ISHS


Acta
Horticulturae
Home


Login
Logout
Status


Help

ISHS Home

ISHS Contact

Consultation
statistics
index


Search
 
ISHS Acta Horticulturae 842: VI International Strawberry Symposium

SOIL SOLARIZATION ENHANCEMENT WITH HIGH TUNNELS IN SOUTHERN CALIFORNIA

Author:   K.D. Larson
Keywords:   Fragaria × ananassa, methyl bromide, mulch, strawberry, weed control
DOI:   10.17660/ActaHortic.2009.842.216
Abstract:
Soil solarization can be an effective preplant soil treatment under high temperature and irradiance conditions, but its effectiveness is poor in coastal California due to cool, cloudy conditons. Previous reports indicate that use of polyethylene tunnels can enhance soil warming beyond that of standard soil solarization. From August 31 to October 4, 2007, we monitored soil temperatures as a function of three solarization treatments on non-fumigated strawberry beds in coastal southern California: 1) black polyethylene bed mulch (BP); 2) clear polyethylene bed mulch (CP, control); and 3) a high tunnel covered with clear polyethylene that enclosed beds covered with CP (CPT). Maximum soil temperatures (10 cm depth) were 45.4, 53 and 57.9°C for treatments 1-3, respectively. At 10 cm soil depth, accumulated temperature-hours ≥37°C were 82.5, 235, and 520.3 for treatments 1-3, respectively, while at soil depth of 30 cm, accumulated temperature-hours ≥37°C were 0, 51.5 and 525 for treatments 1-3, respectively. The tunnel cover was removed on October 4 and strawberry plants (‘Ventana’) were established in all plots. Weed populations were determined on November 15, and yield performance determined from December, 2007 until May 5. Results indicate complete weed control with use of CPT, and an abundance of various weed species in CP and BP plots. Yields to May 5 were lowest for BP treatment, intermediate for CP and CPT treatments, and greatest for an adjacent parcel treated with methyl bromide: chloropicrin.

Download Adobe Acrobat Reader (free software to read PDF files)

842_215     842     842_217

URL www.actahort.org      Hosted by KU Leuven      © ISHS