Preliminary selection and evaluation of fungicides and natural compounds to control olive anthracnose caused by Colletotrichum species

Moral, Juan; Agustí-Brisach, Carlos; Agalliu, Gentjian; Oliveira, Rodrígues de; Pérez-Rodríguez, Mario; Roca, L. F.; Romero, J.; Trapero, A.

doi:10.1016/j.cropro.2018.08.033

Cited by 34 publications

(33 citation statements)

References 20 publications

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“…The inhibitory properties of genus Fuerstia to spore germination may be attributed to its glycoalkaloid effect of its toxic fruits at 0.1-0.3% wet mass and its relatively strong antifungal activity (Gurjar et al, 2012). The fungicidal spectrum of Azadirachta indica, which had above average inhibition in this study, has been attributed to Azadiractractrachin, which belongs to C25 terpeniodes (Moral et al, 2018). The preservative nature of some plant extracts has been known for centuries, and there has been renewed interest in the antifungal properties of extracts from aromatic plants (Alves et al, 2000).…”

Section: Conidial Germination Test the Plant Partsmentioning

confidence: 54%

“…Methanolic, chloroform and ethanolic extracts of F. africana, Solanum incanum, Azadirachta Indica, Carisa edulis and Aloe chiliensis that suppressed the growth of C. gloeosporoides in the PDA and other media should be used for antifungal treatments of anthracnose in Baringo and Elgeyo-Marakwet in Kenya to encourage herbal plant controls in management of the fungus. The preservative nature of some plant part extracts have been known for centuries, and there has been a renewed interest in the antimicrobial properties of extracts from aromatic plants (Moral et al, 2018). The active compounds of the respective botanicals used in this study should be isolated, tested and formulated into affordable and eco-friendly antifungal agents for pawpaw growing farmers in Kenya.…”

Section: Days To Healingmentioning

confidence: 99%

“…Pawpaw (Carica papaya Caricaceae) is predominantly a smallholder farmer crop in the arid and semi-arid areas of Kenya; whose production is widely hampered by anthracnose disease caused by Colletotrichum gloeosporoides. Fungicides application has been the most effective method of controlling anthracnose (Ishii et al, 2016;Cao et al, 2017;Moral et al, 2018). However, the practice is associated with ill health, caused by fungicide residues in food value chains.…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of plant extracts and extracting agents against Colletotrichum gloeosporoides of pawpaw fruits

Kugui¹,

Mwamburi²,

Kiprop³

2020

Afr. Crop Sci. J.

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Pawpaw (Carica papaya L.) is a fruit crop of economic importance in Kenya, where small scale farmers are the major producers. One factor limiting pawpaw production is anthracnose disease caused by Colletotrichum gloeosporoides, whose management on farm still remains a major challenge. The objective of this study was to determine the efficacy of plant extracts and extracting agents for controlling anthracnose disease on pawpaw fruits. In vitro spore germination and in-vivo tests were done using extracts from five plants; Aloe chiliensis, Azadiracta indica, Carissa edulis, Fuerstia africana and Solanum incanum; and extracting agents methanol, chloroform and ethanol against the fungus. A logistic regression model was used to estimate the botanicals’ dose response treatment ranges. The efficacy of the crude extracts was greatest when methanol was used for extraction. The highest inhibition was recorded in pawpaw fruits treated with leaf extracts of F. africana. There were significant differences in effects among treatments by methanolic extracts of the five plants on conidial spore germination percentage. Aloe chilensis (Aloe) showed a higher spore germination of 35.7%; while Azadirachta indica (Neem) resulted in the lowest spore germination of 1.2%. There were significant differences in days to healing of C. papaya fruits infected with anthracnose. Pawpaw infected fruits healed fastest (3.5 days) when treated with the methanolic leaf extracts of F. africana; while A. chiliensis ethanolic leaf extracts resulted in the longest healing time of over 7 days. Although these botanical fungicides present high potentials or controlling anthracnose pathogens of pawpaw fruits, their suitability for application within the socio-economic framework of Kenyan small-scale producers still remains a matter for further investigation.

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Section: Conidial Germination Test the Plant Partsmentioning

confidence: 54%

Section: Days To Healingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficacy of plant extracts and extracting agents against Colletotrichum gloeosporoides of pawpaw fruits

Kugui¹,

Mwamburi²,

Kiprop³

2020

Afr. Crop Sci. J.

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“…Difenoconazole and folpet also showed good inhibitory effects on mycelial growth, but copper-based compounds were the least effective, with high EC 50 values. In comparison to protective fungicides (inorganic copper-based and organic fungicides), systemic fungicides provide a higher efficacy in inhibiting mycelial growth [44][45][46]. However, these differences between systemic and protective fungicides should not be directly extrapolated to field conditions because protective fungicides have a marked effect on conidial germination [47].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Fungicides and Management Strategies against Cercospora Leaf Spot of Olive Caused by Pseudocercospora cladosporioides

et al. 2020

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Cercospora leaf spot of olive (CLSO), caused by Pseudocercospora cladosporioides, is one of the most important foliar diseases of olives worldwide. This study aimed to evaluate the effect of a wide range of fungicides on mycelial growth and conidial germination of P. cladosporioides in vitro, and to evaluate the effect of several fungicides, application timings and management strategies (conservative and risky) to control CLSO under field conditions. Of the studied fungicides, strobilurin compounds and benomyl were the most effective active ingredients, followed by folpet, captan and maneb, in inhibiting mycelial growth and conidial germination. The pyraclostrobin + boscalid treatment was effective under field conditions, even without the application of supplementary copper. Treatments conducted in October or March were more effective than those conducted in May. Management strategies based on the author's experience reduced copper applications up to 32.0% and 50.0% (conservative and risky strategy, respectively) in comparison to the reduction with the traditional strategy, without increasing CLSO incidence. This work provides useful information about effective formulations against CLSO and a reduction in unnecessary fungicide applications in an effort to implement IPM in olive orchards under Mediterranean conditions.

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“…In both Granon and Ancla orchards, different copper-based fungicides were used within a normal annual treatment schedule (two to three treatments per year) during spring and fall-winter to control different aerial diseases such as Venturia oleaginea and Pseudocercospora cladosporioides (Moral et al, 2018). These compounds have no activity against vascular diseases such as Verticillium wilt (Fodale and Mule, 1999).…”

Section: Ancla Orchardmentioning

confidence: 99%

Effect of Cultivar Resistance and Soil Management on Spatial–Temporal Development of Verticillium Wilt of Olive: A Long-Term Study

Ostos

García-López

Porras³

et al. 2020

Front. Plant Sci.

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Verticillium wilt, caused by Verticillium dahliae, challenges olive cultivation and an Integrated Disease Management (IDM) approach is the best-suited tool to combat it. Since 1998, an IDM strategy in an orchard (called Granon, Spain) of the susceptible cv. Picual was conducted by increasing planting density with moderately resistant cv. Frantoio, chemical weed control, and replanting of dead olives with cv. Frantoio following soil solarization. The Verticillium wilt epidemic in Granon orchard was compared to the epidemic in a non-IDM orchard (called Ancla, Spain) with plowed soil and dead Picual olives replanted with the same cultivar. Field evaluations (2012-2013) showed an incidence and severity of the disease as Picual-Ancla > Picual-Granon > Frantoio-Granon. The spatiotemporal dynamics of the Verticillium epidemics from 1998 to 2010 were monitored with digital images using SIG. The annual tree mortalities were 5.6% for Picual olives in Ancla orchard, and 3.1 and 0.7% for Picual and Frantoio olives in Granon orchard, respectively. There was a negative relationship between the mortality of olive trees (%) by the pathogen and the height (m) above sea level. The annual mortality of cv. Picual olives was positively correlated with spring rainfalls. The Index of Dispersion and beta-binomial distribution showed aggregation of Verticillium-dead olives. In conclusion, this IDM strategy considerably reduced the disease in comparison with traditional agronomic practices.

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Preliminary selection and evaluation of fungicides and natural compounds to control olive anthracnose caused by Colletotrichum species

Cited by 34 publications

References 20 publications

Efficacy of plant extracts and extracting agents against Colletotrichum gloeosporoides of pawpaw fruits

Efficacy of plant extracts and extracting agents against Colletotrichum gloeosporoides of pawpaw fruits

Evaluation of Fungicides and Management Strategies against Cercospora Leaf Spot of Olive Caused by Pseudocercospora cladosporioides

Effect of Cultivar Resistance and Soil Management on Spatial–Temporal Development of Verticillium Wilt of Olive: A Long-Term Study

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