Your textbook is an excellent resource for this class and for many of your future questions concerning plant pathology, nevertheless it does contain some errors or lack of clarity on some topics. The errors are listed below by Page, Paragraph and Line. Existing text is in normal typeface, text that should be removed is marked like this, and new text to be inserted is marked like this.

Page Paragraph Line

269 2 1-6 Should state that Pythium species are soil inhabitants.

294 5 1-4 "...overwinters as ascospores or thick walled conidia on the tree, perhaps in the bud scales. In the spring, these spores are splashed or blown onto young tissues..."

297 Fig 11-40 The mildew is shown to overwinter as cleistothecia or mycelium (bottom of the figure). Note that the overwintering mycelium is under bud and leaf scales, not on the surface of the host.

343 8 1-5 "...but most commonly, especially in the cooler temperate regions, as chlamydospores in soil (Figure 11-78)."

345 Fig 11-78 Fusarium oxysporum does not cause the collapse of vessels (upper right). "Mycelium and microconidia in vessels" (top center). "Macroconidia form in sporodochia on dead leaves." (center right).

346 4 7 "...Verticillium wilt develops sometimes primarily in seedlings, which usually die shortly ..."

346 6 13-14 ".. overwinter as mycelium within perennial hosts and in propagative organs, or in plant debris."

382 "Corn Smut" Note that there is saprophytic multiplication of the haploid phase of some smuts, especially corn smut."

397 3 7-8 Rhizomorphs are probably NOT carried by equipment to any great extent.

399 Fig 11-115 It is highly unlikely that basidiospores play any role in infecting roots of healthy trees. If anything, airborne basidiospores could colonize stumps and open wounds on living trees, in much the same way as Fomes annosus, but there is little evidence for this. There is always an old, colonized woody residue at the center of any agricultural infection.

420 3 2-3 "Angular Leaf Spot of Cotton" "The disease is present wherever cotton is grown, except in California."

428 7 1-5 Note that recommendations to grow trees in sod (ie. with grass ground cover) and to have good insect control programs do not apply in the western United States. Sod culture is rarely feasible and the importance of post-blossom spread by insects is negligible.

476 3 11 "... main means of local spread of the parasite,..."

580 1 10 Early sowing has little effect on control of the sugar beet nematode on beets grown for the entire summer. I assume this reference is for red table beets grown for truck garden production.

618 "Vector" "An animal organism able to transmit a pathogen."

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