Effect of Some Fungicides upon Causes of Charcoal Rot of Sunflower

V. ALEXANDROV

Complex Experimental Station, BG – 8600 Yambol, Bulgaria

Abstract

ALEXANDROV, V., 2000. Effect of some fungicides upon causes of charcoal rot of sunflower. Bulg. J. Agric. Sci., 6: 175-178

Under laboratory conditions the effect of some fungicides upon the charcoal rot's causes was tested. The fungicides metil-topsin 70NP supperess the growth of the pathogen's mycelium, but the preparation ronilan 50NP doesn't influence it.
The fungicides, which showed a suppresing effect upon the pathogen in vitro were comparatively tested in the period 1995-1996 under field conditions. The tested preparations showes low effectiveness (from 7,3% to 14,9%) upon the size of attack by the disease and that's why they cann't be applied in order to control it.

Key words: sunflower, charcoal rot, fungicide