Efficacy of new EC formulations of neem oil and pungam oil for the management of sheath rot disease of rice

Narasimhan, V.; Rajappan, Kim; Ushamalini, C.; Kareem, Abdul

doi:10.1007/bf02981444

Cited by 10 publications

(8 citation statements)

References 5 publications

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“…Therefore, the formulation of these metabolites must be introduced to overcome their degradation and to be used practically during handling and application as biocides. In accordance, Narasimhan et al (1998) demonstrated that neem oil (Azadiracta indica) and pungam oil (Pongamia pinnata) emulsifiable concentrate (EC) formulations had been evaluated for their efficacy against sheath rot (Sarocladium oryzae) of rice. Gascon et al (1999) showed that the essential oils of rosemary, jarilla mendocina, tomillo mendocina, origanum, tarragon, lavandins and eucalyptus were emulsified with different formulations of water suspensions of wall support systems using both a hand-held propeller-blender and a high pressure double-effect homogenizer.…”

Section: Introductionmentioning

confidence: 88%

Biocides formulation of essential oils having antimicrobial activity

Seoud

Sarhan

Omar

2005

Archives Of Phytopathology And Plant Protection

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Essential oils of fennel, peppermint, caraway, eucalyptus, geranium and lemon were tested for their antimicrobial activities against some plant pathogenic micro-organisms (Fusarium oxysporum, Alternaria alternate, Penicilium italicum Penicilium digitatum and Botyritus cinerea). Essential oils of fennel, peppermint, caraway were selected as an active ingredient for the formulation of biocides due to their efficiency in controlling the tested micro-organisms. Successful emulsifiable concentrates (biocides) were prepared from these oils using different emulsifiers (Emulgator B.L.M. Tween20 and Tween80) and different fixed oils (sesame, olive, cotton and soybean oils). Physico-chemical properties of the formulated biocide (spontaneous emulsification, emulsion stability test, cold stability and heat stability tests as well as viscosity, surface tension and pH) were measured. The prepared biocides were ready to be tested for application in a future work as a safe pesticide against different pathogens.

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Section: Introductionmentioning

confidence: 88%

Biocides formulation of essential oils having antimicrobial activity

Seoud

Sarhan

Omar

2005

Archives Of Phytopathology And Plant Protection

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“…CA may exert a vital effect on plants through its involvement in the tricarboxylic acid cycle, which produces energy in the form of adenosine triphosphate. Furthermore, CA is known to inhibit mycelial growth of the fungi Helminthosporium oryzae and Pyricularia oryzae, which caused grain discoloration in rice (Oryza sativa), and also that of Sarocladium oryzae, which was involved in the sheath rot disease of rice (Narasimhan et al, 1998;Rajappan et al, 2001). Plants secreted organic acids such as CA, malic acid, and oxalic acid from their roots when subjected to abiotic stresses, particularly during exposure to elevated aluminium concentrations or under phosphorus-deficient conditions (Ma and Furukawa, 2003;Nian et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

Effects of Citric Acid, Sucrose, and Proton Concentration in Suppressing Defoliation in Hibiscus Plants Grown under Low-illumination Conditions

Zhang

Livingstone

Tarui

et al. 2009

hortte

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Potted young hibiscus (Hibiscus rosa-sinensis ‘Italian Red’) plants were placed in a postharvest environment under low-illumination conditions in a room from 22 July to 31 Dec. 2003. On treatment with a mineral nutrition (MN) solution, 19% of their leaves remained intact after 8 weeks, but all the leaves were lost after 12 weeks from the time of placement. Incorporation of citric acid (CA) into the MN solution at a final concentration of 5 mm considerably suppressed the defoliation so that 57% of the leaves remained intact after 8 weeks and 53% did so after 12 weeks from the time of placement. Furthermore, treatment with 3% sucrose (SUC) instead of CA also considerably suppressed the defoliation, with 26% of the leaves remaining intact for more than 8 weeks and 20% remaining intact for more than 12 weeks. Neither the CA nor the SUC solution was effective in maintaining the hibiscus plants for more than 20 weeks under low illumination. However, treatment with MN solution containing CA and SUC was highly effective in suppressing defoliation. About 60% of the leaves on the plants that were treated with the solution were retained for the entire 24-week period. The proton concentration of the organic solution was found to be a critical factor that affected plant maintenance. The plants survived only on treatment with a solution of pH 5.0, but not with one with a pH of 6.0 or 7.0.

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“…PO 60 EC (citric acid). The formulations were tested against two fungal diseases of rice, viz., sheath rot (Narasimhan et al 1998) and grain discolouration (Rajappan et al 2001).…”

Section: * Mean Of Seven Replicationsmentioning

confidence: 97%

“…Anjurani et al (2006) reported that neemshield's neem oil reduced the disease incidence of late blight of potato in subtropical plants. Neem and pungam oil based emulsifiable concentrate formulations were developed by Narasimhan et al (1998) viz., NO 60 EC (citric acid), NO 60 EC (acetic acid) and NO ? PO 60 EC (citric acid).…”

Section: * Mean Of Seven Replicationsmentioning

confidence: 99%

Efficacy of new EC formulation derived from garlic creeper (Adenocalymma alliaceum Miers.) against anthracnose and stem end rot diseases of mango

Aswini

Prabakar

Rajendran

et al. 2009

World J Microbiol Biotechnol

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Different leaf extracts of Garlic creeper (Adenocalymma alliaceum Miers.) using water and solvents were prepared and they were screened for their antifungal activity against Colletotricum gloeosporioides Penz. and Botryodiplodia theobromae Pat. causal agents of mango post harvest diseases viz., anthracnose and stem end rot respectively. Among the extracts tested, chloroform extract was found to be highly effective in inhibiting the spore germination of C. gloeosporioides by 84.62% and B. theobromae by 84.50% followed by methanol extract. The extracts were also inhibitory to the mycelium. Ammonium sulphate precipitation and SDS-PAGE analysis of the extract indicated the presence of a major protein with a molecular weight at 65 kDa. Two blue spots at Rf 0.96 and 0.80 was also observed in TLC analysis and the presence of tannic acid, resorcinol was evident from HPLC analysis. Treatment of fruits with leaf extract of A. alliaceum increased the activities of peroxidase, polyphenol oxidase, phenylalanine ammonialyase and sugars with significant reduction in starch, phenolics, protein and ascorbic acid. The extract was partially purified and formulated as ADENOCAL 60 EC for the management of post harvest diseases of mango fruits.

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Efficacy of new EC formulations of neem oil and pungam oil for the management of sheath rot disease of rice

Cited by 10 publications

References 5 publications

Biocides formulation of essential oils having antimicrobial activity

Biocides formulation of essential oils having antimicrobial activity

Effects of Citric Acid, Sucrose, and Proton Concentration in Suppressing Defoliation in Hibiscus Plants Grown under Low-illumination Conditions

Efficacy of new EC formulation derived from garlic creeper (Adenocalymma alliaceum Miers.) against anthracnose and stem end rot diseases of mango

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