International Congress BIOLOGICAL PRODUCTS - Gruppo di ...
International Congress BIOLOGICAL PRODUCTS - Gruppo di ...
International Congress BIOLOGICAL PRODUCTS - Gruppo di ...
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Fig. 2 – Efficacy evaluation of BCA on overwintering oospore germination.<br />
BCA Efficacy on overwintering<br />
oospore germination.<br />
Not sporulated<br />
42%<br />
Sporulated<br />
58%<br />
N° of sporulated <strong>di</strong>sk<br />
N° days for oospore<br />
germination<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
untreated<br />
112<br />
A strong reduction of the overwintering inoculum could be useful in downy mildew control, in fact new<br />
epidemiological stu<strong>di</strong>es have demonstrated that primary infections play an important role in the <strong>di</strong>sease<br />
development (Pertot et al., 2002). If biocontrol activity of the stu<strong>di</strong>ed micro-organisms is confirmed in field<br />
trials, the combined effect of several BCAs on the <strong>di</strong>fferent biological stages of the pathogen will be evaluated.<br />
In such way BCAs could help in reducing copper quantity in organic viticulture.<br />
Acknowledgements<br />
This work was funded by the Fund for Research of the Autonomous Province of Trento, Italy, Research project<br />
AGRIBIO.<br />
References<br />
Kortekamp A. (1997) Epicoccum nigrum Link: A biological control agent of Plasmopara viticola (Berk. et Curt.)<br />
Berl. et De Toni. Vitis 36 (4), 215-216.<br />
Butt T. M., Jackson C., Magan N. (2001) Introduction- Fungal Biological Control Agents: Progress, Problems<br />
and Potential. In: Fungi as biocontrol Agents. Progress, Problems and Potential. CABI Publishing, Wallingford,<br />
UK, 1-8.<br />
Hill G. () IOBC Bulletin.<br />
Pertot I., Gobbin D., Gessler C. (2002) Epidemiology of Plasmopara viticola: field <strong>di</strong>stribution of primary and<br />
secondary infections in the early stage of the season and microclimate impact on infection severity. In:<br />
Procee<strong>di</strong>ngs of the 4th <strong>International</strong> Workshop on Powdery and Downy Mildew in Grapevine. Napa, California,<br />
U.S.A., September 30-October 04, 2002.<br />
126<br />
BCA which have partially inhibited the<br />
overwintering oospore germination.<br />
98A<br />
119A<br />
35<br />
22A<br />
112<br />
86<br />
2A<br />
2A<br />
69<br />
13<br />
37<br />
93<br />
10A<br />
34<br />
99<br />
Isolate<br />
44<br />
77F<br />
120F<br />
13<br />
37<br />
49A<br />
59A<br />
69<br />
93<br />
10A<br />
untreated<br />
Time for oospore germination in samples treated with<br />
BCA which have which have partially inhibited the<br />
overwintering oospore germination.<br />
Isolate<br />
98A<br />
119A<br />
22A<br />
99<br />
44<br />
77F<br />
120F<br />
59A<br />
35<br />
86<br />
34<br />
49A<br />
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