INTRODUCED CUCUMBER CULTIVARS RELATIVELY RESISTANT TO PSEUDOPERONOSPORA CUBENSIS IN BULGARIA

S. Neykov, D. Dobrev
In Bulgaria cucumber is one of the oldest vegetable crops which is cultivated on small areas but everywhere. It is the widest spread crop in glasshouses where long-fruit cultivars are grown. In open air growing of middle-fruit and small-fruit cultivars for processing is preferred. Cucumbers for processing are grown in the summer-autumn period and in glasshouses as a catch crop.

In the last years, production of small-fruit cucumbers destinated to processing increased and they are very much demanded both at the home and international market. In this country there are many studies on the agrobiological and economical qualities of the small-fruit and middle-fruit cultivars /1,2,3,5,6,7,11,12,13,14,15/.

In the period of 1980–1986, we introduced and studied 650 cucumber samples derived from different geographic centres in the world. Our aim was study and preserve this material and to supply bearers of valuable economic qualities to plant breeding purposes.

As cucumber is very susceptible to diseases and almost every year is attacked generally in July and August by Pseudoperonospora cubensis, which after Bohn et al. /1964/ causes, under favourable conditions death of plants up to 100%, the purpose of the present research was to identify resistant cultivars.

In years of epidemics it destroys leaf mass, yields decrease significantly, and most effective way to control this disease consist of using resistant cultivars /9,10/.

In this country, there are no communications for studying the resistance of cucumber to this disease except for the study of Angelov /1982/.

Neykov, S. and Dobrev, D. (1988). INTRODUCED CUCUMBER CULTIVARS RELATIVELY RESISTANT TO PSEUDOPERONOSPORA CUBENSIS IN BULGARIA. Acta Hortic. 220, 115-120
DOI: 10.17660/ActaHortic.1988.220.16
https://doi.org/10.17660/ActaHortic.1988.220.16

Acta Horticulturae