Efficacy of Essential Oils on the Conidial Germination, Growth of Colletotrichum gloeosporioides (Penz.) Penz. and Sacc and Control of Postharvest Diseases in Papaya (Carica papaya L.)

2008 ◽  
Vol 7 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Laura Leticia Barrera-Ne ◽  
Silvia Bautista-B ◽  
Hilda Elizabeth Flores-Moc ◽  
Abel Rojas Estudillo
Keyword(s):  
Essential Oils ◽  
Carica Papaya ◽  
Colletotrichum Gloeosporioides ◽  
Conidial Germination ◽  
Postharvest Diseases ◽  
And Control

Baseline Sensitivity of Alternaria alternata and A. arborescens to Natamycin and Control of Alternaria Rot on Stored Mandarin Fruit

Plant Disease ◽  
2021 ◽  
Author(s):  
Fei Wang ◽  
Seiya Saito ◽  
Themis Michailides ◽  
Chang-Lin Xiao
Keyword(s):  
Alternaria Alternata ◽  
Mycelial Growth ◽  
Disease Incidence ◽  
Conidial Germination ◽  
High Rate ◽  
Postharvest Diseases ◽  
Baseline Sensitivity ◽  
Germination Assay ◽  
Growth Assay ◽  
And Control

Alternaria rot caused by Alternaria alternata and A. arborescens is one of the major postharvest diseases on mandarin fruit in California. In this study, natamycin, a newly registered biofungicide, was evaluated for its potential as a postharvest treatment to control Alternaria rot on mandarin fruit. The baseline sensitivities of A. alternata and A. arborescens to natamycin were determined. EC50 values of natamycin for 70 A. alternata isolates ranged from 0.694 to 1.275 µg/ml (mean = 0.921 µg/ml) in a conidial germination assay, and from 2.001 to 3.788 µg/ml (mean = 2.797 µg/ml) for 40 A. alternata isolates in a mycelial growth assay. EC50 values of natamycin for 30 A. arborescens isolates ranged from 0.698 to 1.203 µg/ml (mean = 0.923 µg/ml) in a conidial germination assay, and from 2.035 to 3.368 µg/ml (mean = 2.658 µg/ml) for 20 A. arborescens isolates in a mycelial growth assay. Control tests on detached mandarin fruit showed that natamycin at both low (460 µg/ml) and high recommended rates (920 µg/ml) significantly reduced disease incidence and severity on mandarin fruit inoculated with Alternaria isolates, regardless of species. High rate of natamycin significantly reduced disease incidence and severity compared to the non-treated control even when natamycin treatment was delayed for 6, 12, and 18 hours after inoculation. Our results suggested that natamycin can be an effective postharvest fungicide for control of Alternaria rot on mandarin fruit.

Essential oils to control postharvest diseases of apples and peaches: elucidation of the mechanism of action

2021 ◽  
pp. 35-42
Author(s):  
D. Spadaro ◽  
H. Banani ◽  
K. Santoro ◽  
A. Garibaldi ◽  
M.L. Gullino
Keyword(s):  
Essential Oils ◽  
Mechanism Of Action ◽  
Postharvest Diseases

scholarly journals Application of Volatile Antifungal Plant Essential Oils for Controlling Pepper Fruit Anthracnose by Colletotrichum gloeosporioides

2015 ◽  
Vol 31 (3) ◽  
pp. 269-277 ◽  
Author(s):  
Jeum Kyu Hong ◽  
Hye Ji Yang ◽  
Heesoo Jung ◽  
Dong June Yoon ◽  
Mee Kyung Sang ◽  
...  
Keyword(s):  
Essential Oils ◽  
Colletotrichum Gloeosporioides ◽  
Plant Essential Oils ◽  
Pepper Fruit

scholarly journals Assessment of the efficiency of essential oils in the preservation of postharvest papaya in an antimicrobial packaging system

2012 ◽  
Vol 15 (4) ◽  
pp. 333-342 ◽  
Author(s):  
Paula Judith Perez Espitia ◽  
Nilda de Fátima Ferreira Soares ◽  
Laura Costa Moreira Botti ◽  
Nathália Ramos de Melo ◽  
Olinto Liparini Pereira ◽  
...  
Keyword(s):  
Essential Oils ◽  
Physicochemical Parameters ◽  
Phytopathogenic Fungi ◽  
Soluble Solids ◽  
Postharvest Diseases ◽  
Packaging System ◽  
Antimicrobial Packaging ◽  
Post Harvest ◽  
Lemon Grass

Rot and damage caused by post-harvest phytopathogenic fungi affect fruit quality. Essential oils (EO) are considered as an alternative to fungicides. Postharvest diseases of fruits may also be controlled by the bagging approach and the use of antimicrobial packaging. Based on the beneficial properties of EO and the concepts of bagging and antimicrobial packaging, this study aimed to develop sachets containing EO to be used as part of an antimicrobial packaging system. The activities of oregano, cinnamon and lemon grass EO were evaluated testing the sachets in vitro against the phytopathogenic fungi Alternaria alternata, Fusarium semitectum, Lasiodiplodia theobromae and Rhizopus stolonifer. The effects of the sachets on the microbiological and physicochemical parameters of post-harvest papaya were also evaluated. Both pure and sachet-incorporated EO showed antifungal activity in vitro against all tested fungi. For papaya, sachets containing cinnamon, oregano and lemon grass showed a significant reduction in the growth of mesophilic aerobic bacteria, yeasts and mould, with the cinnamon sachet causing the greatest reduction in microorganisms at the end of the storage time. Physicochemical parameters of papaya, such as weight loss, colour, firmness, total soluble solids/titratable acidity ratio and pH were not significantly altered by the presence of EO sachets, thus not affecting the natural ripening process of the papaya.

scholarly journals The insecticidal potential of Foeniculum vulgareMill., Pimpinella anisum L. and Caryophillus aromaticus L. to control aphid on kale plants

2015 ◽  
Vol 17 (4) ◽  
pp. 585-591 ◽  
Author(s):  
P. S. R. LUCCA ◽  
L. H. P. NÓBREGA ◽  
L. F. A. ALVES ◽  
C. T. A. CRUZ-SILVA ◽  
F. P. PACHECO
Keyword(s):  
Essential Oils ◽  
Brassica Oleracea ◽  
Pest Control ◽  
Distilled Water ◽  
Viable Option ◽  
Foeniculum Vulgare ◽  
Pimpinella Anisum ◽  
Natural Substances ◽  
And Control ◽  
Fennel Oil

ABSTRACTThe use of natural substances for pest control in agriculture is, economically, a viable option and has benefits for both the humanbeing and the environment, due to its low persistence and toxicity. Thus, this trial aimed on determining the insecticidal potential of the extracts and essential oils of fennel (Foeniculum vulgare Mill.), anise (Pimpinella anisum L.) and clove (Caryophillus aromaticus L.) to control Brevicoryne brassicae L. in kale (Brassica oleracea var. acephala DC.). The treatments were: fennel, anise, cloves extracts at 10%; fennel, anise, cloves oils at 1% and control with distilled water. The mortality tests were carried out with aphids in laboratory, with three replications, after 1, 12, 24, 48 and 72 hours. During laboratory trials , it was found out that fennel oil at 1% showed the best rate of mortality on aphid nymphs (70% at 72 h), followed by clove extract at 10% with 37% mortality. Tests in pots were only carried out only with cloves extracts at 10% and fennel oil at 1% treatment, in which such efficiency was alsoindicated on aphid nymphs.

scholarly journals Doenças fúngicas pós-colheita em mamões e laranjas comercializados na Central de Abastecimento do Recife

2003 ◽  
Vol 28 (5) ◽  
pp. 528-533 ◽  
Author(s):  
Suzana A. F. Dantas ◽  
Sônia M. A. Oliveira ◽  
Sami J. Michereff ◽  
Luciana C. Nascimento ◽  
Luciana M. S. Gurgel ◽  
...  
Keyword(s):  
Carica Papaya ◽  
Colletotrichum Gloeosporioides ◽  
Lasiodiplodia Theobromae ◽  
Citrus Spp

Doenças fúngicas pós-colheita constituem uma das principais causas de perdas durante a fase de comercialização de frutos tropicais. Frutos de mamão (Carica papaya) e laranja (Citrus spp.) foram analisados em relação à incidência de doenças fúngicas e freqüência das espécies patogênicas durante seis meses, na Central de Abastecimento de Recife, Estado de Pernambuco. As amostragens foram realizadas mensalmente, sendo avaliados 40 frutos de cada espécie, em cinco pontos de comercialização, totalizando 200 frutos/amostragem/espécie. Ocorreu uma grande diversidade de doenças em frutos de mamão, onde as incidências variaram entre 39,71% e 0,07%, com maior nível para a podridão peduncular. Em frutos de laranja a incidência de doenças variou entre 11,85% e 0,62%, para podridão peduncular por Lasiodiplodia spp. e antracnose, respectivamente. Os patógenos que apresentaram maiores freqüências foram Colletotrichum gloeosporioides (44,95%) em mamão e Lasiodiplodia theobromae (11,85%) em laranja. A diversidade de doenças constatada neste estudo sugere a necessidade do emprego de medidas de controle mais efetivas durante as fases de produção e pós-colheita de frutos de mamão e laranja, visando propiciar redução das perdas.

Foliar application effects of salicylic acid and jasmonic acid on the essential oil composition of Salvia officinalis

2018 ◽  
Vol 43 (4) ◽  
pp. 417-424 ◽  
Author(s):  
Mehrab Yadegari
Keyword(s):  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Essential Oils ◽  
Foliar Application ◽  
Essential Oil Composition ◽  
Research Field ◽  
Salvia Officinalis ◽  
Oil Composition ◽  
Average Temperature ◽  
And Control

Abstract Aim In this research, the effects of two elicitors [jasmonic acid (JA) and salicylic acid (SA)] on the accumulation of essential oils in the seed cultures of Sage (Salvia officinalis L.) were studied. Materials and methods This research was conducted at the research field of Islamic Azad University, Shahrekord branch located at 50°56/E longitude, 32°18/N latitude during 2015 and 2016. The study area was classified as semi cold with an average temperature of 11.5°C and semi-arid with 329.9 mm of average rainfall. Seeds of sage were planted under field conditions. The following treatments were applied after the plants had four leaves: water, acetone, JA (0.1051, 0.2102, 0.4204, 0.8408 g/L), SA (0.0138, 0.138, 0.276, 0.552 g/L) and control. Results Twenty-seven essential oils were obtained and the most notable were: α-pinene, limonene, β-pinene, camphor, thymol, camphene, thujone-trans, thujone-cis, 1,8-cineole, borneol, borneol acetate, carvacrol, α-humulene, caryophyllene. JA was more effective in stimulating the accumulation of α-pinene, limonene, β-pinene, camphor, thymol, camphene, thujone-trans, thujone-cis, 1,8-cineole, borneol, borneol acetate, carvacrol, α-humulene and caryophyllene. Conclusion JA and SA had increasing effects on essential oils. The best treatments were found to be JA 0.1051 g/L, JA 0.2102 g/L and SA 0.138 g/L.

scholarly journals Chemical composition and control of Sclerotium rolfsii Sacc by essential oils

2020 ◽  
Vol 14 (4) ◽  
pp. 119-128
Author(s):  
Rosa Beserra Santos Ananda ◽  
Laranjeira Delson ◽  
Raquel Carvalho Dias Larisse ◽  
Da Silva Sousa Edymilais ◽  
Dário Silva De Melo Christian ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Sclerotium Rolfsii ◽  
And Control
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