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EFFICACY AND PHYTOTOXICITY SOME FUNGICIDES IN PROTECTION FROM TOBACCO CROP DOWNY
Milutin Blagojević
; Duhanski institut Mostar
Milojka Nadeždin
; Duhanski institut Mostar
Zdenka Prpić
; Institut za zaštitu bilja, Zagreb
Sažetak
During 1962. efficiency tests of some fungicides against Peronospora tabacina Adam were carried out by tbe Institute for Plant Protection of Zagreb in cooperation with the Institute of Tobacco in Mostar Tests were carried out in hot-houses, sprout-beds and in fields. Besides these efficiency tests the toxicity of these fungicides was also examined. Their chemical bases were: zineb, maneb, ferbam, ziram and tiram as well as some new preparations still under a chiffre. Zineb based preparations with 65% a. t. in suspension formulation save very good resglts without any phytotoxicity in 0,3% concentrations. Zineb based powders with 7,5-10% a. t. give good, results if 4-5 grammes a square metre are applied. Maneb based powders with 7-15% a. t. cause a slight phytotoxicity in tobacco plantations if 3-4 grammes/m² are applied. However, if applied in dosages of higher quantities, they produce severe phytotoxicity in tobacco plantatioins. Maneb based sprayings with 65% a.t. in 0,05- 0,06% concentrations produced mild phytotoxicities of a passing character. Both formulation had a very high percentage of efficiency. Ferbam based preparations in 0,3-0,4% concentrations proved to be very suitable for safeguarding tobacco plantations by creating a very good protection without any phytotoxicity. Tiram based preparations protected well with the 0,4% concentration. Tiram based preparations in 0,2- 0,4% concentrations failed to create protection against tobacco peronospora in plantations.
Ključne riječi
Hrčak ID:
166765
URI
Datum izdavanja:
30.9.1963.
Posjeta: 630 *