Sanitary and physiological quality of soybean seeds treated with essential oils
The seeds are usually infested by pathogens, where in addition to commercial chemical control, alternative controls have been sought. Thus, the effect of essential oils extracted from the leaves of the hybrid Eucalyptus tereticornis x E. urophylla (HEtu) and E. grandis x E. urophylla (HEgu) in the s...
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Veröffentlicht in: | Revista de ciências agrárias 2022-11, Vol.45 (3), p.125-135 |
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Zusammenfassung: | The seeds are usually infested by pathogens, where in addition to commercial chemical control, alternative controls have been sought. Thus, the effect of essential oils extracted from the leaves of the hybrid Eucalyptus tereticornis x E. urophylla (HEtu) and E. grandis x E. urophylla (HEgu) in the sanitary and physiological quality of soybean seeds was evaluated. The sanity test was conducted out in CRD, 2x5 factorial scheme (two essential oils extracted from the leaves of HEtu and HEgu, with five doses: 0; 0.5; 0.75; 1.0 and 2.0 µl.mL-1). And physiological quality in CRD, with a 2x4+1 factorial scheme, consisting of two essential oils mentioned above, in four doses (0.5, 0.75, 1.0 and 2.0 µl.mL-1), plus an additional control treated with ADW. Both oils are efficient in controlling the genera Fusarium and Cladosporium, with better results at doses 1.0 and 2.0 µl.mL-1. HEgu oil showed greater sanitary control; however, HEtu oil was superior for all the physiological variables. Despite the greater efficiency in sanitary control, HEgu oil negatively alters the physiological quality of the seeds, while HEtu oil at a dose of 2.0 µl.mL-1, in addition to the efficiency in phytosanitary control, does not affect the physiological quality of the seeds.
As sementes de soja geralmente são infestadas por fungos, e a desinfestação tem sido realizada principalmente com fungicidas sintéticos, porém, tem-se buscado controles alternativos, entre eles, óleos essenciais. Assim, avaliou-se o efeito de óleos essenciais extraídos das folhas dos híbridos Eucalyptus tereticornis x Eucalyptus urophylla (HEtu) e Eucalyptus grandis x Eucalyptus urophylla (HEgu) na qualidade sanitária e fisiológica de sementes de soja. O teste de sanidade foi conduzido em delineamento inteiramente casualizado (DIC), esquema fatorial 2x5 (dois óleos essenciais, em cinco concentrações: 0; 0,5; 0,75; 1,0 e 2,0 μL.mL-1), as sementes foram colocadas em caixas gerbox em incubadora a 20 ºC por sete dias, os fungos foram identificados de acordo com sua morfologia. A qualidade fisiológica foi avaliada em DIC, esquema fatorial 2x4+1, sendo: dois óleos essenciais, em quatro concentrações (0,5; 0,75; 1,0 e 2,0 μL.mL-1), mais uma testemunha adicional tratada com água destilada autoclavada, após oito dias foram avaliadas a Percentual de germinação, Percentual de plântulas anormais e Percentual de sementes mortas. Os óleos mostram-se eficientes no controle dos gêneros Fusarium e Cladosporium, especialmente nas conce |
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ISSN: | 0871-018X 2183-041X |