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Show WEED CONTROL "Cancers of the Soil" State designated weeds are: Canada Thistle, Bull Thistle, Cockelbur, Wild Morning Glory, White Top, Russian Knapweed, Whorled Milkweed. Puncture Punc-ture Vine and Burdock. All these "Cancers of the soil" should be eradicated. eradi-cated. One of the ideal weed killers is Calcium Cal-cium Chlorate. This chemical can be secured from the County Crop Inspector. In-spector. (The following is taken from Chip-man Chip-man Chemical Engineering Co.) CALCIUM CHLORATE NOW APPROVED AP-PROVED BY IDAHO AGRICULTURAL AGRICUL-TURAL EXPERIMENT STATION AND OTHER STATIONS FOR KILLING NOXIOUS WEEDS. Why Calcium Chlorate ir replacing Sodium Chlorate as a weed killer: 1. It effectively kills all types of noxious weeds. 2. Its use eliminates the fire hazard created by the use of Sodium Chlorate. Chlor-ate. 3. It is deliquescent, and quickly takes moisture from the air and the plants, does not dry out quickly, which increases effectiveness. 4. It is manufactured in powder form instead of crystal form, convenient conven-ient to use, instantly soluble in water and may be dusted directly on the vegetation or applied as a spray. 5. It is especially compounded for weed killing purposes, containing activating ac-tivating ingredients which makes the chloric acid, the killing agent, more available and more active. 6. It is non-poisonous to humans and livestock and non-injurious to the soil. 7. It may be used in orchards without with-out injury to the trees if chemical does not come in contact with leaves or branches. 8. It is packed in convenient containers con-tainers for any purpose; 200-pound drums, 50-pound drums, and 3M-pound 3M-pound dusters or sifter-top cans. The dusters may be refilled from the drums. 9. If chemical is retained In drums it may be used next season. THE AMOUNT TO APPLY VARIES WITH THE PLANT AND THE LOCATION, LO-CATION, WHETHER IRRIGAT ED OR NON-IRRIGATED. The amounts of chlorate herewith recommended are taken from the Idaho Agricultural Experiment Station Report for 1929 made after a check on average results obtained on over 800 acres of perennial weeds treated in 1927 and 1928: NOTE. The amount to apply pertain per-tain to square rod areas or approximately approxi-mately 275 square feet. The maximum maxi-mum amount is reported for each of the following weeds. Morning Glory, 3 pounds of chemical chemi-cal per sq. rod in 3 gallons of water per square rod. Canada Thistle, 3 pounds of chemical chem-ical per sq. rod in 3 gallons of water per sq. rod. Russian Knapweed, IVi pounds of chemical per sq. rod in 3 gallons of water per sq. rod. White Top, m pounds of chemical per sq. rod in 3 gallons of water per sq. rod. Quack Grass. 2 pounds of chemical per sq. rod in 4 gallons of water per sq. rod. Willows, 3 pounds of chemical per sq rod in 4 gallons of water per sq rod. Other perennials, 3 pounds of chemical chem-ical per sq. rod in 4 gallons of water per sq. rod. Amounts to apply on non-irrigated areas: Use a 10 per cent solution made by dissolving four pounds of chemical to five gallons of water and applied at the rate of 150 to 200 gallons per acre, depending upon the density of the weed growth. This is the equivalent of 120 to 160 pounds per acre, or one pound and less per square rod. Spray outfits must be adjusted by trial to deliver the amount required. Recommendations for Application In The Northwest 1. How the Chemical Works. Plant poisoning is similar to blood poisoning. The plants absorb the chemical which circulates through the leaves, stems, and into the roots. If enough is applied and absorbed by the plant it will die. If the plant receives re-ceives an insufficient amount it may become weakened but survive. 2. .Amount to Apply. Use the amounts recommended previously. pre-viously. In irrigated and sub-irri gated sections an average of three pounds per square rod is required to kill the rooting system under the area. In non-irrigated, or dry lend sections, only one pound per square rod area is required. 3. How to Prepare Weed Area for Treatment. In irrigated sections, irrigate weed areas with rest of field in order to force a good growth. After one or two irrigations or when the weed is in bloom, dike the area and keep water wa-ter off. Treat and allow to remain unmolested until the next spring. In non-irrigated sections permit the weeds to grow unmolested and then treat. If area has been cultivated give the weed ample time to make full growth and then treat. 4. Time to Apply. The chemical should be applied after af-ter the plant has made full growth, or from the time the plant is in bloom until the end of the growing season. The late applications in many cases have proved most effective. The ob-jectional ob-jectional feature of a late application is that, generally, plants have boen permitted to seed. 5. How to Prevent Plant From Seeding. Seed-ing. If the chemical is not available before be-fore the plant is forming seed, mow the area if possible, and treat the second growth. 6. How to Apply. On small scattered patches use the sifter top duster or some improvised shaker which will permit a light uniform uni-form application of the powder. The powder applied to the plant in dry form adheres to the leaves and stms and is more effective than when dissolved dis-solved in water and sprayed on. The use of the duster will eliminate the expense of purchasing spray equipment. equip-ment. For larger areas, a barrel pump, an orchard power sprayer, an alfalfa weevil or beet sprayer with extension ex-tension bars would be satisfactory. 7. How to Prepare a Spray Solut'.on The amount of chemical per gallon gal-lon will vary somewhat with the type of spray outfit used. If a fine nozde Is used, dissolve one pound in one gallon gal-lon of water. If a coarse nozzle is used disolve one pound in l',-i to two gallons of water. IMPORTANT: The essential factor is to apply the required amount of chemical regardless of amount of water used. If one pound is dissolved in one ga! Ion of water, and one pound is required re-quired per square rod, apply one gallon gal-lon of water; if three pounds are required re-quired per square rod, apply three gallons of water; if one pound is dissolved dis-solved in two gallons of water and three pounds are required per square rods, apply six gallons of water. 8. Care of Area After Treating. It is essential that the area treated be left undisturbed. Burning, pasturing, pas-turing, irrigating, or cultivating after teatment greatly lessens the effectiveness effec-tiveness of the chemical and usually results in failure of eradication. 9. Regrowth May Occur. Many treated areas show a re-growth. re-growth. Do not become alarmed. If enough chemical was applied it will continue to act on the plant and by spring the weed should be eradicated. eradi-cated. 10. Use of Land for Crops. If the observations in the spring show that the application was thorough, thor-ough, that is, no new plants appearing, appear-ing, plow nnd crop. Plowing is more desirable than disking. If occasional occasion-al plants appear use the duster for clean-up work. New plants which may appear are probably produced from independent underground roots which failed to contact any of the chemical. 11. Cheaper to Treat This Year Than Next. Each year the weed areas increase. In one seson some perennials will grow from six to nine feet beyond the original or-iginal area. Each year more land is made unprofitable. If the weed are-treated are-treated this season, they may then be put in crop next season, thereby increasing the value and income of the property. |
