need re- placement and to wash the sprayers after each use. These sprayers are useful for fire- fighting, but should not be used for spraying other vegetation since the com- plete removal of 2,4-D is difficult, and sensitive plants might be damaged. Power sprayers Large areas of brush are system- atically sprayed using truck-mounted sprayers. In some cases the trucks are stationary while the sprays are being applied. Long main lines of hose may lead away from the truck, and at speci- fied distances side hoses may be attached to these. You may need pressures of 60 to 600 pounds per square inch. Areas as far away from the pumper as 3,000 feet are sprayed in ribes control. Pneu- matic-type quick couplings are used, and the hose can be easily extended or contracted at will. Spray booms attached to the truck or sprayer may be used for roadside spraying. Mechanical agitation in the spray tanks insures a uniform mixture of the spray solution. When it is not pos- Below: Tractor sprayer making chemical ap- plications to mountain misery (or bear clover). (H. R. Offord) Right: Knapsack sprayer
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Keywords: ., bookcentury1900, bookcollectionamericana, booksubjectwoodyplants
