Effect of organic soil amendments on the incidence of brown spot disease in maize caused by <i>Physoderma maydis</i>

Osunlaja, S. O.

doi:10.1002/jobm.3620290806

Cited by 6 publications

(3 citation statements)

References 5 publications

(2 reference statements)

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“…This conforms to the findings of Obagwu et al [25] who reported Mancozeb as the most effective fungicide in inhibiting the growth of Colletotrichum capsici responsible for brown blotch of Bambara nut. Similar result was presented by Osunlaja and Alamutu [26] who also reported the effectiveness of Mancozeb in inhibiting the growth of Physoderma maydis (brown spot).…”

Section: Bio-efficacy Of Some Plant Extractssupporting

confidence: 87%

Efficacy of Fungicides and Plant Extracts against Fusarium oxysporum f. sp. batatas Incitant of Fusarium Wilt of Sweet Potato (Ipomeae batatas L.)

S. G.,

A. I.,

S. H.

et al. 2024

Asian J. Agric. Hortic. Res.

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In vitro experiments were conducted to evaluate the effect of some fungicides and some plant extracts against Fusarium oxysporum f. sp. batatas (Fob). The experiments were conducted in the Plant Pathology Laboratory of the Department of Crop Protection, Bayero University Kano. Three fungicides (Mancozeb, Hexaconazole and Metalaxyl + coprous oxide) and sterile distilled water as control were arranged in a completely randomized design. The treatments were repeated five times. Mancozeb as the most promising fungicide against the fungus was used as a check, other treatments include; 25% aqueous neem leaf extract, 50% aqueous neem leaf extract, 25% aqueous garlic bulb extract, 50% aqueous garlic bulb extract, 25% aqueous callotropis leaf extract, 50% callotropis leaf extract and control. The treatments were arranged in a completely randomized design and repeated thrice. Data on radial growth and percent growth inhibition of the fungus were recorded and subjected to analysis of variance using GenStat 17th Edition. Among the fungicides tested against Fob, Mancozeb significantly had the least radial growth (13mm) and inhibited growth of the pathogen by 71.1% compared to the other fungicides. Bioassay on plant extracts revealed least radial growth of the fungus (36.7mm) and highest percent growth inhibition (43.5%) when 50% aqueous neem leaf extract was used. This differed significantly with the use of 25% aqueous neem leaf extract which caused 39.3 mm radial growth of the fungus and inhibited growth by 38.5%. This was followed by 50% and 25% callotropis leaf extract, respectively with lower fungal growth and higher percent growth inhibition compared to aqueous garlic bulb extract at the different concentrations, exhibiting similar effect on the growth of the fungus and its inhibition. Aqueous neem leaf extract (50%) contained higher phytochemicals than the other botanical extracts at the different concentrations. These phytochemicals are responsible for better suppression of Fob. Application of 50% aqueous neem leaf extract could be further evaluated as potential bio-pesticide to supplement the use of fungicide against Fusarium wilt of sweet potato.

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Section: Bio-efficacy Of Some Plant Extractssupporting

confidence: 87%

Efficacy of Fungicides and Plant Extracts against Fusarium oxysporum f. sp. batatas Incitant of Fusarium Wilt of Sweet Potato (Ipomeae batatas L.)

S. G.,

A. I.,

S. H.

et al. 2024

Asian J. Agric. Hortic. Res.

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“…The effectiveness of soil amendment in controlling soil-borne plant disease was well documented (Osunlaja, 1989;Oritsajafor and Adeniji, 1990;Hadar and Mendaelbaum, 1992;Vos and Duriant, 1995). In this study with the exception of neem leaf amended soil significant differences in the amended and un-amended treatments were observed.…”

Section: Discussionmentioning

confidence: 43%

“…Controls consisted of a set of non inoculated pots for each age treatment and a set of inoculated unamended soil. Fungal populations in the amended soils and the control were determined by dilution plates method of Osunlaja (1989), using a soil dilution of 10~3 on potato dextrose agar to which the antibacteria supplement streptomycine had been added. The fungal colonies were counted on counting chambers, multiplying the numbers of colonies by dilution factors to obtain number of colonies per gram of soil.…”

Section: Soil Amendmentmentioning

confidence: 99%

The effect of plant age and soil amendments on severity of phytophthora root rot of pepper (Capsicum annuumL) in South Western Nigeria

Odebode

Shehu

2001

Archives of Agronomy and Soil Science

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The incidence and severity of pepper Capsicum annuum to phytophthora root rot caused by Phytophthora infestan in Southwestern Nigeria was investigated. Root rot incidence and severity was significantly reduced with increase in the plant age. The highest level of root rot, of 81.7% and 67.6% obtained in 4 and 6 weeks old pepper plants were reduced to 25% and 5% in 10 and 12 weeks old pepper plants respectively. The resistance of the pepper plant to root rot severity increased with age. The result also showed that amendments of the soil with chicken manure wood ash and neem leaf suppressed the root rot incidence and severity of disease in the pepper plant.

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Periphyton

2017

Periphyton

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Effect of organic soil amendments on the incidence of brown spot disease in maize caused by Physoderma maydis

Cited by 6 publications

References 5 publications

Efficacy of Fungicides and Plant Extracts against Fusarium oxysporum f. sp. batatas Incitant of Fusarium Wilt of Sweet Potato (Ipomeae batatas L.)

Efficacy of Fungicides and Plant Extracts against Fusarium oxysporum f. sp. batatas Incitant of Fusarium Wilt of Sweet Potato (Ipomeae batatas L.)

The effect of plant age and soil amendments on severity of phytophthora root rot of pepper (Capsicum annuumL) in South Western Nigeria

Periphyton

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