. Fig. 21.—Young beet plant affected with curly top. Many other kinds of plants are also susceptible, the most important being the tomato, in which the disease was first called "western yellow ; For other hosts, see the general discussion of this disease (p. 68). Curly top is an extremely sporadic disease, being \evy abundant and destructive some years and again almost absent. The cause of the disease is a virus. As a rule it is more common in the warmer interior valleys and

---

Size: 1785px × 2799px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookcollectionamerica, booksubjectplantdiseases