Screen House and Field Resistance of Taro Cultivars to Taro Leaf Blight Disease (Phytophtora colocasiae)

Fokunang, Tembe Estella; Grace, Mbong; Evelyn, Manju; Estella, Tembe Fokunang; Hanna, Rachid

doi:10.9734/bbj/2016/14317

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Furthermore, conventional breeding conducted not only for looking for higher yield advantage but also for quality traits and resistant genotype to disease, stress and for wider adaptability of the crop to different agro climates. Research findings resulted the availability of taro resistance cultivars against the taro leaf blight and possibility of yield improvement described in Nigeria [34] and in Cameroon [35] where it largely produced in Africa. Molecular breeding: Genotypic characterization of taro germplasm accessions under different ecological zones for comparative assessment of its genotype performances for crop improvement and the selection of desirable genotypes for breeding plays a vital role.…”

Section: Taro Breeding and Achievementsmentioning

confidence: 99%

Review of Taro (Colocasia esculenta) Genetics and Breeding

Banjaw¹

2017

J Hortic

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Germplasm screening, characterization and genetic improvement activities play great role in production and productivity of crops. Crop genetic evaluation can be conducted by morphological or molecular techniques and the available result has wide application in agriculture. Beside, appropriate breeding methods help to develop desirable plant character for further utilization depending on the identified gaps. Better understanding of crop genetic characteristics and breeding methods are useful in germplasm collection, conservation and utilization particularly in case of root and tuber crops. Different scientific findings on taro genetic characterization and breeding achievements were reviewed in this paper for further understanding and information dissemination. It was characterized largely based on morphological characters and few on molecular techniques and in both presence of variability that can be used in improvement programs was reported. Classical and modern taro breeding approaches utilized resulted in high yielding variety, disease resistant variety and drought resistant cultivar.

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Section: Taro Breeding and Achievementsmentioning

confidence: 99%

Review of Taro (Colocasia esculenta) Genetics and Breeding

Banjaw¹

2017

J Hortic

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Antifungal potential of cinnamon essential oils against Phytophthora colocasiae causing taro leaf blight

Hong

Kalhoro

Mujtaba

et al. 2021

Chem. Biol. Technol. Agric.

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Background Taro leaf blight, caused by a severely destructive oomycete fungus Phytophthora colocasiae, is responsible for threatening yield loss worldwide. The pathogen has the ability to germinate and spread rapidly to other plants during favorable conditions resulting in acute decline and even death, causing 100% crop loss. Farmers usually rely on highly toxic systemic fungicides to control the disease, which is effective, but residual effects and resistance of these agrochemicals is still a concern. Recently as returning to nature people tend to use chemical-free products, especially edible stuff produced in organic agriculture. Therefore, the use of bio-pesticides and phytochemicals is gaining special attention by scientists as they are ecofriendly non-hazardous, sustainable, and potent alternatives to control many virulent plant pathogens The present research was conducted to assess the antifungal potential of cinnamon essential oils against P. colocasiae. Materials and methods The essential oils from cinnamon bark were extracted using microwave-assisted hydrodistillation equipment, and then their chemical constituents were evaluated using ATR FTIR spectroscopy. The antifungal potential of essential oil was assessed against mycelium, sporangia, zoospore, leaf necrosis, and corms lesions under laboratory conditions at, 0.156, 0.312, 0.625, 1.25, 2.5, 5.0 mg/mL concentrations. Hymexazol was used as positive control and no essential oil as negative control, while each treatment have three replications and experiment repeated twice. Results The main component of oil was identified as cinnamaldehyde. The pathogen isolated from infected taro leaves was identified as P.colocasiae and then was used as a test fungus in the current study. Repeated experiments show maximum inhibition percentage of mycelial growth, zoospore germination, and sporulation of the fungus were observed at 0.625 mg/mL, whereas leaf necrosis was 100% inhibited at 1.25 mg/mL concentration. Conclusion This research can be a reference for easy, cost-effective and environment-friendly management and control of taro leaf blight with phytochemicals and plant essential oil derivatives. Graphic abstract

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Evaluation of Different Substrates Compositions for Acclimatization of Tissue Culture Taro Plantlets in a Propagator

Manju,

Fornkwav,

Bam

et al. 2023

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Taro is cultivated in most Regions of Cameroon and it is affected by taro leaf blight disease since 2010 which has decreased its production. Lack of disease-free planting materials has been a main problem to farmers. This study was carried out at International Institute of Tropical Agriculture (IITA) Yaounde and Institute of Agricultural Research for Development (IRAD) Bambui to assess different substrates for acclimatization of tissue culture taro plantlets in apropagator. No information is available on acclimatization of Cameroonian taro plantlets in different substrates. Taro plantlets from tissue culture were acclimatised in a propagator for six weeks under different substrates, the first substrate consisted of sterile three parts of soil and one part of river sand mixed together (3:1), the second substrate consisted of sterile two parts of soil and two parts of river sand mixed together (2:2), the third substrate consisted of sterile two parts of soil, one part of rice husk and one part of river sand mixed together (2:1:1) and the fourth substrate consisted of sterile one part of soil and three parts of river sand mixed together (1:3). After acclimatisation of the different taroplantlets (Dark green petiole with small leaves (L1), Red petiole with small leaves (L2), Light green petiole with large leaves (L3) and Light green petiole with small leaves (L4) in these four substrates, it was observed that the best growth rate of plant was recorded on substrate sand + soil (1:3). The other substrates showed moderate growth of plants. Substrate sand + soil (1:3) can be recommended for acclimatization of Cameroonian taro plantlets.

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Screen House and Field Resistance of Taro Cultivars to Taro Leaf Blight Disease (Phytophtora colocasiae)

Cited by 4 publications

References 6 publications

Review of Taro (Colocasia esculenta) Genetics and Breeding

Review of Taro (Colocasia esculenta) Genetics and Breeding

Antifungal potential of cinnamon essential oils against Phytophthora colocasiae causing taro leaf blight

Evaluation of Different Substrates Compositions for Acclimatization of Tissue Culture Taro Plantlets in a Propagator

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