. Studies on the tobacco crop of Connecticut . Showing how the fungus injures base of 10. Dampening off Fungus of young Tobacco Plants. ary roots, but seldom if ever make perfectly normal tap root of a diseased plant is often destroyed and blackspots appear on the smaller lateral roots. A full discussionof this disease is given in (72) with bibliography p. 366. Seealso (74) and (83). Tobacco Diseases. 49 Remedies. Plants which are attacked cannot profitablybe treated in any way. The trouble seems to do most damagein seed beds though the plants may sometimes be first attac
. Studies on the tobacco crop of Connecticut . Showing how the fungus injures base of 10. Dampening off Fungus of young Tobacco Plants. ary roots, but seldom if ever make perfectly normal tap root of a diseased plant is often destroyed and blackspots appear on the smaller lateral roots. A full discussionof this disease is given in (72) with bibliography p. 366. Seealso (74) and (83). Tobacco Diseases. 49 Remedies. Plants which are attacked cannot profitablybe treated in any way. The trouble seems to do most damagein seed beds though the plants may sometimes be first attackedafter setting in the field. Once started in a bed, root rot is like-ly to increase from year to year making it necessary to abandonthe bed or to thoroughly disinfect it. Healthy. Disea= Fig. 11. Effect of rot on roots of mature field plants. When the bed is conveniently situated and permanentl}-built, the latter plan is often the best. The two effectivesterilizers are steam and formaldehyde. The latter method,fully discussed in (74) and (83), is in brief this: It is bestapplied in the fall but may be done early in the spring,thoroughly airing the beds afterwards. A mixture of 1 volume so Connecticut Experiment Station Bulletin 180. of formaldehyde or formalin 37-40per S. P. strengthin 100 volumnes of water is gradually sprinkled over the bedat the rate of a gallon per square foot, and slowly enoughnot to puddle the surface and leave liquid standing on it. Healthy.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjecttobacco
