Agronomic Performance and Economics of Yield Loss Associated With Angular Leaf Spot Disease of Common Bean in the Southern Highlands of Tanzania

Mongi, Rose; Tongoona, Pangirayi; Shimelis, Hussein; Sibiya, Julia

doi:10.1094/pdis-04-17-0547-re

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…In a fungicide study on the control of angular leaf spot [Pseudocercospora griseola (Sacc.) Crous & Braun] of dry beans in Tanzania, Mongi et al (2018) demonstrated that the yield components of various treatments were strongly influenced by the amount of rain received during the growing season because of its influence on disease development. Habtu and Zadoks (1995) speculated that the effect of bean rust [Uromyces appendiculatus (Pers.)…”

Section: Discussionmentioning

confidence: 99%

Effects of seed infection and hydration on the buildup of common bacterial blight and its impact on the yield of dry beans

Conner

McRae²,

Hwang

et al. 2021

Can. J. Plant Sci.

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Common bacterial blight (CBB), caused by Xanthomonas axonopodis pv. phaseoli (Xap), is a serious foliar disease of dry bean (Phaseolus vulgaris). A four-year field study examined the effects of different sources of infection and seed hydration on CBB development, yield components and yield in seven resistant or susceptible dry bean lines and cultivars. The five agronomic treatments examined included clean seed, diseased seed, hydrated diseased seed, clean seed with a Xap spray and diseased seed with a Xap spray. Disease development, the yield components and yield were strongly influenced by weather conditions. In comparison with the diseased-seed treatment, the use of clean (disease-free) seed reduced the incidence of CBB leaf infection in the susceptible dry bean cultivars, but no similar benefit was observed in the resistant lines and cultivars. During the three dry growing seasons, the seed hydration treatment increased the incidence of CBB leaf infection compared with the diseased-seed treatment for the susceptible cultivars, but not for the resistant lines and cultivars. In the wet growing season, no significant difference in the incidence of leaf infection was observed between the hydrated seed and diseased-seed treatments in any of the cultivars, possibly because the wet soil conditions promoted pathogen development within the bean plants that year. Seed hydration did not improve seed yield in the dry years, but sometimes decreased it under wet conditions. Therefore, seed hydration cannot be recommended for use in the production of dry beans.

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Section: Discussionmentioning

confidence: 99%

Effects of seed infection and hydration on the buildup of common bacterial blight and its impact on the yield of dry beans

Conner

McRae²,

Hwang

et al. 2021

Can. J. Plant Sci.

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“…The increase in land acreage under common bean production by farmers attempting to meet the increasing local and regional demand has been challenged by many abiotic and biotic stresses [20], of which insect pests [21] and diseases including angular leaf spot [7], common bacterial blight [22], anthracnose and root rots [23] are major. The effects of the numerous pests and diseases range from mild symptoms to severe plant damages, which normally result in significant yield losses [10] [24]. To increase the yield and production of common beans by the majority small-holder farmers, integration of effective and economically viable resources or practices for management of the abiotic and biotic constraints is essential.…”

Section: Discussionmentioning

confidence: 99%

“…Angular leaf spot is major disease in the sub-Saharan regions where it has caused yield losses of 61% [24].…”

Section: Discussionmentioning

confidence: 99%

Efficacy and Cost-Benefit Analysis of Indigenous Technical Knowledge versus Recommended Integrated Pest and Disease Management Technologies on Common Beans in South Western Uganda

Kankwatsa¹

2018

OALib

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The common bean is the second most important food and third economically important crop after banana and coffee in the South Western Agro-Ecological Zone of Uganda. Farmers' returns to investment in bean production are consistently negative mainly due to losses resulting from collective effects of insect pests and diseases that cause damages at the various plant growth stages. This research study was carried out to 1) identify the major insect pests and diseases affecting the common beans in the zone; 2) test and compare the performance of the local/traditional practices versus integrated pest and disease management (IPDM) technology combinations; 3) determine the yield performance of improved varieties under the different pest control practices; 4) evaluate the profitability of the different pest and disease management practices. Results showed that cutworm, thrips, aphid and defoliating beetles were the major insect pests, while angular leaf spot, ascochyta blight, anthracnose and the bean common mosaic virus (BCMV) were the major diseases. Improved varieties managed with the recommended IPDM technology combination were more protected compared to the farmers' indigenous practices. The climbing varieties had significantly higher yield (3.4 t/ha) than the local bush variety (1.2 t/ha). Consequently, the application of indigenous practices resulted in negative returns to investment while the combination of research recommended technologies including judicial inorganic pesticide application led to positive returns to investment in bean production. The marginal rate of return (MRR) of IPDM technologies including inorganic pesticides was two times greater, implying that integration of improved variety with recom-

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“…A yield loss that reached up to 80% had been reported on susceptible common bean genotypes under severe conditions of infection [6]. Mongi [13], reported yield losses of up to 61% in Southern Tanzania. Stenglein et al [14], reported that for every 10% increase in ALS severity results in 7.9% yield loss.…”

Section: Angular Leaf Spot (Als)mentioning

confidence: 96%

Status of Common Bean (Phaseolus vulgaris L.) Diseases in Metekel Zone, North West Ethiopia

Degu¹,

Yaregal²,

Gudisa³

2020

J Plant Pathol Microbiol

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Common bean has versatile benefits such as nutritional, environmental and economic benefits for the producers and consumers. However, its production has been affected and threatened by a number of biotic factors. Survey was conducted in 2018/19 cropping season within three woredas of Metekel Zone, Benshangul-Gumz region, Ethiopia, with the objective of identifying and prioritizing haricot bean diseases.The result revealed that haricot bean production in the Zone is affected by eleven diseases which are caused by fungi, bacteria and virus. Based on the disease severity, incidence and prevalence scores, the diseases are categorized in to Major, intermediate and Minor disease. Angular Leaf Spot (Pseudocercospora griseola), Anthracnose (Colletotrichum lindemuthianum), Floury leaf spot (Mycovellosiella phaseoli), and Cercospora leaf spot (Cercospora cruenta are grouped in to major diseases. Rust (Uromyces appendiculatus), Web blight Rhizoctonia solani Kühn (teleomorph Thanatephorus cucumeris (Frank) Donk), Ascochyta blight (Phomaexigua var. exigua/Ascochyta phaseolorum acc) and Bean common mosaic virus (potyvirus) are categorized as Intermediate and the remaining three diseases: Halo blight (Pseudomonas syringaepv. phaseolicola), Common Bacterial Blight (Xanthomonas axonopodis pv phaseoli) and Downy Mildew (Phytophthora phaseoli Thaxt) are grouped under minor diseases. The survey revealed, the common bean production and disease management practices and variety development efforts for the Zone, onwards, should focus on those major disease (such as Angular Leaf Spot, Anthracnose, Floury leaf spot, and Frog Eye leaf spot) in order to sustain production and productivity of common bean cultivars.

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Agronomic Performance and Economics of Yield Loss Associated With Angular Leaf Spot Disease of Common Bean in the Southern Highlands of Tanzania

Cited by 10 publications

References 13 publications

Effects of seed infection and hydration on the buildup of common bacterial blight and its impact on the yield of dry beans

Effects of seed infection and hydration on the buildup of common bacterial blight and its impact on the yield of dry beans

Efficacy and Cost-Benefit Analysis of Indigenous Technical Knowledge versus Recommended Integrated Pest and Disease Management Technologies on Common Beans in South Western Uganda

Status of Common Bean (Phaseolus vulgaris L.) Diseases in Metekel Zone, North West Ethiopia

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