. Bulletin. Agriculture -- Ontario. 21 Description. Dodder differs from ordinary weeds in possessing- no leaves. The yellow thread-like stems of the plant twine around the clover plants and send into their tissues small short rootlets, which are called suckers or haustoria. By means of these suckers the Dodder draws from the clover the food necessary for its growth and reproduction. It thus kills the clover by robbing the plant of its food and causing it to Fig. 20. Seed of Dodder. Enlarged about 12 times. The yellow thread-like stems of the Dodder first appear quite early in the seas
. Bulletin. Agriculture -- Ontario. 21 Description. Dodder differs from ordinary weeds in possessing- no leaves. The yellow thread-like stems of the plant twine around the clover plants and send into their tissues small short rootlets, which are called suckers or haustoria. By means of these suckers the Dodder draws from the clover the food necessary for its growth and reproduction. It thus kills the clover by robbing the plant of its food and causing it to Fig. 20. Seed of Dodder. Enlarged about 12 times. The yellow thread-like stems of the Dodder first appear quite early in the season. They soon spread from plant to plant until a tangled mass of yellow threads covers a whole patch of clover. Badly infested fields may become entirely covered with this pest in a short time. On these yellow threads are produced dense clusters of small white flowers, which are succeeded by rounded, brown seed pods. Each plant produces a large number of seeds. The seeds vary in size from 1-24 to 1-15 of an inch; are grey or yellowish brown in color, vary greatly in shape, but are gen- erally somewhat oval in outline, and the surface is dull and roughened. Eradication. Great care should be taken to secure clover seed free from Dodder seed. Clover seed containing this impurity is dear at any price. Small patches should be mowed, raked and burnt early enough to prevent seeding. If, by any chance, some of the seeds are scattered before the patches are mowed, several thorough hoeings should be given in order to prevent any young plants from getting established. Badly infested fields should be plowed put under a hoed crop for a season. Clover should not again be sown in the field for two or three Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ontario. Dept. of Agriculture. Toronto : The Dept.
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