Comparison between yellow-flowering hybrid WOSR varieties and white-flowering OP variety Witt in Flower Power System crop management in Agro Rubín a.s.

Goal of this thesis is to compare yellow flowering hybrid WOSR varieties growth in conventional agriculture to white flowering OP variety growth in Flower Power System (FPS). We also have to confirm/deny that OP variety Witt is at least the same profitable as hybrid varieties (HV), due to the ecological and economical advantages of the FPS. The effect of FPS is in growing Witt variety sown around by earlier yellow flowering variety buffer strip. The yellow flowering strip should be wide as minimum as plant protection sprayer, in this case it was 24 m. The buffer strip was sown by OP variety Cortes. Primary tillage plowing was done immediately after the forecrop of winter barley harvest and after application of organic manure - pig manure on crushed straw. Sowing all studied varieties was conducted in the period 11th to 21st August 2014. Autumn crop emergence and development carried out evenly, no significant pest damage was observed, due to the warm weather was needed triple application of morphoregulator. To winter crops entered with a sufficient number of true leaves, strong root neck and joined rosette of leaves. Spring crop development launched very soon, thanks to a mild winter hibernating varieties by 91-96% plants. Applications of DASA took place in early March, the first application of DAM 390 in the second half of March. Flowering took place in an average of month, March 29 - May 30, 2015. Application of insecticides was carried out on all varieties 1x in the bud stage, the second one in bloom against gall midges (Dasineura brassicae) was dropped due to a weak incidence, so did not show the expected effect of FPS. Harvest was initiated due to the very hot and dry weather on the 21st of July 2015. The overall average yield was 4.64 t8%/ha. Witt yield was 4.64 t8%/ha and buffer strip variety Cortes 4,62 t8%/ha and the HV 4.67 t8%/ha (4.19 to 5.01 t8%/ha). Plant protection products profitability for a variety Witt reached 87.10%, the average HV 87.49% (86.10% to 88.46%). The numbers show us that the OP variety Witt does not reach at least the same profitability as the HV, but when compared with some specific HV is significantly overcome, which is at OP variety interesting. When comparing the content of fat acids, Witt contains almost the same proportions of fat acids as Cortes. That gives no reason to reach higher prices when selling Witt seeds, so you cannot count on this advantage as stated by the dealer. But in conjunction with lower environmental burden on bees and other non-target organisms, the variety Witt seems to be a very interesting choice