Reaction of Bipolaris euphorbiae to environmental factors and its tolerance to solar and ultraviolet radiation

Moraes, Camila de; Monteiro, Ana Ruth Macêdo; Mochi, Dinalva Alves

doi:10.1007/s11274-010-0597-y

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…These effects reduce the activity of the fungus on the host Chelico and Khachatourians, 2008). Conidia of B. euphorbiae are tolerant to solar and ultraviolet radiation, and remain viable (germination > 92%) after 8 h of exposure to radiation emitted by a solar simulator or 90 min of exposure to germicidal UV radiation, without the use of any formulation (Moraes et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…Melanin is also associated with protection against high temperatures and chemical stresses such as the presence of heavy metals and oxidizing agents (Allam and Abd ElZaher, 2012). Although the results achieved by Moraes et al (2011) have shown that B. euphorbiae is quite tolerant Original values and statistical analysis of sporulation and germination performed with data transformed into log x and arc sin (x/100), respectively. Means followed in the column by at least one common letter do not differ by the Tukey test (p ≥ 0.05).…”

Section: Resultsmentioning

confidence: 99%

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Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Machado¹,

Monteiro²,

Mochi³

2016

Afr. J. Microbiol. Res.

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Adjuvants incorporation at formulations can positively influence the performance of bioagent control, contributing to preservation of the inoculum until being used. Adjuvants should not be toxic to pathogen and tests that evaluate the sensitivity of biologic products are essential. The aim of this study was to analyze the compatibility of the anti-wetting agents microcrystalline cellulose, anhydrous sodium carbonate, magnesium oxide, talc, calcium carbonate, silicon dioxide, and photoprotectants NeoHeliopan ® AV, NeoHeliopan ® E1000, Eusolex ® 6007, NeoHeliopan ® Hydro, Tinosorb ® M, Eusolex ® 232 and a Complex filters UVA/UVB with the fungus Bipolaris euphorbiae, in order to select products to formulate a fungus-based bioherbicide. All products were used in concentrations of 0.01, 0.05, 0.1, 0.5 and 1%. After evaluating vegetative growth, sporulation, and germination, the products were toxicologically classified by calculating the biological index. The anti-wetting agents calcium carbonate, talc, microcrystalline cellulose, and silicium dioxide did not interfere in the development of the fungus, and were deemed compatible. The photoprotectant Tinosorb ® M was classified as compatible with the fungus in all concentrations used, a similar outcome to Eusolex ® 6007, except at 1.0% concentration. Most of the other photoprotectants were compatible in concentrations ranging between 0.01 and 0.1%, except for Complex filters UVA/UVB at 0.05% and NeoHeliopan ® E1000 at 0.1%. NeoHeliopan ® Hydro was rated moderately toxic to the fungus in all concentrations used. Conidial germination was less affected than growth and sporulation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Machado¹,

Monteiro²,

Mochi³

2016

Afr. J. Microbiol. Res.

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“…The pH of the media was standardised to 6 in all the media (Moraes et al, 2011). The media (100 mL) were added to 250-mL Production of a bioherbicide agent in liquid and solid medium ... Erlenmeyer flasks and autoclaved at 121 o C and 1 kgf cm -2 for 30 min.…”

Section: Liquid Media Preparationmentioning

confidence: 99%

Production of a bioherbicide agent in liquid and solid medium and in a biphasic cultivation system

et al. 2014

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-The use of fungi in weeds control programs depends upon the conidia production in large scale. Therefore, this study aimed to evaluate liquid and solid culture media and the cultivation by biphasic system for the conidia production of Bipolaris euphorbiae Muchovej & Carvalho a specific pathogen of Euphorbia heterophylla. The liquid media were obtained from agro-industrial waste or by-products, and the solid media were prepared with mixtures of grains and grain derivatives. The liquid medium made with sugar cane molasses stood out from the others because it provided great sporulation (23 x 10 4 conidia mL -1 of medium), conidial viability (99.7%), and formation of mycelial fungal biomass (1.26 g 100 mL -1 of medium). On solid media conidial production was markedly higher than in liquid media, especially the medium composed by a blend of sorghum grain (40%) and soybean hulls (60%) where the fungus produced 2.3 x 10 7 conidia g -1 of medium. The cultivation of B. euphorbiae in biphasic system not promoted a significant increase in the production of conidia. The solid media were more effective for the mass production of fungus and mixtures of grains and derivatives were effective for increasing conidia production.Keywords: Bipolaris euphorbiae, Euphorbia heterophylla, biological control, weed control, fungus production, natural substrates. RESUMO -O uso de fungos em programas de controle de plantas daninhas depende da produção

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Reaction of Bipolaris euphorbiae to environmental factors and its tolerance to solar and ultraviolet radiation

Cited by 2 publications

References 13 publications

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Production of a bioherbicide agent in liquid and solid medium and in a biphasic cultivation system

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