Author
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Zasada, Inga |
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Martin, Robert |
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PSCHEIDT, JAY - Oregon State University |
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Weiland, Gerald - Jerry |
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PEEVER, TOBIN - Washington State University |
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Submitted to: Book Chapter
Publication Type: Book / Chapter Publication Acceptance Date: 1/18/2019 Publication Date: N/A Citation: N/A Interpretive Summary: This chapter discusses the major diseases of red raspberries in the Pacific Northwest. For most diseases, the causal organism, symptoms, disease cycle, and management tactics are covered. Cultural practices and other nonchemical approaches to disease control are emphasized. Technical Abstract: Researchers estimate that diseases reduce raspberry crops by 10 to 14% in most years. In years when weather conditions favor fruit rots, losses can be much higher. Diseases other than fruit rots also cause problems. Raspberry crumbly fruit, for example, not only reduces fruit quality but also requires more frequent replanting. To maintain yields and high fruit quality, some virus-infected ‘Meeker’ fields are replanted after the sixth or seventh harvest season, as compared with about 15 years for healthy plants. Additionally, if plant-parasitic nematodes are left untreated prior to replanting, > 25% reduction in productivity can occur within two years of planting. Phytophthora root rot also causes significant losses. In fields with poor drainage, most plants may be killed within a few years and yield losses can approach or exceed 50%. |
