the pathogen
densities in the rhizoplane soil significantly decreased in all
BIOs treatments except BIOIn + BIOIIp, compared to control plants
(Fig. 4A). Furthermore, melon wilt incidence was closely related
to FOM densities in plant shoots (R
2
= 0.9535), roots (R
2
= 0.9542),
and the rhizoplane soil (R
2
= 0.7191). For example, when the
disease incidence was 70% in treatment OFn + BIOIIp (Fig. 2A),
the corresponding FOM densities were 3.77×10
4
, 1.7×10
4
, and
1.68×10
5
cfu g
−1
in plant shoots, roots, and the rh