Control of powdery mildew in okra using cultural filtrates of certain bio-agents alone and mixed with penconazole

Derbalah, Aly; Kot, G. A. El; Hamza, Amany

doi:10.1080/03235408.2011.559041

Cited by 12 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of the order Moniliales and family Dematiaceae (Barnett & Hunter, 2006) is registered as an antagonist for Monilinia sp. in peach and nectarine (De Cal et al, 2009), Sclerotinia sclerotiorum in sunflower and dry beans (Huang et al, 2000;Pieckenstain et al, 2001), Monilinia fructicola in plums and apples (Wittig et al, 1997;Falconi & Mendgen, 1994), Erysiphe cichoracearum in lady's fingers (Derbalah et al, 2011), Colletotrichum gloesporioides in guava (Pandey et al, 2007), Rhizoctonia solani in tomato (Lahlali & Hijri, 2010), Macrophomina phaseolina and R. solani in soybean (Hashem, 2004), R. solani and Fusarium sambuciunum in potato (El-Kot, 2008). Also, its efficiency as antagonist to Oomycetes such as Pythium in Vicia faba, Vicia unguiculata, Lupinus termis (Koutb & Ali, 2010), Gossypium hirsutum (Hashem & Ali, 2004), Plasmopora viticola in Vitis vinifera (Kortekamp, 1997), and phytoplasm in Catharanthus roseus (Musetti et al, 2011) has been reported.…”

Section: Introductionmentioning

confidence: 99%

Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp

Sena¹,

Chaibub²,

Cortes³

et al. 2013

Trop. plant pathol.

View full text Add to dashboard Cite

Epicoccum sp. showed in vitro antagonism to the rice pathogens Magnaporthe oryzae, Rhizoctonia solani, Sarocladium oryzae, Monographella albescens and Cochliobolus miyabeanus in dual culture. The colony growth of the rice blast fungus, M. oryzae, was reduced by 42.50%. The lethal doses (LD 50 ) determined based on probit-log dosage response curves at 3 and 6 hours after germination were 393.0 and 326.6 ppm, respectively. The crude extract (600 ppm) reduced appressorial formation by 95.68%. A greenhouse experiment comparing the relative efficiency of conidial suspension and crude extract of Epicoccum sp. in the suppression of leaf blast showed no statistical difference between both application methods. However, the crude extract of Epicoccum sp. (4000 ppm) 48 hours before the application of M. oryzae induced resistance and suppressed leaf blast by 97.6%. Scanning electron microscopy of rice leaves inoculated with crude extract of Epicoccum sp. and challenged with M. oryzae showed appressorial deformation on penetration phase. Peroxidase and β-1,3-glucanase activities increased in plants sprayed with crude extract of Epicoccum sp., 24 hours after the application of the challenger. PAL as well as chitinase activities increased 72 hours after challenge inoculation. Epicoccum sp. was shown to be a potential antagonist and inducer of resistance against M. oryzae.

show abstract

Section: Introductionmentioning

confidence: 99%

Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp

Sena¹,

Chaibub²,

Cortes³

et al. 2013

Trop. plant pathol.

View full text Add to dashboard Cite

show abstract

“…The disease is occurring on cultivated okra (Abelmoschus esclentus L.) in governorates Upper of Egypt as well as other Geographical regions and causing severe losses in yield and pods quality (Derbalah et al, 2011). Powdery mildew disease of okra caused by the air-borne fungus Erysiphe cichoracearum DC.…”

Section: Introductionmentioning

confidence: 99%

“…Biological control based on the antagonism between microorganisms (Andrews, 1992;Cook and Baker, 1983) or inhibitory effect of plant derived agents on the pathogen (Konstantindou-Doltisinis et al, 2006;Rakhonde et al, 2011), is considered an alternative way to prevent or suppress powdery mildew on grown crops. For this propose, many successful attempts had been made to use the antagonists or their culture filtrates for controlling powdery mildew on okra and other crops (Alahakoon et al, 2010;Derbalah et al, 2011;Gilardi et al, 2008;Picton and Hummer, 2003;Romero et al, 2007;Scheurell and Mahaffee, 2000;Shailbala, 2011). However, these attempts have provided no promise of practical control to date (Kiss, 2003) especially for small scale-farmers in Egypt.…”

Section: Introductionmentioning

confidence: 99%

Preventative and Curative Effects of Several Plant Derived Agents Against Powdery Mildew Disease of Okra

Moharam

Ali

2012

Not Sci Biol

View full text Add to dashboard Cite

The preventative and curative effects of some plant derived agents based on plant extracts or essential oils were studied at different concentrations against Erysiphe cichoracearum DC. ex Merat, the causal pathogen of okra powdery mildew by the detached leaf-disk and potted plants bioassays. Through detached leaf-disk assay, the highest mean preventative effect (97.74%) was recorded by neem seed oil followed by jojoba oil (89.82%) and extract of Rynoutria sachalinensis (82.77%). Neem seed oil at 1% was the most effective agent followed by jojoba oil and extract of R. sachalinensis at 1.5% and 2%, respectively, where they suppressed E. cichoracearum completely. Potted plants assay revealed that neem seed oil, jojoba oil and extract of R. sachalinensis as well as the fungicide (active ingredient dinocap) showed higher preventative efficacy at all leaf olds treated after 7 and 14 days of inoculation as compared with extracts of henna and garlic. Moreover, the preventative efficacy partly remained apparent after 14 days of inoculation at all leaf olds tested. In field trials through 2010 and 2011 growing seasons, when the first symptoms of powdery mildew appeared naturally, 1.5% jojoba oil, 2% extract of R. sachalinensis and 1% neem seed oil were sprayed individually twice on grown plants to evaluate their efficacy on controlling powdery mildew, growth and yield of okra. Resulted showed that neem seed oil was the most effective agent and highly decreased the disease severity to 29.92%, recorded the highly curative effect (68.15%) and also improved plant growth and pods yield.

show abstract

“…Powdery mildew, a widely-distributed and severely-destructive plant disease, is caused by airborne fungus (Erysiphe cichoracearum) (Ale-agha et al, 2008;Moharam and Obiadalla Ali, 2012). It can infect okra leaves, stems, or pods causing major (up to 17-86.6%) economic losses due to the reduction in pod quality and yield (Sridhar and Sinha, 1989;El Kot andHamza, 2011 andMoharam, 2013;Kakade et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Extensive use of fungicides will also result in environmental pollution in addition to development of new resistant strains of powdery mildew (Mcgrath, 2007;Kakade et al, 2020). In the light of the growing public concern and awareness about the negative effects of using fungicides, there is an obvious need to find eco-friendly, effective, and safe products to control powdery mildew El Kot and Hamza, 2011;Kakade et al, 2020). To control powdery mildew in okra and other plant species, several alternatives to fungicides such as oils, plant extracts, bio-agents, and salts have been studied (Pasini et al, 1997;Casulli, Santomauro and Faretra, 2000;Liang et al, 2005;Praveen and Dhandapani, 2008;Khalikar et al, 2011;Moharam and Obiadalla Ali, 2012;Tesfagiorgis et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Peroxy Acetic Aacid (PAA), Perbicarbonate (PB) and Potassium Silicate (PS) on Okra Growth, Yield and Resistance to Powdery Mildew

Tantawy

Abdalla

El-Ashmony

et al. 2020

Journal of Plant Production

View full text Add to dashboard Cite

Attempts are being made to minimize the use of synthetic chemicals such as fungicides. There is an interest toward the use of environmentally-friendly products to minimize impact of toxic residuals on human, animals, and environment. Two-season field experiments were conducted in 2018 and 2019to investigate the effectiveness of foliar sprayings of three products [potassium silicate (PS), perbicarbonate (PB), and peroxyacetic acid (PAA)] as singular or sequential treatments (totaling 10 treatment combinations) on growth (plant height, number of leaves, number of branches, leaf area), yield, yield attributes (number of pods plant-1 , pod length, pod weight), chlorophyll a, b, and carotene contents, and resistance of okra plants (cv. Baladi) to powdery mildew disease. All treatments were significantly reduced powdery mildew infection with highest resistance observed with PAA+PS or PAA+PB, or PB+PAA treatments. Growth characteristics were enhanced by most treatments with the highest increases detected with singular PS or PAA treatments and with sequential PB+PS treatment. PS was superior in increasing the number of leaves, branching number, and leaf areas. The only treatments that significantly increased total yield were PAA+PB, PAA, PS, PS+PAA, and PAA+PS with the former two treatments giving the highest total yield. In conclusion, foliar spraying of okra with singular or sequential treatments with PS, PAA, and PB significantly improved plant resistance to powdery mildew infection. Nevertheless, singular PS or PAA treatments as well as sequential PB+PS, PAA+PS, PS+PAA, and PAA+PB treatments were the most effective in improving growth and yield while controlling powdery mildew disease.

show abstract

Control of powdery mildew in okra using cultural filtrates of certain bio-agents alone and mixed with penconazole

Cited by 12 publications

References 25 publications

Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp

Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp

Preventative and Curative Effects of Several Plant Derived Agents Against Powdery Mildew Disease of Okra

Effectiveness of Peroxy Acetic Aacid (PAA), Perbicarbonate (PB) and Potassium Silicate (PS) on Okra Growth, Yield and Resistance to Powdery Mildew

Contact Info

Product

Resources

About