70 EXPERIMENT STATION. [Jan. 



chickweed, dandelion, Canada thistle, bindweed, plantain, 

 rongh pigweed, kingliead, red river weed ami rag-weed cocklebur. 

 For treating dandelions — and plantain is susceptible to some 

 extent — be advises spraj'ing a lawn with iron sulfate, at the 

 rate of lYs to 2 pounds of iron sulfate to each gallon of water. 



J. L. Stone ^ found that wild mustard could be destroyed 

 in grain fields when treated with a solution of copper sulfate, 

 at the rate of about 10 pounds to 40 gallons of water, without 

 injury to the crop. 



Prof. L. R. Jones ^ found that salt at the rate of 3,000 

 pounds per acre would kill orange hawkweed in mowings, and 

 it may be mentioned that this weed is becoming more common 

 on highlands in this State. It is advisable that these spraying 

 treatments be given in bright, sunshiny weather, when the 

 temperature is relatively high. 



Climax Lawnsand. — This is a weed killer put out by the 

 Boundary Chemical Company, Ltd., of Liverpool, Eng., and 

 has been sold the past year by some of the leading seedsmen. 

 It is a finely powdered, dry chemical, and when applied in 

 bright, dry weather is said to kill daisies, plantain, moss and 

 other weeds having spreading surface roots and rough, hairy 

 leaves, to which it can adhere. At the same time this lawn 

 sand acts as a fertilizer, promoting a luxuriant growth of grass. 



According to Mr. G. H. Chapman, who made an examination 

 of its chemical constituents in the laboratory, it contained over 

 66 per cent, of sand, which acts as a carrier, together with iron 

 sulfate and nitrate of soda. The eifects of the nitrate of soda 

 were plainly apparent on lawns after this had been used. They 

 recommend the use of 28 pounds to 100 square yards to de- 

 stroy weeds. For daisies and moss it is recommended that 

 from 3 to 5 ounces be api>lied to the square yard, and for 

 dandelions, plantain, thistle, rib grass, etc., they recommend 

 the application of one heaping teaspoonful to the cro\vn of each 

 plant, the amount depending upon the size of the plant. Some 

 tests of this substance made on various woods showed, as might 

 be expected, since it contains sulfate of iron, that it destroys 

 certain weeds, while the grass in the treated plots was stimu- 



1 P.ullctin No 2I(;, New York (Cornell) Aurrioiilf iiral Kxiiorinicnt Station, 1904. 



2 Bulletin No. 5(i, Vermont Agricultural Experiment Station, I'JOT. 



