. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 3*9 XXIII. FLAX WILT Fusarium Lini Bolley Bolley, H. L. Flax Wilt and Flax Sick Soil. N. D. Agl. Exp. Sta. Built. 60: 27-60. This important flax disease, which is reported as particularly destructive in North Dakota, seems to be characterized by symp- toms similar to many other diseases caused by species of Fusa- rium. Affected plants may be killed in the seedling stage, or they may wilt and die at any time during the growing period. The fungus has been found to be
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 3*9 XXIII. FLAX WILT Fusarium Lini Bolley Bolley, H. L. Flax Wilt and Flax Sick Soil. N. D. Agl. Exp. Sta. Built. 60: 27-60. This important flax disease, which is reported as particularly destructive in North Dakota, seems to be characterized by symp- toms similar to many other diseases caused by species of Fusa- rium. Affected plants may be killed in the seedling stage, or they may wilt and die at any time during the growing period. The fungus has been found to be ordinarily very abundant in soils in which flax has been grown several successive years, and it is considered to be the chief cause of the failure of flax upon land where flax has previously been grown. In fact, Bolley points to this fungus as the cause of flax-sick soil. It would seem to be doubt- ful, however, if the action of this fungus would ex- plain all the peculiar rela- tions of flax to the soil upon which it has been grown. The fungus pro- duces an abundance of conidia which are typically somewhat curved, 4-celled, and prompt to germinate. No perfect stage of this organism has been found. It is believed that the old straw, stubble, etc., of diseased stalks harbor the fungus, and that since the fungus is in nature, perhaps, more particularly a saprophyte, there is ordinarily abundant opportunity for it to be carried over from one year to the next. Control. Control consists of seed treatment; yet in this con- nection it should be said that the seed of flax are very readily injured by treatment even with water, and therefore much caution is needed to prevent injury to the seed. It is advised to sprinkle the seed with a formalin solution, using formalin at the rate of. Fig. 151. China Asters dwarfed and killed by fusarium. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance
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Keywords: ., bookauthorduggarbe, bookcentury1900, bookdecade1900, bookyear1909
