Antifungal activity and bio-stimulating effect generated by two botanical extracts in Alpinia purpurata and Heliconia wagneriana cultivation

Fusarium sp. and Capnodium sp. are phytopathogen fungi causing scab and sooty mold in Alpinia purpurata and Heliconia wagneriana , economically important tropical flowers for farmers in the area of Concordia, Ecuador. They constitute a threat to their high occurrence on stems, foliage, and flowers,...

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Bibliographic Details
Published in:Organic agriculture 2018-12, Vol.8 (4), p.325-333
Main Authors: Cárdenas, Carlos Delfín, Tumbaco, Mayra, Pozo-Rivera, Wilmer E., Morejón, Mariol, Rojas, Marcia, Gooty, Jaffer Mohiddin, Cuaycal, Alexandra
Format: Article
Language:English
Subjects:
Agriculture
Agrochemicals
Alcohols
Alpinia purpurata
Antifungal activity
Biological activity
Biomedical and Life Sciences
Capnodium
Cultivation
Economic importance
Environment
Environmental factors
Flowers
Foliage
Fungi
Fungicides
Fusarium
Heliconia
Life Sciences
Organic chemistry
Plant extracts
Plant Sciences
Scab
Sooty mold
Stems
Sustainable Development
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Summary:Fusarium sp. and Capnodium sp. are phytopathogen fungi causing scab and sooty mold in Alpinia purpurata and Heliconia wagneriana , economically important tropical flowers for farmers in the area of Concordia, Ecuador. They constitute a threat to their high occurrence on stems, foliage, and flowers, mostly influenced by environmental factors. In the present study, plant extracts from Ocotea quixos (Lam.) and Piper carpunya (Ruiz & Pav.) were used as an alternative to agrochemicals. Extracts were obtained by two methods, and serial dilutions were tested on each isolated’s phytopathogen in vivo. Results showed that macerated extracts in cane alcohol and the herbal distillates from P. carpunya and O. quixos present good preventive and regulator level on Fusarium sp. and Capnodium sp. at the laboratory level. On this basis, these extracts were implemented in the field in two doses with chemical and absolute controls. An arbitrary visual scale was put in a place to assess the level of control on phytopathogens. This scale ranged from 1 to 4 and determined visual damage caused in the stems, leaves, and flowers of A. purpurata and H. wagneriana . Six applications were done, once a week, in two cuts in each flower. The control effect or severity of the infection was evaluated every 15 days. The results showed an inhibitory biological activity of extracts against Fusarium sp. and Capnodium sp. and a bio-stimulating effect on flower spikes.
ISSN:1879-4238
1879-4246
DOI:10.1007/s13165-017-0194-6