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• Use of Clearfield technology in the sunflower

  114-118

  István Kristó

  István Makó

  Mária Gazdagné Torma

  Views:

  92

  Sunflower is one of the most important cultivated plants in Hungary. We carried out our research in 2009 with eight imidazolinone resistant hybrids and one conventional variety in order to compare the efficiency and selectivity of Clearfield technology to the conventional system. In the trial the Clearfield hybrids were treated by 3,5 l/ha Wing-P (pre) and 1,2 l/ha Pulsar 40 SL(post). The plot of the conventional variety was sprayed by 4,0 l/ha Wing-P and 0,5 l/ha Goal Duplo (pre).
  Wing-P also had a poor effect because of the lack of rain. Pulsar 40 SL gave an excellent result against the 2-6 leaves of monocotyledonous and the dicotyledonous weeds. Only the well-developed Hibiscus trionum survived the treatment. The combination of Wing-P and the Goal Duplo herbicide provided poor result against the caracteristical weeds of the experimental area because of the lack of rain. Oxifluorfen with contact effect burned the leaves of the sunflower.

• Comparative analysis of maize weed control system and the competitive effect of sorghum

  97-104

  István Kristó

  Mária Gazdagné Torma

  Éva Rozik

  István Dávid

  Views:

  110

  In our investigation we used different weed control technologies in the different phenology states of the maize. The experiment have been
  carried out in Hódmezővásárhely, in the Experiment garden of the Pilot farm of University of Szeged Faculty of Agriculture, on meadow
  chernozem soil, on 24 m² plots, in 3 replications, randomized blotch design. The experiment can be regarded as 15 weed-control strategies
  where, in addition to the untreated control, six chemicals or chemical-combinations are applied (Spectrum 720 EC, Motivell Turbo D,
  Stellar + Dash HC, Clio + Akris SE + Dash HC, Clio + Dash HC) in five different times (pre, early post, post and two late post) and eight
  mechanical weed-control technologies were used. Hoeing took place connected to the herbicide treatments in different times: until 2-3-leave
  age weedless, in 3-4-leave age hoed once, from 3-4-leave age weedless, in 6-7-leave age hoed once, from 6-7-leave age weedless, in 8-leave
  age hoed once, from 8-leave age weedless.
  Our results were assessed by chemical efficiency examination, maize length measurement, corncob-length and fertility examination,
  Sorghum plant-number determination and yield weighing carried out in four periods. The data were evaluated by a one-factor analysis of
  variance and a two-factor linear regression analysis.

• Usage of microbiological products in the protection of the sunflower

  36-40

  István Kristó

  Kálmán Erdei

  Imre Máté

  Views:

  85

  White mould is the most important desease of sunflower. We are not able to grow sunflower on the same area for 5-6 years, because of sclerotia. One of the protection methods is if we destroy the sclerotia in the soil with hyperparasite microorganisms, so we can reduce the comeback time of sunflower.

  We carried out our farm size researches through 3 years, with the most important sunflower hybrids of Hungary in the area of Vásárhelyi Róna Kft. We can conclude that the microbiological products (Koni, Trifender, Mico’sol) effect positively on the yield of sunflower hybrids, but the weather (moisture) can significantly modify this effect.