ИЗСЛЕДВАНИЯ ВЪРХУ ПОЛСКИТЕ КУЛТУРИ
издание на
ДОБРУДЖАНСКИ ЗЕМЕДЕЛСКИ ИНСТИТУТ
гр. Генерал Тошево
 

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Публикационнен процес
Статия
 Пълна версия ORIGINAL PAPER
 
Impact of the predecessors on the phytosanitary status and the productivity of wintering oats (Avena sativa L.) in the organic farming
  Dina Atanasova • Vasilina Maneva • Milen Chanev  
Institute of Agriculture - Karnobat, Karnobat, Bulgaria
 
     Резюме
 
The Certified Organic Field was conducted an experience with wintering oat variety Kehlibar, sown after chickpeas, lentils, potatoes and pumpkins. The aim of the experiment was to assess the influence of the predecessors on the productivity and phytosanitary status of wintering oats in organic farming. For organic wintering oats, the best predecessor was a lentils (366 kg.da-1), followed by chickpeas (345 kg.da-1). The yield was high and the level of weed infestation was relatively low. The lowest yield and the highest level of weed infestation were after the predecessors potatoes (295 kg.da-1) and pumpkins (261 kg.da-1). During the study period, there was no tendency for the predecessor to influence the disease attack. At the highest density, the pests of the three ranks were seen after predecessors of chickpeas and lentils. The greatest differences in the attack after the predecessors were observed in the order of Hemiptera. Predecessors do not affect the species composition of the pests, but mainly their density.

Key words: Diseases, Organic farming, Oats, Pests, Phytosanitary status,

Predecessors, Weeds