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Soil Solarization as a Component of an Integrated Program for Control of Raspberry Root Rot
J N Pinkerton1, P R Bristow2, G E Windom2
1USDA-ARS, HCRL, Corvallis, OR 97330.
Plant Disease
|February 16, 2019
Summary
Soil solarization effectively controls Phytophthora root rot (PRR) in raspberries by lethal heat exposure. Combining solarization with raised beds and gypsum enhances raspberry growth and survival in the Pacific Northwest.
Area of Science:
- Plant Pathology
- Horticulture
- Soil Science
Background:
- Phytophthora root rot (PRR) significantly impacts raspberry cultivation.
- Effective management strategies are crucial for raspberry production.
Purpose of the Study:
- To evaluate the efficacy of soil solarization for controlling Phytophthora root rot (PRR) in raspberries.
- To determine lethal exposure times for Phytophthora rubi at various temperatures.
Main Methods:
- Conducted field and growth chamber studies from 2000-2005.
- Assessed lethal exposure times of Phytophthora rubi cultures at temperatures ranging from 20-35°C.
- Evaluated soil solarization in combination with raised beds, gypsum amendments, and fungicides in field trials.
Main Results:
- Temperatures ≥29°C were lethal to Phytophthora rubi, with exposure times decreasing as temperature increased.
- Soil solarization significantly increased primocane growth and survival of susceptible raspberry cultivars.
- Combined treatments of solarization, raised beds, and gypsum showed superior results compared to other treatments.
Conclusions:
- Soil solarization is an effective component of integrated PRR management in the Pacific Northwest.
- Integration with raised beds and gypsum amendments can enhance the effectiveness of soil solarization.
- Further research may explore optimal combinations for sustainable raspberry production.
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