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Joint International Conference on Long-term Experiments ...

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The Tentant variety positively reacted to five treatments, and had a neutral reacti<strong>on</strong> to<br />

the other applied treatments. The Robusta variety positively reacted to the treatment<br />

with nutritive clay, where recorded the attack degree was 0 (zero), to other two<br />

products, and a negative reacti<strong>on</strong> to the other applied treatments. The Agatha variety<br />

positively reacted <strong>on</strong>ly to <strong>on</strong>e product, negatively to <strong>on</strong>e product, too, and neutral to the<br />

others. The Rivera variety positively reacted to <strong>on</strong>e product, negatively to <strong>on</strong>e product,<br />

and neutral for the rest of them. In the other varieties a negative reacti<strong>on</strong> was recorded.<br />

DISCUSSIONS<br />

The well-known copper based classical products (copper oxychloride 4kg/ha, copper<br />

hydroxide 4kg/ha, copper sulfate in associati<strong>on</strong> with lime 1%) are efficient in potato<br />

blight c<strong>on</strong>trol. The other tested products susceptible of favorable effects due to their pH,<br />

pellicle protecti<strong>on</strong> or other properties were not efficient, except the variant with whey<br />

1/1.<br />

Within experimental c<strong>on</strong>diti<strong>on</strong>s, the lowest potato blight attack was emphasized in<br />

Amelia and Robusta variety, and the lowest alternariosis attack in Sante, Robusta and<br />

Rozal varieties, which recommend them as suitable for organic agriculture.<br />

Am<strong>on</strong>g the tested varieties, five are suitable to be used in organic agriculture: Robusta,<br />

Rozal, Redsec, Amelia and Sante. High producti<strong>on</strong> and degree of blight and alteriosis<br />

resistance characterize these varieties during testing c<strong>on</strong>diti<strong>on</strong>s. Further research is<br />

needed in order to identify other varieties suitable to be used within organic agriculture<br />

system.<br />

The use of unc<strong>on</strong>venti<strong>on</strong>al products susceptible to have properties against potato<br />

pathogenic agents or capacity of their attack limitati<strong>on</strong> represents an alternative which<br />

can be developed within the c<strong>on</strong>text of implementati<strong>on</strong> and extensi<strong>on</strong> of the sustainable<br />

and organic agriculture system.<br />

REFERENCES<br />

D<strong>on</strong>escu D., Enoiu, M., Frâncu G., Plămădeala, B., Popescu, A. (1996): Ghid practic<br />

de protecţie a cartofului. Ed. Ceres, Bucureşti<br />

Morar, G., Fiţiu, A., Cernea, S., Vâtcă, S. D., Oltean, M. I., Sârbu Camelia (2003):<br />

Tehnologii în agricultura ecologică, Ed. Risoprint, Cluj-Napoca<br />

Oroian, I. (2003): Protecţia şi nutriţia plantelor, Ed. AcademicPress, Cluj-Napoca<br />

Oroian, I., Fiţiu, A., Florian, V., Carmen Puia, Dumitraş Adelina, Roiban, G.,<br />

Paulette Laura (2003): C<strong>on</strong>trolul patogenilor în agricultura ecologică,<br />

Ed. AcademicPress, Cluj-Napoca<br />

Plămădeală, B. (1999): Mana cartofului. Biologie şi c<strong>on</strong>trol, Ed. Ceres, Bucureşti<br />

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