Agriculture Reference
In-Depth Information
Fig. 8.5
Biocontrol assay of
Sclerotinia minor
on lettuce by two bacteria antagonistic strains
belonging to
Bacillus methylotrophicus
and
Bacillus amyloliquefaciens
species isolated from com-
post amended soils
in more stable and complex structures chemically fractionable in humic and fulvic
acids and humates. Siddiqui et al. (
2009
) concluded that the efficiency of palm oil
compost derived humic acids, studied in controlling
Choanephora cucurbitarum
growth, was related to their concentration and carboxylic group content evidenced
by FTIR spectra. Humic substances were assessed for In-vitro inhibition of two
strains of
Fusarium oxysporum
(Loffredo et al.
2007
). While, Loffredo et al. (
2008
)
found that humic acid fractions (HAs) isolated from a mixture of an olive-oil-mill
wastewater sludge after composting, caused the mycelial growth inhibition of
Sclerotinia sclerotiorum
related to some chemical and functional properties of HS.
Instead, the same HS treatments, generally did not inhibit the growth of the two an-
tagonistic strains of
Trichoderma
viride
and
T. harzianum
. Phenolic phytochemicals
with high antioxidant activity was extracted from black tea compost extracts (Nor
Qhairul Izzreen and Mohd Fadzelly
2013
). Pane et al. (
2013
) reported the implica-
tion of phenolic C compost fraction in suppressivity. A previous study showed the
high potential of naturally occurring chemicals present in two-phase olive mill waste
composts in suppression of a set of phytopathogenic fungi (Cayuela et al.
2008
).
8.7
Compost Extracts, Leachate and Teas
Compost derived liquid products including aqueous extracts and aerated or non-
aerated brewed teas, have a promising role in plant disease control. These organ-
ic formulates, reported in the majority of the cases simply as compost teas, are
