Impact of Fungicide Application on Taro Leaf Blight Disease in Three Regions of Cameroon

Manju, E.B.; Fokunang, C. N.; Mbong, Grâce Annih; Tima, T.S.; Suh, Christopher; Tembe-Fokunang, Estella; Hanna, Rachid

doi:10.9734/jeai/2017/33915

Cited by 6 publications

(8 citation statements)

References 5 publications

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“…This effect may be attributed to the differences in the concentration of copper in the fungicides as Nordox 75 WG has the highest concentration. The significant differences observed in disease incidence and severity between fungicides treated plots and the control plots indicate that all the tested fungicides were able to manage the disease [39]. Incidence and severity of taro leaf blight disease decreased in all taro plots sprayed with Ridomil Gold Plus 66 WP, Metalm 72 WP and Nordox 75 WG during the two planting seasons at all the trial locations.…”

Section: Sed = Standard Error Of Differencementioning

confidence: 88%

Improvement in the Management of Leaf Blight Disease of Taro (Colocasia esculenta) with Copper and Metalaxyl Fungicides

Omane

Oduro

Cornelius

et al. 2020

JEAI

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Taro (Colocasia esculenta (L.) Schott) is an important staple food crop for millions of people in developing countries. Taro production is constrained by many diseases of which leaf blight, caused by Phytophthora colocasiae Raciborski, is the most destructive and it accounts for up to 80% yield loss of taro in many countries. In Ghana, the disease accounts for 25 – 50% yield loss. Non-sustainability of cultural control method and the use of resistant varieties have compelled some farmers to abandon their fields while others have converted their farms to dry season vegetable farming. In this study, copper and metalaxyl fungicides were tested for the control of leaf blight disease of taro. In vitro fungicidal activity tests and field evaluation showed that Ridomil Gold Plus 66 WP (6% metalaxyl-M + 60% copper (I) oxide) and Metalm 72 WP (12% metalaxyl + 60% copper (I) oxide) at 50 g in 15 litres of water (3.3g/L) and Nordox 75 WG (86% cuprous oxide) at 75 g in 15 litres of water (5 g/L) are effective for the control of leaf blight disease of taro at 4 weekly intervals for five consecutive months in the wet season.

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Section: Sed = Standard Error Of Differencementioning

confidence: 88%

Improvement in the Management of Leaf Blight Disease of Taro (Colocasia esculenta) with Copper and Metalaxyl Fungicides

Omane

Oduro

Cornelius

et al. 2020

JEAI

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“…The disease severity was 75% in control but lower in treated plots. Manju et al [18] utilized foliar sprays of Fungiforce™ (i.e. contact and systemic fungicide from Copper oxide (600 g) and Metalaxyl (120 g)) at different concentrations to effectively control taro leaf blight.…”

Section: Separation Of the Means Of The Treatmentsmentioning

confidence: 99%

Antimycotic Inhibition of Phytophthora colocasiae (Taro Leaf Blight) Using Diverse Disease Management Paradigms

Mjaika

2023

Indonesian J. Agric. Res

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Cocoyam/taro production has been plagued with many constraints, especially taro leaf blight. This study aimed at providing useful control options for the management of taro leaf blight. Two in vitro sub-trials (using botanicals alone or chemicals+botanicals) were conducted. A completely randomized design with each treatment replicated thrice was used and analyzed at a 95% confidence level. P. colocasiae was effectively inhibited by Balsam, Thyme, Lantana, Eucalyptus, and Alligator-pepper up to 144 Hours After Inoculation (HAI) with a 144-HAI-moving average of 69.5%. At 48, 96, and 144 HAI, Eucalyptus 100% concentration, Thyme (50 and 100%), Lantana 100%, and Alligator-pepper (50 and 100%) were excellent control resources. Percentage inhibition of the pathogen by plant extracts ranged from 13.8-100%. Combinations of Mancozeb and MetCop (i.e. Metalaxyl+Copper(I)oxide) with botanicals (Balsam, Lantana, and Thyme) controlled P. colocasiae. Inhibition of radial growth of P. colocasiae ranged from 0-100% with a 168-HAI-moving average of 55.5%. Combining Thyme with Mancozeb or MetCop significantly inhibited P. colocasiae more compared to other treatments. Mancozeb+Balsam 50% and MetCop+Balsam 100%, followed by Mancozeb+Lantana 100%, MetCop+Lantana 100%, and Mancozeb+Balsam 100% were the best treatments. Mancozeb was better than MetCop. Chemical rates can be reduced by using botanicals since chemicals affect health.

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“…These applications were done at two-week intervals following the onset of the first taro blight symptoms on leaves. Data on the taro blight severity was collected at two weeks interval for six weeks [15]. The data on disease severity was collected only from the middle plants on each ridge because the edges of the ridges served the role of pathogen invasion.…”

Section: Application Of Fungicide On Taro Leaf Blight Diseasementioning

confidence: 99%

“…In the absence of adequate application strategies, fungicide control seems to be the fastest and most effective method of taro blight control [15]. Therefore, the objective of this study was to evaluate the use of fungicide in the control of taro leaf blight disease in three agroecological zones of Cameroon.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fungicide against Taro Leaf Blight Disease Caused by Phytophthora colocasiae in Three Agro-Ecological Zones of Cameroon

Teke

Suh

et al. 2020

ARJA

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Globally the taro leaf blight (Phytophthora colocasiae) disease causes between 50 to 70% yield loss. Four taro landraces were planted in three agroecological zones of Cameroon; the Western Highlands (Bambui), Mono-Modal Humid Forest (Ekona), and the Bimodal Humid Forest (Nkolbisson) and evaluated for taro blight severity in four successive growing seasons in March and July, 2018 and 2019. Different concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide were applied to control taro blight before and during plant growth. Results showed that, in all the field sites, the disease severity of Phytophthora colocasiae greatly decreased below 1.5 with varying concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide applied at two-week intervals. The control field at Ekona recorded the highest taro blight severity of 7.8. There was no significant difference in taro blight severity (P≤0.05) between landraces treated with the different concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide. Therefore, lower concentrations (0.33% and 0.27%) of copper oxide (600 g)–Metalaxyl (120 g) can be effectively used in the pre and post control of taro blight in the field. All the landraces in the screen house experiments were susceptible to P. colocasiae. In all the zones, Landrace L2 (red petiole small leaves) was highly resistant to P. colocasiae and should be recommended to farmers for optimum taro production in the three agro-ecological zones and zones with similar characteristics.

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Impact of Fungicide Application on Taro Leaf Blight Disease in Three Regions of Cameroon

Cited by 6 publications

References 5 publications

Improvement in the Management of Leaf Blight Disease of Taro (Colocasia esculenta) with Copper and Metalaxyl Fungicides

Improvement in the Management of Leaf Blight Disease of Taro (Colocasia esculenta) with Copper and Metalaxyl Fungicides

Antimycotic Inhibition of Phytophthora colocasiae (Taro Leaf Blight) Using Diverse Disease Management Paradigms

Evaluation of Fungicide against Taro Leaf Blight Disease Caused by Phytophthora colocasiae in Three Agro-Ecological Zones of Cameroon

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