Strawberry diseases are commonly controlled by soil fumigation
with toxic chemicals. However, we have tested soil biosolarization, a new technique
combining soil biofumigation and soil solarization, to cultivate the Camarosa
strawberry in southwestern Spain.
Soil was biofumigated by amendment of fresh chicken manure at
12,500 kg/ha; chicken manure at 25,000 kg/ha; Brassica juncea pellets at 2,000 kg/ha; sugar beet vinasse at 15,000 kg/ha; or dried
olive pomace at 12,500 kg/ha. Soil was then solarized for 30 days by
covering with a clear plastic mulch. The highest yield
averaging 70,543 kg/ha and the lowest percentage of 12.6 % of
second-class fruits were obtained by amendment of fresh chicken manure.
Yields were similar to yields reported for
chemical fumigation. In
addition, biosolarization is about 20 % cheaper than chemical treatment.