Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . om tbe tomato bligbt of tbe Southern remedies have been tried witbout success, andthe best 2:)reventive measures are those of the immediatedestruction of all blighted plants, and tbe use of newsoil in tbe greenhouse each fall. The Bacterial Tomato Blight Tomatoes in tbe Southern States are commonlvaffected by a bligbt similar to, if not identical witb, the THE BACTERIAL TOMATO BLIGHT 181 bacterial blight of potatoes. The tissues of diseasedpl
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . om tbe tomato bligbt of tbe Southern remedies have been tried witbout success, andthe best 2:)reventive measures are those of the immediatedestruction of all blighted plants, and tbe use of newsoil in tbe greenhouse each fall. The Bacterial Tomato Blight Tomatoes in tbe Southern States are commonlvaffected by a bligbt similar to, if not identical witb, the THE BACTERIAL TOMATO BLIGHT 181 bacterial blight of potatoes. The tissues of diseasedplants teem with bacterial germs, and no other form offungus is present at first. The malady has been studiedby Dr. B. D. Halsted, who has published a preliminaryaccount of it in Bulletin No. 19 of the Mississippi Ex-periment Station. The presence of the disease is usu-ally shown by the wilting of the younger leaves, especiallythose at the ends of the stems, and the yellowing of theolder foliage. The stems themselves also become af-fected, and when closely examined, are seen to havenumerous watery spots. A longitudinal section of such. FIG. 77. TOMATO LEAVES. a stalk reveals a greenish, watery center, very differentfrom that of the healthy plant. There is a blight affecting squashes and melons thatseems to be the same disease as this, and also as thepotato blight already referred to. Consequently neitherof these crops should follow the other on the same land, incase the disease has appeared. It is believed that thesoil becomes so contaminated with the germs that, incase either of these crops follows the other, the injurymay appear again. In addition to proper rotations, theburning of all diseased plants and rubbish in the field,and spraying early with Bordeaux mixture, are recom-mended as remedial measures. FUNGI AFFECTING SEEDLINGS AND CUTTINGS The Damping=off Fungus Pytliium DeBaryanum The malady known as ^ dam ping-off is familiar toall experienced gardeners. It affe
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
