DISEASE RESISTANT VARIETY – A WAY OF THE ECOLOGICAL FLAX PROTECTION IN LITHUANIA

Different methods to control flax diseases are admissible in the modern plant protection. It is advised to treat seeds and growing plants by fungicides to kill the pathogens of fungal diseases. Fertilisation by microelements and using of right means of agrotechnology (optimal sowing time, resistant varieties etc.) are preventing plants from physiological injures. However, one of the most effective means against diseases is development and growing of resistant varieties.Fibre flax breeding has been carried out in Lithuania since 1922 in Dotnuva Plant Breeding Station. Since 1965 this work is being done in Upyte Research Station.In this paper we analyse a fibre flax collection in Upyte Research Station and show that some varieties are resistant to most widespread flax fungal diseases

CONCENTRATIONS OF THE MAIN NUTRIENTS (N, P, K, B, ZN) IN FLAX SEED, STEMS AND CHAFF

During 1996-1998 experiments were carried out at the Lithuanian Institute of Agriculture’s Upyte Research Station to measure the contents of the main nutrients (N, P, K, B, Zn) accumulated in flax plants (seeds, stems and chaff) at harvesting on the following backgrounds: not fertilized, fertilized with P20 and N15P20K60; applied with ZnSO4 at the rates from 0,35 to 4,0 kg ha-1. It was determined that fibre flax seeds accumulated 3.30–4.06 % of N, 0.55–0.78 % of P, 0.69–1.15 % of K, 39.5–68.5 mg kg-1 of Zn, 10.00–27.00 mg kg-1 of B, the stems – 0.32–0.88 % of N, 0.04–0.15 % of P, 0.38–1.45 % of K, 5.0–18.0 mg kg-1 of Zn, 5.16–30.84 mg kg-1 of B, the chaff – 0.94–2.34 % of N, 0.20–0.38 % of P, 0.18– 1.40 % of K, 14.5–57.0 mg kg-1 of Zn, 8.55–38.19 mg kg-1 of B. The obtained data could be used for calculating the amount of main nutrients removed from the soil with flax yield as well as for fixing fertilizer rates more precisely