. Manual of fruit diseases . Fruit. Fig. 90. — Fire-blight on apple fruit; drops of bacterial ooze on tlie surface. Suckers which arise from the crown, at or below the surface of the soil, are often bhghted, allow- ing the bacteria entrance into the bark of the roots. Trees may die from such a form of attack. Grafts are especially disposed to blight during the first year or so on account of their rapid and succu- lent growth. Wounds in the larger limbs or the body of the tree may serve as centers of cankers. Here the bacteria are carried by the bark-boring beetle and deposited in their borings
. Manual of fruit diseases . Fruit. Fig. 90. — Fire-blight on apple fruit; drops of bacterial ooze on tlie surface. Suckers which arise from the crown, at or below the surface of the soil, are often bhghted, allow- ing the bacteria entrance into the bark of the roots. Trees may die from such a form of attack. Grafts are especially disposed to blight during the first year or so on account of their rapid and succu- lent growth. Wounds in the larger limbs or the body of the tree may serve as centers of cankers. Here the bacteria are carried by the bark-boring beetle and deposited in their borings. In these cankers and blighted limbs and twigs the bac- teria pass the winter. With the return of the warm weather and rains of the spring the rise of sap encourages the growth and multi- plication of the bacteria, which ooze out and afford the source of the inoculum for the opening blossoms. Weather conditions should not be confused with the causal factor of fire-blight. On the other hand, the weather is correlated to some extent with epiphytotics of the , ^"'\^^-,:;:^/™^^wl'*^°°^^^' trouble. Late' frosts ~may stop fruit; healthy fruit left, diseased , ,. , , .„. „ , ,. fruit right. blight by killing certain oi the dis-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hesler, L. R. (Lexemuel Ray); Whetzel, Herbert Hice, 1877-1944. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
