Response of tomato cultivars to irrigation management strategies employed by emerging farmers in the Greater Giyani Municipality

Lebea, Tebogo Johannes; Jovanovic, Nebo; Kena, Mapotso Anna; Ayisi, Kwabena Kingsley; Mushadu, Wisani G

doi:10.1080/02571862.2021.1913767

Cited by 1 publication

(2 citation statements)

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“…Alternaria leaf blight is highly destructive with the probability of 100% yield reductions under favourable conditions (Eli-Khallal, 2007). Alternaria leaf blight has become the most devastating disease in tomato production under the Limpopo conditions, causing huge economic losses to the crop under eld and greenhouse production (Lebea et al, 2021;Mphahlele et al, 2018). Climatic factors such as hot conditions, heavy dew during morning hours and uctuating relative humidity are common and are highly favourable for the development of tomato early blight (Vennila et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…This reduces the photosynthetic rate of the affected leaves. All tomato cultivars grown in the province are susceptible to early blight (Lebea et al, 2021;Mphahlele et al, 2018). The pathogen produces lots of asexual spores mainly conidia and chlamydospores which are easily spread by wind and rain and serve as sources of primary inoculum (Chaudhary et al, 2021;Pandey et al, 2021;Niu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the methanol extracts of Monsonia burkeana against Alternaria solani growth, leaf blight severity and tomato yield

Sibuyi,

Kena,

Ayisi

2023

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Alternaria leaf blight, caused by Alternaria solani, is one of the major foliar diseases of tomato. Synthetic fungicides remain an integral component of managing Alternaria leaf blight to reduce yield losses. However, their negative side effects on the environment, human health and increased pathogen resistance call for the exploration of alternative control measures that are environmentally safe. The current study was established to evaluate the effectiveness of Monsonia burkeana methanolic extract against A. solani growth under laboratory conditions, Alternaria leaf blight and its ability to increase tomato yield. The antifungal activities of Monsonia burkeana methanolic extract were tested under laboratory conditions through food poisoning assay at concentrations 1, 2, 3, 4, and 5g/100ml. The study was arranged in a Completely Randomized Design (CRD) replicated four times. Monsonia burkeana methanolic extract significantly (P ≤ 0.05) inhibited the mycelium growth of A. solani and a significant reduction was recorded at 5 g 100 ml− 1 (32.25%). Greenhouse and micro-plot experiments were established where treatments were: 5g/100ml M. burkeana extract, inoculate non-treated control and non-inoculated, non-treated control. Plants were arranged in a Randomized Complete Block Design (RCBD) and each treatments replicated four times. Disease severity was measured using a scale of 0–5 after 21 days. Monsonia burkearna methanolic extract significantly reduced Alternaria leaf blight severity of 10% and less under both greenhouse and micro-plot respectively when compared to inoculated non-treated control. Treated tomato plants had a significantly higher chlorophyll content and Normalized Difference Vegetative Index.

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Section: Introductionmentioning

confidence: 99%