2.11. Monitoring of iconomicaly important cherry diseases in organic orchard and development of alternative control system. I. In vitro test of fungicides for control of Monilia laxa Sacc. & Vogl.

It has been tested in vitro some sulfur and cupper fungicides on conidia germination of Monilia laxa Sacc. & Vogl. The purpose was to be chosen chemical compounds, suitable for control of cherry brown rot in organic production system.
It has been found out that Bordeaux mixture 2% and Lime sulfur 1:50 (2%) had very high inhibition coefficient of conidia germination, more than 99%. Next to them was the effect of colloidal sulfur (97%), prepared by 1l Lime sulfur and 50-60g ferry sulfate per 100l water (Кръстев, Тафраджийски, Кръстева, 1964). The effect of Bordeaux mixture 1% and Kocide DF 0,18% was not enough good. The coefficient of inhibition of conidia germination was 77-79%. Suggested control scheme involved Bordeaux mixture 2% for winter spray, Lime sulfur 1:50 – for preblossom spray and Colloidal sulfur – for post blossom treatments.