. Control of aquatic and ditchbank weeds. Weeds. Chemical Methods of Con trot Many chemicals are now available for use as weed killers, all of them effective if applied to the right weeds at the right time. The operator's problem is one of knowing what materials to use and where, when, and how to use them intelligently. Sodium arsenite is the traditional "weed killer'' that has been used for years to control general weed growth. It is still one of the cheapest and most effective chemicals for control of ditchbank weeds. It may be used where there is no danger of its poisoning stock or pet
. Control of aquatic and ditchbank weeds. Weeds. Chemical Methods of Con trot Many chemicals are now available for use as weed killers, all of them effective if applied to the right weeds at the right time. The operator's problem is one of knowing what materials to use and where, when, and how to use them intelligently. Sodium arsenite is the traditional "weed killer'' that has been used for years to control general weed growth. It is still one of the cheapest and most effective chemicals for control of ditchbank weeds. It may be used where there is no danger of its poisoning stock or pets. It can be used as a spray on young weeds or as a sterilization treatment on the soil. Arsenic trioxide is also useful as a soil sterilant on ditchbanks. Sodium chlorate as a spray or as a soil treatment is useful against perennial weeds. On vegetation, it forms an inflam- mable mixture. It should be used with caution. Trichloroacetic acid (TCA) is a new herbicide. The sodium and ammonium salts of this acid are very toxic to grasses, and less toxic to some broad-leaved weeds. TCA is being used to kill Johnsongrass, Bermudagrass, and quackgrass. It is most effective as a spray when it is washed into the soil by rains after being applied to the tops of weed growth. It is a valuable addition to our list of herbicides as it does not sterilize the soil for a long pe- riod. Contact sprays may be used on all emersed weed growth above the water line, and on common ditchbank weeds. These sprays include: diesel, smudge-pot, and other fuel and waste oils, and special commercial products, such as Pentox Weedkiller #2, Shell Weedkiller #20, Avon Weed Killer, Chapman-Gilbert Weedkiller #5, Cox Hykil Weed Oil, Foothill Oil Weedkiller, General Weed Exterminator, G & H Weed Oil, Harold. m W &. Failure to control tules may result in a completely clogged ditch such as this [10]. Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
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Keywords: ., bookcentury1900, bookcollectionamericana, bookl, booksubjectweeds
