Published in Scientific Papers. Series A. Agronomy, Vol. LXI, Issue 1
Written by Aurelian PENESCU, Mariana BRAN, Mihaela NICHITA, Nicolae IONESCU, Dumitru Ilie SANDOIU, Costica CIONTU, Tudor SCHIOPU, Mihai GADEA, Cosmin SONEA, Ciprian BOLOHAN
The sunflower is the most important cultivated plant in Romania for production of addible oil by seeds processing. The cultivated areas have increased a lot recently, ranging between 0.7-1 milions hectares. With the increase of the cultivated areas in the past years, the structure of the hybrids has changed very much. The hybrids cultivated by CONVENTIONAL technology decreased at the expense of hybrids resistant to Imazamox herbicide, type IMI, the cultivation technology being named CLEARFIELD and resistant to herbicide Tribenuron-methyl, the cultivation technology being named EXPRESSUN, named by the commercial brands of the herbicides. We may say with no fear of making mistakes that the cultivated area with conventional hybrids is very small, compared to the areas cultivated with the two hybrids resistant to the two herbicides mentioned. This situation leads to the fact that the weeds and their control became one of the most difficult to manage problems in sunflower culture. This is the reason for which we have initiated three years ago a study at the Experimental Didactic Centre from Moara Domneasca for the period 2015-2017, in order to reveal whether there are any differences among the three types of cultures as regards the obtained yields, what is the effect on weed control level and specially if the application of these herbicides in different periods has any influence on post emerging crops (remaining effect) in crop rotation process.
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