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Allen V. Barker

Mineral Nutrition and Plant Disease. Lawrence E. Datnoff, Wade H. Elmer, and Don M. Huber (editors). 2007. APS Press, St. Paul, MN. 278 pages. $89.00 Hardcover. ISBN 978-0-89054-346-7. This book covers the relationship of mineral nutrients

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Touria El-Jaoual

Biological Control of Plant Diseases. S.B. Chincholkar and K.G. Mukerji (eds.). 2007. The Haworth Press, Inc., Binghamton, NY. 426 pp. plus index; 17 tables and 26 black-and-white photographs and illustrations; 6-inch × 8.35-inch format. ISBN

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Christopher C. Mundt

The Study of Plant Disease Epidemics. Laurence V. Madden, Gareth Hughes, and Frank van den Bosch. 2007. APS Press, St. Paul, MN. 432 pages. $89.00 Hardcover. ISBN 978-0-89054-354-2. This book is essentially a second edition of Introduction to

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Harry A.J. Hoitink, Alex G. Stone, David Y. Han, Weidzheng Zhang, and Warren A. Dick

Compost offers the potential to suppress root rots and vascular wilts caused by soilborne plant pathogens, as well as plant diseases affecting aerial plant parts. Many factors affect the degree of control obtained. They include the decomposition level (stability) of the compost, the types of microorganisms colonizing the organic matter after peak heating of the compost, plant nutrients released by the compost (fertility), its salinity, loading rates, and other factors. Biocontrol agents in composts induce suppression through various mechanisms, including competition, antibiosis, hyperparasitism, and the induction of systemic resistance in the plant (roots as well as foliage) to pathogens. Examples of each of the effects are reviewed.

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Liming Chen, Heping Zhu, Leona Horst, Matthew Wallhead, Michael Reding, and Amy Fulcher

In commercial fruit farms and ornamental tree nurseries, producers generally use integrated pest management tactics, including pesticide treatments, to control a variety of insect and plant disease pests ( Beckerman, 2018 ; Braman et al., 2015

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Joseph Postman, Gayle Volk, and Herb Aldwinckle

unique resistance genes. The presence of disease resistance information in searchable databases can expedite gene discovery, but publications and databases containing plant disease resistance data are often inconsistent in the scales used to present data

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Robert Wick

Several biological control agents for the control of fungal diseases have recently been commercialized. Do the claims of pest control meet the expectations of the growers? Do the biocontrol agents perform consistently? How do they compare to chemicals? These questions have yet to be answered but recent trials indicate mixed results. In Massachusetts, Mycostop worked well against fusarium stem rot but not against fusarium wilt. Deny (Burkholderia cepacia) did not perform well against Rhizoctonia or Pythium root rot of poinsettia. The following information was taken from the 1997 and 1998 Biological and Cultural Tests for Control of Plant Diseases. In Maryland, zinnia damping-off was controlled by both SoilGard (Gliocladium virens) and Bio-Trek (Trichoderma harzianum). The biocontrols performed as well as the conventional fungicide. In North Carolina, GlioGard (Gliocladium virens) and SoilGard gave only partial control against Pythium and Rhizoctonia damping-off of bedding plants. In Pennsylvania, Greygold (mixture of four microorganisms) did not provide adequate control of Botrytis on geranium. In Georgia, Pythium and Rhizoctonia diseases of a variety of plants were evaluated with SoilGard and RootShield (Trichoderma harzianum). Disease pressure was low and the results varied from inconclusive to both positive and negative. In addition, SoilGard apparently reduced fresh weight of several plant species. RootShield was reported to both increase root weight in one case and decrease root weight in another. In Connecticut, Rhizoctonia root rot of poinsettia was not significantly suppressed with SoilGard, RootShield, or Earthgro, a suppressive growing medium. However, the authors stated that the results indicated that the biocontrols had promise. Results of additional trials will be presented.

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Craig J. Frey, Xin Zhao, Jeffrey K. Brecht, Dustin M. Huff, and Zachary E. Black

and the percent disease coverage of the remaining foliage. In 2016, seven total assessments commenced on 12 May and continued to 6 July; in 2017, five total assessments were conducted from 10 May to 30 June. Plant disease severity was reported as the

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H.A.J. Hoitink, A.G. Stone, and D.Y. Han