Control of Phytophthora brown rot of lemons by pre- and postharvest applications of potassium phosphite

Ramallo, Ana Carolina; Cerioni, Luciana; Olmedo, Gabriela María; Volentini, Sabrina Inès; Ramallo, J. C.; Rapisarda, Viviana Andrea

doi:10.1007/s10658-019-01717-y

Cited by 17 publications

(18 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Phytophthora citrophthora isolate (Ph009) used in this work was obtained from naturally decayed lemons in Tucumán, Argentina, according to Ramallo et al 13 . Phytophthora citrophthora was maintained as mycelium in water agar (WA) disks immersed in sterile distilled water at 18 °C 19…”

Section: Methodsmentioning

confidence: 99%

“…The radial growth of the colony was measured after 7 days at 24 °C. To assess in vitro antimicrobial combination of phosphites and the algae extract in P+An formulation, fractional inhibitory concentration 20 index was calculated as reported by Berenbaum, 21 considering phosphite inhibitory concentrations reported by our group 13 . A fractional inhibitory index (FIC) index lower or higher than 1 indicates synergy or antagonism, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Sporangia production and zoospore germination were evaluated according to previously reported protocols, 13 with slight modifications. Briefly, to test the effect on sporangia production, P. citrophthora mycelium plugs obtained from V8 agar plates were incubated for 24 h at 24 °C in V8 broth in the dark; the grown mycelium was washed three times with sterile water to remove the culture medium, and tested compounds were added as aqueous solutions at different concentrations.…”

Section: Methodsmentioning

confidence: 99%

“…Phosphite salts have been reported to control Phytophthora diseases in citrus 3,13,14 and to improve crop yield and fruit quality 15 . They are also exempt from soil disposal problems due to their neutral pH and lack of sodium 16 .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Inhibition of the lemon brown rot causal agent Phytophthora citrophthora by low‐toxicity compounds

et al. 2020

View full text Add to dashboard Cite

BACKGROUND Phytophthora spp., soil‐borne oomycetes, cause brown rot (BR) on postharvest lemons. The management of this disease is based on cultural practices and chemical control using inorganic salts of limited efficacy. In the search for new alternatives, the aim of this work was to evaluate the effect of low‐toxicity compounds to inhibit the growth of P. citrophthora and to control BR disease on lemons. Sodium bicarbonate, potassium sorbate, polyhexamethylene guanidine, Ascophyllum nodosum extract and a formulation containing phosphite salts plus A. nodosum (P+An) were evaluated. RESULTS All tested products inhibited mycelial growth, sporangia formation and zoospore germination of P. citrophthora in vitro. In postharvest applications on artificially inoculated lemons, only P+An exhibited a BR curative effect, with incidence reduction of around 60%. When this formulation was applied in field treatments, BR incidence was reduced by 40% on lemons harvested and inoculated up to 30 days post application. CONCLUSION Our results demonstrate the in vitro direct anti‐oomycete effect of low‐toxicity compounds and the in vivo efficacy of P+An formulation to control BR, encouraging the incorporation of the latter in the management of citrus BR. © 2020 Society of Chemical Industry

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inhibition of the lemon brown rot causal agent Phytophthora citrophthora by low‐toxicity compounds

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Os fosfitos (principalmente fosfito de potássio) são compostos que possuem comprovada ação antifúngica contra Phytophthora spp. (12,19), e efeito aditivo quando utilizados em conjunto com fungicidas em menor concentração do que o recomendado (2). Portanto, novos testes poderão ser realizados com a comparação do efeito destas moléculas isoladas e em associação.…”

Section: Caracterização Química Quantitativa E Qualitativa Dos óLeos unclassified

Bioatividade de óleos essenciais e extratos vegetais no controle de doenças causadas por Phytophthora nicotianae em solanáceas

et al. 2020

View full text Add to dashboard Cite

RESUMO Óleos essenciais (EO) e extratos brutos aquosos (EBA) de Syzygium aromaticum e Cymbopogon nardus, e seus principais componentes químicos foram investigados para controle in vitro e in vivo de doenças causadas por Phytophthora nicotianae em tomateiro (Lycopersicon esculentum) e berinjela (Solanum melongena). Experimentos in vitro foram conduzidos pelo método de diluição em ágar com diferentes concentrações de óleos essenciais (OE’s) (0,1; 0,5; 1,0 ?L/mL) e extratos aquosos brutos (EBA’s) (1,0; 10,0 20,0%) para avaliar o potencial inibitório sobre o crescimento micelial e germinação de zoósporos. Com as porcentagens de inibição e concentrações inibitórias mínimas encontradas, realizou-se testes em frutos e plântulas sob ambiente controlado. As variáveis avaliadas foram o diâmetro médio das lesões formadas na superfície dos frutos e a incidência e morte de plântulas ao longo de seis e 15 dias de avaliação, respectivamente. Os produtos que mais inibiram o crescimento micelial e a germinação de zoósporos foram obtidos de S. aromaticum, nas concentrações de 0,5 ?L/mL e 10% de OE e EBA, respectivamente. Os tratamentos que mais retardaram a progressão da doença em frutos e plântulas, em comparação com o controle, foram o OE e EBA de C. nardus a 1,0 ?L/mL e 20%, respectivamente. Portanto, os produtos obtidos de S. aromaticum e C. nardus, têm potencial para reduzir o ataque deste patógeno em tomate e berinjela.

show abstract

Management of Phytophthora palmivora disease in Citrus reticulata with chemical fungicides

Minh

Thu

Nam³

et al. 2020

J Gen Plant Pathol

View full text Add to dashboard Cite

Control of Phytophthora brown rot of lemons by pre- and postharvest applications of potassium phosphite

Cited by 17 publications

References 17 publications

Inhibition of the lemon brown rot causal agent Phytophthora citrophthora by low‐toxicity compounds

Inhibition of the lemon brown rot causal agent Phytophthora citrophthora by low‐toxicity compounds

Bioatividade de óleos essenciais e extratos vegetais no controle de doenças causadas por Phytophthora nicotianae em solanáceas

Management of Phytophthora palmivora disease in Citrus reticulata with chemical fungicides

Contact Info

Product

Resources

About