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Minkov P.,Research Institute of Mountain Stockbreeding and Agriculture
Acta Horticulturae | Year: 2013

Basic mother nursery from the blackcurrant cultivars 'Ometa', 'Titania', 'Hedda' and 'Silvergieters Schwarze' (Ribes) was put to procedures for biological certification based on complete excluding of mineral fertilizers and use only of permitted means for plant protection. Conversion has started since 2007, and in 2010 a certificate was obtained from the licensed company "Balkan Biocert" for biologically certified planting material, with which plantations for biological fruit production can be established. Rooting of mature cuttings from cultivars 'Ometa', 'Titania', 'Hedda' and 'Silvergieters Schwarze' took place under the same conditions. The results of the conducted observations showed that the percentage of rooting of the cultivars varied from 70% ('Hedda') to 96% ('Titania') obtained planting material had acceptable quality.

Dragoyski K.,Research Institute of Mountain Stockbreeding and Agriculture
Acta Horticulturae | Year: 2011

During the period of 23 years up to now, in RIMSA in Troyan, experiments for establishment and maintenance of two scion orchards of plums were carried out. The first orchard was established in 1988, with 318 trees of plum cultivars basic for the country. For a 15-years period of usage (till 2003), 17 mother trees infected with Plum pox virus (PPV) were registered and eradicated. In 2001, the second scion orchard was established, in the area of Boyadjievo, with 52 cultivars of 7 fruit species, including 11 plum cultivars, presented by 476 mother trees. Up to this moment 12 trees (2.52%) infected with PPV in the orchards were registered and eradicated. The experiment shows us that the maintenance of such scion orchards is possible if some minimum conditions are followed, such as: space isolation of the orchard from existing plantations and wild species of genus Prunus - 800 m; grass regeneration of the soil surface with cereal grasses; vector chemical control; permanent observation for symptoms appearance; annual testing of at least 1/3 rate of the mother trees serologically by double antibody sandwich (DAS)-ELISA.

Kamenova I.,Agrobioinstitute Dragan Tzankov Blvd. | Milusheva S.,Bulgarian Fruit Growing Institute | Dragoyski K.,Research Institute of Mountain Stockbreeding and Agriculture | Borissova A.,Institute of Agriculture | And 3 more authors.
Acta Horticulturae | Year: 2011

Since first being recorded in Bulgaria in 1917-1918 and described as a viral disease in 1932 (Atanasoff, 1932/1933) sharka (Plum pox) disease has progressively spread via infected plant material to be present nowadays all over the country. This overview is an attempt to synthesize almost 80 years of sharka disease investigations in Bulgaria in several aspects as: economical importance, hosts, diagnosis, identification and strain characterization of the pathogen, aphid vectors and the control measures applied. Overall, the history of PPV control in Bulgaria is one of unsuccessful eradication but successful spreading and contamination.

Kamenova I.,AgroBioInstitute | Mavrodieva V.,U.S. Department of Agriculture | Levy L.,U.S. Department of Agriculture | Milusheva S.,Bulgarian Fruit Growing Institute | And 3 more authors.
Bulgarian Journal of Agricultural Science | Year: 2013

Plum pox virus (PPV), the causal agent of sharka disease affecting the major stone fruit species is endemic in Bulgaria. To investigate PPV incidence level and distribution on sweet cherry (Prunus avium) and sour cherry (P. cerasus) 28 commercial and abandoned orchards were surveyed in 2009 and 2010, as well as some residential and wild cherries. A total of 1141 samples from individual tree were collected and tested using a commercial DAS-ELISA detection system. Some samples were subjected to additional testing by RT-PCR using PPV-specific primers. A commercial sweet cherry sample showing PPV-like symptoms, e.g. chlorotic rings and spots on the leaves and fruits was bud-grafted on GF305 hybrid peach woody indicator seedlings and tested by RT-PCR. PPV was not detected in any samples using serological and/or molecular based tests. Nevertheless, periodic systemic surveys should be conducted to evaluate PPV disease status of sweet and sour cherries in Bulgaria.

Lingorski V.,Research Institute of Mountain Stockbreeding and Agriculture | Kertikov T.,Institute of Forage Crops
Emirates Journal of Food and Agriculture | Year: 2014

Comparative testing of some annual untraditional drought-resistant cereal (foxtail millet and true millet) and legume crops (bitter vetch and chickpea) was conducted during 2011-2013 in the Research Institute of Mountain Stockbreeding and Agriculture (RIMSA) in Troyan (Bulgaria). The largest part of the forage yields had the stems in comparison with leaves and inflorescences. The chickpea had more green mass (12.82 t ha-1) and dry mass (3.27 t ha-1) yields than bitter vetch - respectively by 18.46% and 18.48%. Regarding the cereal crops it turned out that the true millet had more yields (12.98 t ha-1 green mass and 3.32 t ha-1 dry matter) than the foxtail millet (respectively 16.80% and 11.14%). Judging from the factual data it can be considered that the forage species studied in details are suitable for ecological fodder preparation in foothill regions of the Central Balkan Mountains in Bulgaria.

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