Effects of sterile and non-sterile leachates extracted from composted eucalyptus bark and pine-bark container media on Phytophthora spp

Hardy, G.; Sivasithamparam, Krishnapillai

doi:10.1016/0038-0717(91)90158-g

Cited by 21 publications

(4 citation statements)

References 21 publications

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“…Leaf extracts of M. koenigi could control Pythium damping off at 67 % when applied via soil in tomato [18] as well as the efficacy of bark-debris of Eucalyptus against Phytophtora sp. was demonstrated [19] . Broad spectrum of antifungal activity was reported in the case of several test plants (1,2,6,13,17,19,25,26,27 The role of phytoalexins in defence mechanisms was intensively studied meanwhile to constitutive compounds has been paid less attention [15] .…”

Section: Resultsmentioning

confidence: 93%

“…was demonstrated [19] . Broad spectrum of antifungal activity was reported in the case of several test plants (1,2,6,13,17,19,25,26,27 The role of phytoalexins in defence mechanisms was intensively studied meanwhile to constitutive compounds has been paid less attention [15] . The term "phytoanticipin" was proposed for description of the latter group in 1994 and include all types of low molecular weight antimicrobial metabolites other than phytoalexins that are supposed to play role in disease resistance of plants [1] .…”

Section: Resultsmentioning

confidence: 93%

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Antisporulant Activity of Watery Extracts of Plants against Sclerospora graminicola Causing Downy Mildew Disease of Pearl Millet

Deepak¹,

Oros²,

Sathyanarayana³

et al. 2007

American J. of Agricultural and Biological Sciences

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Watery extracts of forty plant species commonly growing in across India have been screened for antisporulant activity against Sclerospora graminicola (Sacc.) Schroet., the causative agent of pearl millet downy mildew. The collection represented 38 genera of 30 families. The extracts of thirteen species did not show any effect, whereas the activity of extracts of Allium sativum, Clematis gouriana, Evolvulus alsinoides, Mimusops elengi, Parthenium hysterophorus, Piper nigrum and Tagetes erecta were commensurable to that of marketed botanical fungicides and Mikal 70 wp. The crude extracts of 12 species (Agave americana, Aloe vera, Artemisia parviflora, Citrus limon, Citrus sinensis, Eucalyptus globosus, Euphorbia hirta, Leucas aspera, Murraya koenigi, Ocimum sanctum, Santalum album and Zingiber offinale) completely inhibited the zoosprorangium formation while in the case of remaining 8 plants the crude extracts reduced only partially the sporulation. The antisporulant activity of commercialised Azadirachta preparation (Nutri-Neem) was more pronounced than that of Reynutria based one (Milsana) and Sabadilla (veratrin), however, these botanical preparations held off synthetic fungicides and the most active watery extracts.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 93%

Antisporulant Activity of Watery Extracts of Plants against Sclerospora graminicola Causing Downy Mildew Disease of Pearl Millet

Deepak¹,

Oros²,

Sathyanarayana³

et al. 2007

American J. of Agricultural and Biological Sciences

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“…Also, Bacillus spp., Enterobacter spp., Pseudomonas spp., Streptomyces spp., and other bacterial genera, as well as Penicillium spp., Aspergillus spp., Trichoderma spp., Gliocladium virens, and other fungi have been identified as biocontrol agents contained in compost. Hardy and Sivasithamparam [17] showed important suppressive effects against diseases caused by several plant pathogens such as Pythium spp. Moreover, compost is biodegradable, safe to apply, and less expensive to develop than fungicides.…”

Section: Introductionmentioning

confidence: 99%

Control of Fusarium Wilt of Tomato Caused byFusarium oxysporumF. Sp. Radicis-Lycopersici Using Mixture of Vegetable andPosidonia oceanicaCompost

Kouki

Saidi

Rajeb

et al. 2012

Applied and Environmental Soil Science

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A compost of vegetable waste andPosidonia oceanicamixture (70 : 30% vol : vol) was testedin vitroandin vivofor its efficacy againstFusarium oxysporumf.spradicis-lycopersici(Forl), the causal agent of Fusarium wilt of Tomato (Lycopersicon esculentumcv. chourouk).The incorporation of non-sterilized VPC in the culture medium showed potent antifungal activity against Forl and complete inhibition of mycelium growth was observed for all the tested compost rates (0.5, 1, 2, 4, 6, 8, 10, 15 and 20%). However, only the highest rates (15 and 20%) of a sterilized suspension of VPC were effective in preventing mycelial growth. Nine indigenous bacterial strains isolated from VPC exhibited antagonism against Forl. Based on 16S rDNA sequence analysis, the isolates were assigned toBacillus sphaericus(B12 and BS2),Pseudomonas putidaPPS7 andBurkholderia gladioliBuC16. Under green house condition, seed inoculation by B12, BS2, PP7 and BuC16 strains protected significantly tomato againstFusarium oxysporumf.spradicis-lycopersici(Forl) attacks.

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“…Colonization of such a mix by biocontrol agents is then rendered much easier. In addition, the incorporation of a biocontrol agent growing on a suitable substrate into a planting mound or later as a mulch may be feasible (12,20,21,22).…”

Section: Introductionmentioning

confidence: 99%

Biological control of Phytophthora root rot of avocato with microorganisms grown in organic mulches

Costa¹,

Menge²,

Casale³

2000

Braz. J. Microbiol.

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Organic mulches colonized with microbial biocontrol agents, termed bioenhanced mulches, were tested for their ability to reduce Phytophthora root rot of avocado (Persea americana Mill.). Benomyl-resistant mutants of Gliocladium virens (KA 230-1) and Trichoderma harzianum (KA 159.2) isolated from suppressive soils and selected as efficient antagonists of P. cinnamomi were evaluated for their ability to colonize different mulches under controlled laboratory conditions. Sudangrass and a coarse yardwaste were found to be better substrates than a fine yardwaste, woodwaste or rice hulls for biocontrol agents propagules production. The most suitable conditions for colonization were an optimum temperature of 24°C, a moisture content of 20% for sudangrass and 30% for the coarse yardwaste, and a continuous light exposure during a 15-day incubation period. In the greenhouse, fresh sudangrass and a coarse yardwaste colonized with G. virens and used as a surface mulch proved to be the best combination for reducing the population of P. cinnamomi in 4-liter pots containing artificially-infested soil. Healthy avocado roots made up 31-37% of the roots in the G. virens-mulch combinations compared to 0% healthy in infested controls after two months.

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Effects of sterile and non-sterile leachates extracted from composted eucalyptus bark and pine-bark container media on Phytophthora spp

Cited by 21 publications

References 21 publications

Antisporulant Activity of Watery Extracts of Plants against Sclerospora graminicola Causing Downy Mildew Disease of Pearl Millet

Antisporulant Activity of Watery Extracts of Plants against Sclerospora graminicola Causing Downy Mildew Disease of Pearl Millet

Control of Fusarium Wilt of Tomato Caused byFusarium oxysporumF. Sp. Radicis-Lycopersici Using Mixture of Vegetable andPosidonia oceanicaCompost

Biological control of Phytophthora root rot of avocato with microorganisms grown in organic mulches

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