A Systemic Fungicide (Tetraconazole) Against the Olive Leaf Spot, Spilocaea Oleagina, in Italy

Belfiore, T.; Perri, Enzo; Scalercio, S.; Iannotta, N.; Tocci, C.

doi:10.17660/actahortic.2014.1057.22

Cited by 4 publications

(10 citation statements)

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“…In other field studies, the use of dodine and copper oxychloride showed similar effects (Iannotta et al, 2002;Belfiore et al, 2014;Adawi et al, 2022). The differences in the results obtained in the present study with respect to those of Iannotta et al (2002) and Belfiore et al (2014) may be due to the heavy but still mainly asymptomatic attack of the trees in our study. Indeed, at the beginning of the experiment the attack was at an initial stage of disease development (only 15% of the leaves were symptomatic).…”

Section: Discussioncontrasting

confidence: 57%

“…Dodine is also used to control the fungus and, due to its cytotropic penetration, it has a curative action on diseased leaves (Iannotta et al, 2002;Obanor et al, 2008). However, in a greenhouse trial carried out in New Zealand to evaluate its effectiveness, dodine was not more effective than copper sulphate (Obanor et al, 2008) and similar results were also obtained in Italy (Iannotta et al, 2002;Belfiore et al, 2014).…”

Section: Introductionmentioning

confidence: 94%

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Dodine an effective alternative to copper for controlling Venturia oleaginea, the causal agent of pea-cock eye disease, in highly infected olive trees

Almadi,

Frioni,

Farinelli

et al. 2024

Front. Plant Sci.

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A trial was carried out in central Italy in an olive orchard of cultivar Moraiolo, highly infected by Venturia oleaginea. The aim of the investigation was to evaluate the effects of autumn and spring applications of copper oxychloride or dodine to control the disease. Non treated trees were used as the control. The effects of the fungal attacks on leaves and inflorescence development confirmed the high susceptibility of the cultivar Moraiolo to the disease. The results show that in trees heavily infected, but with most of the infected leaves at the early stage of the disease (asymptomatic phase), treatments with dodine had a curative effect, with consequent reduction in the appearance of symptomatic leaves and defoliation with respect to the control or copper-treated trees. The use of dodine against the autumnal attacks of V. oleaginea allowed most of the old leaves to be maintained until the new ones had formed, which is important for the growth processes during the early part of the growing season. Overall, the results indicate that to efficiently control the pathogen using copper compounds, treatments must start soon after the beginning of the attack and be repeated in order to maintain the infection at a low level. Dodine can be efficiently used if there is a great increase in infected leaves. The use of dodine to solve particular situations and not for normal repeated use is regulated by the fact that in some countries, Italy included, protocols for integrated pest management allow only one dodine treatment/year.

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Section: Discussioncontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 94%

Dodine an effective alternative to copper for controlling Venturia oleaginea, the causal agent of pea-cock eye disease, in highly infected olive trees

Almadi,

Frioni,

Farinelli

et al. 2024

Front. Plant Sci.

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“…Copper compounds, such as bordeaux mixture, copper oxychloride, copper hydroxide, copper oxide and tribasic copper sulphate, have a double action: prevention of the pathogen attacks on healthy leaves and reduction of the inoculum for new infections (Iannotta et al, 2002;Obanor et al, 2008a;Belfiore et al, 2014). In fact, copper can penetrate leaves through wounds caused by erupting conidia during the evasion and being copper phytotoxic, causes the premature drop of leaves (Graniti, 1993).…”

Section: Chemical Controlmentioning

confidence: 99%

“…Chemical control of OLS disease is mainly carried out with contact copper compounds and to a lesser extend with cytotropic-translaminar (dodine and strobilurins) and systemic (triazoles) fungicides ( Obanor et al., 2005 ; Roca et al., 2007 ). Copper compounds, such as bordeaux mixture, copper oxychloride, copper hydroxide, copper oxide and tribasic copper sulphate, have a double action: prevention of the pathogen attacks on healthy leaves and reduction of the inoculum for new infections ( Iannotta et al., 2002 ; Obanor et al., 2008a ; Belfiore et al., 2014 ). In fact, copper can penetrate leaves through wounds caused by erupting conidia during the evasion and being copper phytotoxic, causes the premature drop of leaves ( Graniti, 1993 ).…”

Section: Controlmentioning

confidence: 99%

“…Among the curative fungicides, dodine has been reported to be as effective as copper compounds ( Iannotta et al., 2002 ; Belfiore et al., 2014 ; Lahoz et al., 2014 ), or better when used in highly infected trees, as a result of its curative effect. In a recent study conducted on olive trees with a high latent infection incidence, dodine was more effective than copper in reducing new infections, the appearance of symptomatic leaves and the defoliation (Almadi et al., unpublished).…”

Section: Controlmentioning

confidence: 99%

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Olive leaf spot caused by Venturia oleaginea: An updated review

et al. 2023

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Olive leaf spot (OLS) caused by Venturia oleaginea is widespread in all olive-growing areas and continents, where can cause severe yield losses. The disease is often underestimated for the difficulty to reveal early leaf symptoms and for the pathogen-induced phylloptosis, which creates the illusion of healthy and restored plants. The present review provide updated information on taxonomy, pathogen life style and cycle, epidemiology, diagnosis, and control. Application of copper-based fungicides is the main method to control OLS. However, the regulation 2009/1107 of the European Commission include these fungicides in the list of substances candidates for substitution. It is therefore urgent to find alternative control strategies especially for organic agriculture. Among new approaches/strategies for controlling OLS, promising results have been obtained using nanotechnology, endophytic microbes, and biostimulants.

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Effectiveness of Low Copper-Containing Chemicals against Olive Leaf Spot Disease Caused by Venturia oleaginea

Adawi

Jarrar²,

Almadi

et al. 2022

Agriculture

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The high level of copper (Cu) accumulation in the soil, the risk of surface water contamination, and the potential public health problems due to Cu entering the food chain have raised concerns on the use of Cu compounds in agriculture, including olive growing. As a consequence, there is worldwide regulatory pressure on agricultural systems to limit the use of Cu compounds. Hence, a field trial was carried out to evaluate the effectiveness of low copper containing chemicals to control olive leaf spot (OLS) disease caused by Venturia oleaginea. The trial was conducted in 2021 in an olive (cv. Nabali Baladi) grove in Palestine. Copper complexed with lignosulphonate and gluconate (Disper Cu Max®) and the self-defense inducer Disper Broton GS® were evaluated and compared to dodine and the traditionally and frequently used copper hydroxide. In addition, untreated trees were used as the control. Treatments were made in March, July, and August. In March 2021, leaves grown in 2020 were present and 100% infected. V. oleaginea infections caused defoliation in untreated and treated olive trees with varying degrees of intensity: the Control had the most defoliation, followed by copper hydroxide and Disper Cu Max®, whereas dodine and, in particular, Disper Broton GS® had the least. All treatments reduced symptomatic leaves but their efficacy varied significantly: copper hydroxide was the least effective, Disper Cu Max® was intermediate, dodine and, mainly, Disper Broton GS® were the most effective. Overall, the results are promising since Disper Cu Max® and Disper Broton GS® were able to significantly reduce OLS damage and the amount of copper used for treatments.

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A Systemic Fungicide (Tetraconazole) Against the Olive Leaf Spot, Spilocaea Oleagina, in Italy

Cited by 4 publications

References 0 publications

Dodine an effective alternative to copper for controlling Venturia oleaginea, the causal agent of pea-cock eye disease, in highly infected olive trees

Dodine an effective alternative to copper for controlling Venturia oleaginea, the causal agent of pea-cock eye disease, in highly infected olive trees

Olive leaf spot caused by Venturia oleaginea: An updated review

Effectiveness of Low Copper-Containing Chemicals against Olive Leaf Spot Disease Caused by Venturia oleaginea

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