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• Ragweed, Blessing or Curse?

  51-55

  Endre Pölös

  Ferenc Baglyas

  Viktor József Vojnich

  Views:

  112

  Ragweed (Ambrosia artemisiifolia) has become our most widespread weed. It causes a significant economic damage, on the other hand it causes pollen allergy affecting 20% of the country's population. Therefore its reduction has become a major task. An environmentally friendly method has been developed for its destruction by bioherbicides. This bioherbicid contains allochemical retardants. Allelochemicals are active chemical inhibition ingredients between plants (allelopathy). This method has been applied in the Kiskunság National Park (KNP) and the urban areas in the city of Kecskemét. We also present the typical therapeutic effect of ragweed, widely used in North American Indian culture.

• The Correlation between Nitrogen and Vitamin C Content of Celery in Sandy Soil

  327-331

  Judit Pető

  Imre Cserni

  Attila Hüvely

  Viktor József Vojnich

  Zsuzsanna Tóthné Taskovics

  Views:

  92

  In our series of experiments celery test plants were used in lysimeter type pots. Plant growth, nutrient content and the relationships of them were observed. This publication shows the effects of different doses of nitrogen fertilizer (absolute control, basic +60/120/180 kg/ha N, and the base + 240 kg / ha N (calculated N from manure). The nitrogen content of the celery increased significantly depending on the N-doses; and a strong positive correlation (r = 0.815, p < 0.025 level) was detected in the tubers between N content and vitamin C. Our results establish that in our experimental setup on sandy soil, organic fertilization - enriching the colloid content and improving soil structure - proved to have the most beneficial effects.

• The Effect of Nettle and Bear Garlic Extracts in Biological Control

  309-316

  András Palkovics

  Viktor Vojnich

  Attila Hüvely

  Judit Pető

  Blanka Unyi-Buzetczky

  Views:

  105

  During our research we have made a fermented solution and infusion of two plants, namely nettle and bear garlic. The experiments took place in the exhibition garden at the Horticultural Faculty of Kecskemét College. Kápia paprika was the objective of the experiment. We have collected leaf samples from the experiment units and measured the growth quantity. The nettle and bear garlic extracts have a good effect on the growth quantity and the condition of plants. The injury of Helicoverpa Armigera could have been diagnosed only in the plants of the control group, however this has not occured in the treated groups. According to our research results we recommend using these plant extracts in practice for the purpose of biological control and nutrient supply.

• The Examination of Sandy Grassland Plant Communities in Kunpeszér

  56-62

  Viktor József Vojnich

  Ferenc Baglyas

  Endre Pölös

  Views:

  79

  Our tests were carried out in Kunpeszér, in the territory of the Kiskunság National Park. The coenological recordings were made in 2x2 meter quadrates. We found out the species’ composition and coverage. In the test area mostly Achilleo-Festucetum pseudovinae (grass saline desert) grassland was located. The grassland vegetation flora was degraded by anthropogenic effects (trampling, grazing). The following weeds spread: ragweed (Ambrosia artemisiifolia);
  canadian horseweed (Conyza canadensis); poppy (Papaver rhoeas); white goosefoot (Chenopodium album); hairy pigweed (Amaranthus retroflexus) and prickly plants: spiny restharrow (Ononis spinosa), and field thistle (Eryngium campestre).