Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 2
Written by Andreea-Raluca CHIRIAC, Stelica CRISTEA
In infested fields, Orobanche cumana Wallr. causes severe yields and quality losses. In this study, several commercial sunflower hybrids were analyzed. All the tested hybrids presented different levels of infestation, depending on the resistance genes of the used assortment. The hybrid Performer, without resistance genes, presented the highest attack rate, with an average attack rate of 3.09% and the lower attack rate was recorded in case of the hybrid LG 50.635 CLP, with an average attack rate of 0.19%. The highest production (kg/ha) was recorded for the SY BACARDI CLP hybrid, with an average yield per variant of 2493.4 kg/ha (tolerant to Orobanche cumana Wallr. up to breed E), and at the opposite pole, the highest production being registered for the hybrid LG 55.55 CLP, with 3235.3 kg/ha (resistant up to breed G). Regarding the percentage of oil, the lowest values have been recorded in case of hybrids ES JANIS and PERFORMER, with an oil percentage of 44.4%.
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