Phosphorus, nitrogen and potassium nutrition on Calonectria leaf blight in eucalypt plants

Zarpelon, Talyta G.; Silva, André Costa da; Santos, André Ferreira; Freitas, Camila da Silva; Coutinho, Marcelo M.; Barros, Nairam Félix de; Freitas, Rodrigo G.; Alfenas, Acelino C.

doi:10.1111/efp.12561

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…Our study showed a strong correlation between disease severity percent on root and herb fresh weight assessed on main contents in leaves of moringa plants during the two experiments. These results are in line with those reported by Huber and Haneklaus (2007); Scurich (2012); Gupta et al (2017) and Zarpelon et al (2019). Mineral nutrients are the components of plants and regulate metabolic activity associated with resistance of a plant and virulence of a pathogen.…”

Section: Discussionsupporting

confidence: 92%

Performance of Soil Type, Cyanobacterium Spirulina platensis and Biofertilizers on Controlling Damping-off, Root Rot and Wilt Diseases of Moringa (Moringa oleifera Lam.) in Egypt

Imara

Zaky

Ghebrial

2021

Egyptian Journal of Phytopathology

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The present study was carried out under pot experiments during 2019 and 2020. Four fungi were isolated from naturally infected moringa roots. Sclerotium rolfsii was the most frequently isolated fungus, followed by Fusarium oxysporum, while Fusarium solani and Rhizoctonia solani were the least frequent ones. S. rolfsii followed by F. oxysporum were the most virulent isolated fungi that caused the highest percentages of pre-and post-emergence damping-off, root rot and/or wilt. While, F. solani showed the lowest effect in this respect. Sandy soil followed by mixture of sandy + clay soil (2:1 w/w) were the best for decreasing pre-and postemergence damping-off as well as root rot and/or wilt diseases and increasing percent of survived plants compared to clay soil. Cyanobacterium, Spirulina platensis and the mixture of biofertilizers, i.e., nitrobein, phosphorein and potasiomag, as well as Topsin-M fungicide were effective to control the tested pathogens. All the tested treatments were capable to cause significant reduction of damping-off, root rot and/or wilt diseases and increase the percent of survived plants when used as soil treatments. Also, they significantly increased herb fresh weight/plant (g) and fresh weight of tuber (g) as well as no. of new plants, herb fresh weight of new plant (g), fresh weight of new tuber (g) and nutrients content in moringa leaves compared with control treatment. The biofertilizers proved to be the most effective treatment in this regard.

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Section: Discussionsupporting

confidence: 92%

Performance of Soil Type, Cyanobacterium Spirulina platensis and Biofertilizers on Controlling Damping-off, Root Rot and Wilt Diseases of Moringa (Moringa oleifera Lam.) in Egypt

Imara

Zaky

Ghebrial

2021

Egyptian Journal of Phytopathology

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Cool Temperatures Favor Growth of Oregon Isolates of Calonectria pseudonaviculata and Increase Severity of Boxwood Blight on Two Buxus Cultivars

et al. 2022

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Controlled environment experiments were conducted to evaluate the effects of temperature on Calonectria pseudonaviculata mycelial growth and effects of temperature and infection period on boxwood blight severity. In experiment 1, 15 Oregon isolates (representing five genotypes) were grown on potato dextrose agar (PDA) and malt extract agar (MEA) at six temperatures from 5 to 30°C. Growth (culture diameter) was measured after 2 weeks. Optimal growth occurred at 25°C on PDA and 20°C on MEA. Isolates of genotype G1 also grew faster than genotype G2, but only on MEA at 25°C. In experiment 2, Buxus cultivars Green Velvet (GV, more susceptible) and Winter Gem (WG, more resistant) were inoculated and incubated in moist chambers for 9 or 24 h at 22°C (infection period), then moved into growth chambers at 15 or 25°C. After 4 weeks, chamber temperatures were switched and plants were incubated for 4 more weeks. Disease severity was evaluated weekly. During the first 4 weeks, disease was generally more severe on GV than WG, on plants with a 24 h versus a 9 h infection period, and on plants incubated at 15°C versus 25°C. However, disease was just as severe on WG as GV when the 24 h infection period was followed by incubation at 15°C. After the temperatures were switched, disease increased only on WG that were cooled from 25 to 15°C. Results show that Oregon isolates of C. pseudonaviculata are capable of growing faster and causing more severe disease at temperatures cooler than those reported previously.

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Calonectria leaf blight of Eucalyptus: A global review

Bose

Banerjee

Pandey

et al. 2022

Annals of Applied Biology

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Calonectria (= Cylindrocladium), an internationally recognised fungal ascomycete genus, causes significant diseases on numerous crops of forestry, horticultural and agricultural interest. Eucalyptus, an economically important multipurpose plantation forestry species, is severely threatened by Calonectria leaf blight (CLB) disease in Brazil, Australia, China, Indonesia, Vietnam and India. The disease causes serious mortality in the nurseries/plantations and yield losses due to defoliation. Since the first report of Calonectria in 1867, efforts have been made for the identification and characterisation of this vastly diverse hypocrealean genus. Currently, the genus Calonectria harbours 131 species grouped within 11 species complexes, and broadly categorised into the Prolate and Sphaero‐Naviculate groups. Globally, 35 Calonectria species distributed in seven species complexes cause CLB of Eucalyptus, out of which 29 belong to the Prolate group and five to the Sphaero‐Naviculate group. Likewise, 28 Calonectria species distributed in eight species complexes have been reported in association with infected Eucalyptus tissues and plantation soil, however, their pathogenicity remains to be determined. Given the importance of CLB of Eucalyptus, this review compiles its global impact, shifts in taxonomy and nomenclature of Calonectria, pathogenesis mechanism, defence response of Eucalyptus upon infection and disease management. This study identifies and provides direction to crucial areas of future research on CLB which is severely impacting Eucalyptus plantations globally.

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Phosphorus, nitrogen and potassium nutrition on Calonectria leaf blight in eucalypt plants

Cited by 3 publications

References 32 publications

Performance of Soil Type, Cyanobacterium Spirulina platensis and Biofertilizers on Controlling Damping-off, Root Rot and Wilt Diseases of Moringa (Moringa oleifera Lam.) in Egypt

Performance of Soil Type, Cyanobacterium Spirulina platensis and Biofertilizers on Controlling Damping-off, Root Rot and Wilt Diseases of Moringa (Moringa oleifera Lam.) in Egypt

Cool Temperatures Favor Growth of Oregon Isolates of Calonectria pseudonaviculata and Increase Severity of Boxwood Blight on Two Buxus Cultivars

Calonectria leaf blight of Eucalyptus: A global review

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