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Impacts of a Commercially Available Horticultural Oil Biopesticide (EF-400) on the Tomato- Phytophthora infestans Pathosystem.
- Source :
-
Plant disease [Plant Dis] 2024 Jun; Vol. 108 (6), pp. 1533-1543. Date of Electronic Publication: 2024 May 16. - Publication Year :
- 2024
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Abstract
- Biopesticide fungicides are naturally derived compounds that offer protection from plant diseases through various modes of action, including antimicrobial activity and upregulation of defense responses in host plants. These plant protectants provide a sustainable and safe alternative to conventional pesticides in integrated disease management programs and are especially salient in the management of high-risk and economically important diseases such as late blight of tomato and potato, for which host resistance options are limited. In this study, a commercially available biopesticide, EF400 comprised of clove (8.2%), rosemary (8.1%), and peppermint oils (6.7%) (Anjon AG, Corcoran, CA), was investigated for its effects on the Phytophthora infestans -tomato pathosystem. Specifically, we evaluated the impact of EF400 on P. infestans growth in culture, disease symptoms in planta, and activation of host defenses through monitoring transcript accumulation of defense-related genes. The application timing and use rate of EF400 were further investigated for managing tomato late blight. EF400 delayed the onset of tomato late blight symptoms, although not as effectively as the copper hydroxide fungicide Champ WG (Nufarm Americas Inc., Alsip, IL). Pathogen mycelial growth and sporangial quantity on late blight-susceptible tomato leaves were significantly reduced with EF400. The biopesticide also had an enhancing or suppressing effect on the transcript accumulation of three defense-related genes: Pin2 , PR1a , and PR1b. Our work in exploring a commercially available horticultural oil biopesticide meaningfully contributed to the essential knowledge base for optimizing recommendations for the management of tomato late blight.<br />Competing Interests: The author(s) declare no conflict of interest.
- Subjects :
- Fungicides, Industrial pharmacology
Biological Control Agents pharmacology
Mentha piperita chemistry
Host-Pathogen Interactions drug effects
Solanum lycopersicum microbiology
Phytophthora infestans drug effects
Plant Diseases microbiology
Plant Diseases prevention & control
Plant Oils pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 0191-2917
- Volume :
- 108
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Plant disease
- Publication Type :
- Academic Journal
- Accession number :
- 38105459
- Full Text :
- https://doi.org/10.1094/PDIS-12-22-2968-RE