International Congress BIOLOGICAL PRODUCTS - Gruppo di ...

Tab. 1 - Biological Control Agents (BCA) efficacy on sporangia germination and
infection process inhibition.
BCA
% germinated
sporangia
124
Inhibition of infection
process
Level of
inhibition
1 3 yes C
2 2 no A
3 0 no B
4 3 no A
5 4 no A
6 0 no B
7 3 no A
8 0 partial B
9 2 yes B
10 4 yes A
11 0 no B
12 0 no B
13 untreated no -
14 1 no A
15 0 no B
16 0 no B
17 1 yes D
18 1 no A
A) No sporangia germination inhibition as well as infection process.
B) Partial sporangia germination inhibition or infection process.
C) Inhibition of infection process, but no inhibition of sporangia germination.
D) Sporangia germination inhibition as well as infection process.
Twenty micro-organisms have given a good control on conidiophore development (fig.1) with less than thirty
conidiophore/cm2 developed. Best results have been found on oospore germination: 42% of the tested
microorganisms completely inhibited of oospore germination (fig. 2), while the remaining 58% showed some
degrees of efficacy on the oospore germination inhibition and on the time necessary for oospore germination in
optimal conditions.
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