Screening Tests of Fungicides from Plant Origin towards Powdery Mildews from Roses and Cucumbers
A. NIKOLOV1 and I. BONEVA2
1 Agricultural University, Department of Agroecology, BG-4000, Plovdiv, Bulgaria
2 Agricultural University, Department of Chemistry, BG-4000 Plovdiv, Bulgaria
NIKOLOV, A. and I. BONEVA, 1999. Screening tests of fungicides from plant origin towards powdery mildews from roses and cucumbers. Bulg. J. Agric. Sci., 5: 975-978
Study on formulated as fungicides two plant extracts for control of Sphaerotheca fuliginea and Sphaerotheca pannosa. var. rosae has been carried out under greenhouse conditions. It was established that plant extract TO at rates 1% and 2% showed 86% and 93% technical efficiency (T.E) against powdery mildew on roses, the formulated as fungicides TOS in concentration 1% – showed 96% T.E towards the same pathogen. This extract at rate 0.5% and 2% showed between 64% – 93% T.E against powdery mildew on cucumbers and formulated TOS in 1% – 95% T.E resp. The other plant extract AD in rate 0.5% – 1.5% showed between 81% and 91% T.E towards powdery mildew on rose and formulated ADS in 0.5% – 92% T.E. Against Sphaerotheca fuliginea the same extract and in the same concentrations showed between 81% – 90% T.E and ADS – in 0.5% – 94% T.E resp.
Key words: fungicides, powdery, mildews, roses, cucumbers