Canada thistle


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Canada thistle

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Lydon wants to determine the size of the mite population needed to significantly impede growth of Canada thistle and whether this mite can transmit a disease or a virus to the weed.
For this reason all grass and clover seed should be carefully examined before sowing to make sure that it contains no Canada thistle seed.
Quackgrass is more persistent and more difficult to eradicate than the Canada thistle, hence any method which will eradicate quackgrass will surely destroy Canada thistles or any other perennial weed.
Salting the plant: Cut off the Canada thistle while in bloom just beneath the surface of the earth and apply a large handful of salt, or better yet, a half pint of stiff salt brine where the thistle is cut off.
They are quackgrass, Canada thistle, burdock, white or oxeye daisy, snapdragon or butter and eggs, cocklebur, perennial sow thistle, sour dock, yellow dock, wild mustard, wild parsnip, and Russian thistle.
Canada thistles in many cases spread only by the roots and bear no seeds, while in other instances, where the conditions are favorable, a large amount of seed is produced.
In fact, many farmers even insist that quackgrass and Canada thistles are blessings in disguise because their presence necessitates more intensive preparation of the seed bed, and better and more frequent cultivations of the crop than is often otherwise given.
Habits: Canada thistles seldom bear seed in cultivated fields but in clover or grass fields, in pastures, groves or fence rows where they may develop undisturbed for a time, seed is often produced abundantly.
While Canada thistles produce more or less seed, yet the increase of these pests is due largely to the roots which spread out rapidly in all directions and are transplanted in widely different portions of the farm by the plow, drag, and cultivator.
This means almost sure death to Canada thistles, but often fails with quackgrass and must be adopted advisedly.

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