engleski

Influence of desiccation on germination and field emergence of sunflower

In this paper we present results on the influence of desiccation on laboratory germination and field emergence of sunflower hybrid Favorit and its parental lines. As desiccants we used Reglone forte [diquat] (3 l/ha) and Harvade 25F [dimethipin] (2 l/ha), with water usage of 500 l/ha. Desiccation was done on August 20, 2006, and, after 20 days, the genotypes were harvested. In each trial variant (combination of genotype and treatment) laboratory germination was performed on four subsequent dates with 2-month intervals. With relation to the control, the Harvade 25F variant had a statistically significant higher germination of 4.38%, while the Reglone forte variant had a statistically significant higher germination in relation to both, control and Harvade 25F, of 7.32% and 2.95%, respectively. Regarding field emergence, differences among the treatments were small, statistically non-significant. Like in the laboratory germination test, Reglone forte treatment had the highest field emergence (78.55%) which was higher than the control and Harvade 25F in 2.94% and 2.86%, respectively.

desiccation; field emergence; Harvade 25F; laboratory germination; Reglone forte; sunflower

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