Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . to Professor L. , it may be prevented by spraying with sulphideof potassium (one-fourth ounce to a gallon of water)about twice a week. Probably the ammoniacal coppercarbonate solution, or other copper fungicides, wouldprove equally effective. r THE PETUNIA BLIGHT 125 The Petunia Blijjht Ascochyta petunice Petunia leaves are sometimes affected by a blight,which is likely to begin near the center and to spread inall directions. Sometimes rings are pro
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . to Professor L. , it may be prevented by spraying with sulphideof potassium (one-fourth ounce to a gallon of water)about twice a week. Probably the ammoniacal coppercarbonate solution, or other copper fungicides, wouldprove equally effective. r THE PETUNIA BLIGHT 125 The Petunia Blijjht Ascochyta petunice Petunia leaves are sometimes affected by a blight,which is likely to begin near the center and to spread inall directions. Sometimes rings are produced on theinjured tissues. Like other fungi, this species repro-duces by means of spores, which are developed in greatnumbers. The early application of fungicides is sug-gested as a preventive. There are many other fungous diseases of flowersand foliage plants, but the limits of the present workprevent their discussion here. Illustrated accounts ofmany of them have been published by Dr. Halstead andothers in The American Florist, Garden and Forest,The American Agriculturist, and other journals. IF^I^T TV Fungi affecting vegetables. FUNGI AFFECTING THE BEAN The Pod=spot or Anthracnose Colletotriclium lagenarium Young bean pods, especially of the yellow or waxvarieties, are often affected by small reddish-brownspots, slightly sunken beneath the surrounding the pods develop these spots increase in size, andtheir centers become blackened. In course of timemany of them may run together to form long discoloredblotches upon the sides of the pods, and generally theblackened centers eventually become of a dirty gray orlight brown color. The effect upon the pod of such anattack is disastrous; it is shrunken and out of shape,and the beans within are dwarfed and shriveled. This disease is seldom destructive, except duringseasons of rainy weather. It occurs in several Europeancountries, and has been found over a large portion ofthe United States. It winters over, in part, by means
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
