. Common weeds of Canada [microform] : a pocket guide. Weeds; Mauvaises herbes, Lutte contre les; Weeds; Mauvaises herbes. COMMONfWEEDS OF CANADA 43 wide dis- and waste )us weed. epens, (L), s a worse perennial r runners, which are ;le is fur- It spreads abundant lily. ERRICK. rough with iches chiefly 3 feet high, and several g; alternate alK)ut two- are notice- Si i)etals 4, jynous; in part longer 1 diameter, nder micro- leir vitality nt produces eristic pod, [ it the a])- is enclosed. 1.—Annual. SeiJteniher. y birds and idication.— mmon ni isome on . Though t is once :rcropped leglected. T!i
. Common weeds of Canada [microform] : a pocket guide. Weeds; Mauvaises herbes, Lutte contre les; Weeds; Mauvaises herbes. COMMONfWEEDS OF CANADA 43 wide dis- and waste )us weed. epens, (L), s a worse perennial r runners, which are ;le is fur- It spreads abundant lily. ERRICK. rough with iches chiefly 3 feet high, and several g; alternate alK)ut two- are notice- Si i)etals 4, jynous; in part longer 1 diameter, nder micro- leir vitality nt produces eristic pod, [ it the a])- is enclosed. 1.—Annual. SeiJteniher. y birds and idication.— mmon ni isome on . Though t is once :rcropped leglected. T!ie seeds, once in the ground, live for years. As soon as they are brought to the surface, germination takes place. When the weed is once established it is difticult to rid the ground of it. When the plant is not very common, hand-pulling is the best method, provided the pulling is done before the seeds are formed. After the plants are pulled they should be dried and burned. When fields are over- run with mustard, it is best to harrow stubble after harvest, or gang-plow and harrow. As soon as the seeds have sprouted, cul- tivate thoroughly and re- peat the cultivation often. The following spring put in a hoe-crop and cultivate thoroughly during the growing season. Sow a crop of grain the following season, and pull the weeds by hand out of the grain crop. Then keep the field ill hay or pasture two or three years. Spraying with a two per cent, solution of copper sulphate (10 pounds dis- solved in 50 gallons of water), or a 73^^ per cent, of ferrous sulphate, will cereal crops without injuring the latter. The spray should be applied at the rate of 30 to 40 gallons per acre, when the plants are young. The crop should be dry at the time of application, and for success no rain should fall for at least 24 hours afterwards. Black Mustard. Iltassica nigra, (L), which has sulphur-yellow flowers, a tall, smooth stem with lower leaves lyrate, and short ^oiich square pods, is found in old
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1910
