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2007, vol. 43, iss. 1, pp. 329-339
Current study and new technologies in field crops protection
aInstitute of Field and Vegetable Crops, Novi Sad
bUniversity of Novi Sad, Faculty of Agriculture
Keywords: Pyrenophora tritici-repentis; wheat; Sclerotinia sclerotiorum; Koni WQ biopreparation; sunflower; sugarbeet; corn; wireworms (Elateridae larvae); beet leaf aphid; western corn rootworm; seed treatment; insecticides; Clearfleld*System; Duo System; tribenuron methyl
Abstract
In 2005 and 2006, the agent of tan spot, Pyrenophora tritici-repentis, was registered in high intensities in several locations u Serbia. Under conditions of natural infection, lowest disease intensities were observed in the winter wheat cultivar Simonida (trace). Most sensitive to P.tritici-repentis were the durum wheat cultivars Durumko and Dusan, rated 03 and exhibiting the infection intensity of 40%, while the triticale cultivar Odisej was rated 03 and the infection intensity in traces, to 5%. The application of the biological fungicide Koni WQ, which contains Coniothirium minitans spores in an inactive substrate, showed that the permanent inactivation of sclerotia amounted to about 67%, in response to the action of the fungicide's active agent. Most of the insecticides used for seed treatment provided a significantly better sugarbeet stand that the untreated control. Due to their systemic action, imidacloprid, thiamethoxam and their mixtures with fipronil provided very good protection of young plants against beet leaf aphid and less efficient protection against beet weevil. All insecticides for corn seed treatment provided significant reductions in the extent of root damage by western corn rootworm larvae. Institute of Field and Vegetable Crops has intensive programs of development of sunflower and corn hybrids tolerant to certain herbicides. Tests are conducted on possibilities of weed control by means of herbicide protectants. In Serbia special interest was raised by the sunflower tolerant to imidazolinones (Clearfield*sytem) and tribenuron methyl and the corn tolerant to cycloxydim (Duo System).
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article language: Serbian
document type: Professional Paper
published in SCIndeks: 21/07/2007

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