. Studies on the tobacco crop of Connecticut . ot. Tliere are at leastthree different fungi v,hich cause dampening off trouble inthe seed bed. When these attack older plants the tissues ofwhich are harder, they may cause cankers on the lower partof the stem. Sucji plants should never be used for setting asthey are likely to break off at the cankered places and evenif they survive are not as thrifty as normal plants. These troubles are induced or aggravated by over-crowdingand excessive moisture and can be largely prevented by properwatering and ventilation, matters to be learned by experience.
. Studies on the tobacco crop of Connecticut . ot. Tliere are at leastthree different fungi v,hich cause dampening off trouble inthe seed bed. When these attack older plants the tissues ofwhich are harder, they may cause cankers on the lower partof the stem. Sucji plants should never be used for setting asthey are likely to break off at the cankered places and evenif they survive are not as thrifty as normal plants. These troubles are induced or aggravated by over-crowdingand excessive moisture and can be largely prevented by properwatering and ventilation, matters to be learned by experience. Tobacco Diseases. 47 If they persist in a bed, sterilizing or changing the soil or thelocation of beds may prove helpful. Low, moist land andabundance of vegetable matter, especially stable manure, ag-gravate these troubles. They are apt to develope in cold, moist, or muggy weatherwhen it is difficult to rightly air the beds. The figures show the work of the fungus and the effectof soil sterilization ; 1 is soil sterilized, 2 soil Fig. 9. Effect of treatment in preventing Stem Rot fungus. Root Rot. This disease, first found in this state by botanist on violets, did very serious damage in Con-necticut seed beds and fields in 1906 and 1907 but has not been 48 Connecticut Experiment Station Bulletin 180. very prevalent since that time. It attacks the roots of the planteither very early in the bed or later in the field. The affectedseedlings show little vigor, form rosettes of leaves close tothe ground instead of standing upright and may either wiltand die or finally outgrow the disease by forming new second-
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjecttobacco
