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Efeitos da temperatura e regime de luz sobre Corynespora cassiicola e da temperatura e período de molhamento foliar no desenvolvimento da mancha-alvo em acerola

Authors: Celoto, Mercia Ikarugi Bomfim; Papa, Marli De Fátima Stradioto; Celoto, Fernando Juari; Santos, Juliana Aparecida Dos; Pereira, Wagner Vicente;

Efeitos da temperatura e regime de luz sobre Corynespora cassiicola e da temperatura e período de molhamento foliar no desenvolvimento da mancha-alvo em acerola

Abstract

RESUMO O presente estudo teve como objetivos: (i) determinar, in vitro, o efeito da temperatura sobre o crescimento micelial (10 a 35oC) e a germinação de conídios (10 a 45oC) de Corynespora cassiicola ; (ii) avaliar, in vitro , o efeito do regime de luz (luz contínua, fotoperíodo de 12 h e escuro) sobre o crescimento micelial, a esporulação e a viabilidade dos esporos de C. cassiicola ; e (iii) verificar, in vivo , a influência da temperatura (20 a 30oC) e da duração do período de molhamento foliar (4 a 48 h) no desenvolvimento da mancha-alvo em folhas de acerola. As temperaturas ótimas, estimadas a partir das equações, para o crescimento micelial e a germinação de esporos foram de 30 e 29oC, respectivamente. O regime de luz não afetou o crescimento micelial e a germinação dos esporos, entretanto, luz contínua favoreceu a esporulação, e a ausência de luz durante a produção dos esporos diminuiu sua viabilidade. Houve um incremento na área das lesões da mancha-alvo em folhas de acerola conforme a temperatura aumentou até 30oC. Foram necessárias 12 h de molhamento foliar para que a infecção e as lesões ocorressem.

Keywords

Agriculture (General), germinação de esporos, growth mycelial, spores germination, S1-972, crescimento micelial, doença foliar, epidemiology, epidemiologia, Malpighia emarginata, leaf disease

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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gold