. Plant propagation : greenhouse and nursery practice . Plant propagation. Sl£!:i) TICSTIXG 51 78. Damping-off is a nurseryman's and gardener's term for the decay of seedlings and cuttings, more especially just above the surface of the ground. The conditions that favor it are excess of moisture in both soil and air, higher temperature than necessary for normal plant de- velopment, and poor light. The weak plants that develop under these conditions succumb to tiny fungi which live upon decaying vegetable matter in the soil, and which. FIG. 42—FRAMES FOR STRAW MAT MAKING These are homemade contr
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. Plant propagation : greenhouse and nursery practice . Plant propagation. Sl£!:i) TICSTIXG 51 78. Damping-off is a nurseryman's and gardener's term for the decay of seedlings and cuttings, more especially just above the surface of the ground. The conditions that favor it are excess of moisture in both soil and air, higher temperature than necessary for normal plant de- velopment, and poor light. The weak plants that develop under these conditions succumb to tiny fungi which live upon decaying vegetable matter in the soil, and which. FIG. 42—FRAMES FOR STRAW MAT MAKING These are homemade contrivances. Nursery and greenhouse supply houses mske mats by machine. live for months in spite of drouth or of frost. Should damping-off be noticed the healthy plants should be pricked out (81) or transplanted in fresh soil to save them if possible. So rapidly does the trouble spread that thousands of seedlings or of cuttings may be lost in a single night. Perfect drainage in open soil with ample watering and fresh air are partial safeguards. Steam sterilization (Fig. 40) of the sand for several hours is often done with good results. Damping-off frequently follows copious watering of a bed which has been very dry longer than advisable. The fungi usually believed to cause damping-off are Phytophthora omnivora {Fusariutii sp.), Pythium debaryaiium; but V. Peglion, an Italian investigator, has identified several others—Sotrytes cinerea, . 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 work.. Kains, M. G. (Maurice Grenville), 1868-1946. New York : Orange Judd Company