Incidence and Severity of Bean Rust (Uromyces appendiculatus) in Alleys between Leucaena Hedgerows in Kenya

Koech, E. K.; Whitbread, R.

doi:10.1007/s11056-005-8680-1

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…Shorter duration of leaf wetness in ASP system was consistently observed over an eight-week evaluation, similar to the observation inside the bean canopy in a Leucaena leucocephala alley (Koech and Whitbread 2006). Leaf wetness was also the microclimatic characteristic most related with PM on soybean (Table 2).…”

Section: Discussionsupporting

confidence: 79%

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Microclimate in agrosilvopastoral system enhances powdery mildew severity compared to agropastoral and non-integrated crop

Roese

Ribeiro

Mio

2017

Trop. plant pathol.

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While integrated crop-livestock systems including trees have received more attention during the last two decades, the epidemiology of plant diseases in these production systems is still poorly understood. Microclimatic modifications due to the type of cropping system adopted may affect the epidemic patterns. This work aimed to evaluate whether powdery mildew severity on oats (Avena strigosa and A. sativa) and on soybean (Glycine max) are affected by the cropping system and which microclimatic factors are associated with disease development. A long-term experiment was conducted t o c o m p a r e t h r e e s y s t e m s : a g r o p a s t o r a l (A P) , agrosilvopastoral (ASP) and non-integrated crop (CO). Two rates of nitrogen (N) were applied for AP and ASP. Powdery mildew severity on oats in ASP was approximately 20× greater than in the others systems. On soybean, powdery mildew varied across systems but it was more severe in ASP, with at least 4× greater disease severity than in the other systems. Likewise, conidia of Microsphaera diffusa collected in spore traps in ASP were consistently higher than in the others systems. ASP showed shorter leaf wetness duration, higher daylight relative humidity (RH), and lower temperature amplitude compared with the other systems. Multiple regression analysis showed that leaf wetness duration and daylight RH explained best the disease variation on soybean. Our data suggest that microclimatic conditions in the ASP system are likely the main drivers of more severe powdery mildew epidemics.

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Section: Discussionsupporting

confidence: 79%

“…In a meta-analysis to evaluate effects of agroforestry on pest, disease and weed control based on 42 papers (Pumariño et al 2015), only one from Koech and Whitbread (2006) was about plant disease. This work showed lower bean rust inside an alley cropping than outside, and results were related with microclimate.…”

Section: Introductionmentioning

confidence: 99%

Microclimate in agrosilvopastoral system enhances powdery mildew severity compared to agropastoral and non-integrated crop

Roese

Ribeiro

Mio

2017

Trop. plant pathol.

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“…crops, such as cocoa (Isaac et al 2007), chilli pepper, millet (Kho et al 2001) and coffee. In studies where microclimatic conditions were reporting negative effects in tree-crop systems, it was mainly due to reduced photosynthetically active radiation in semi-arid zones (McIntyre et al 1997;Ong et al 2000;Bayala et al 2002;Everson et al 2009), higher relative humidity and lower air temperature compared to monoculture in sub-humid zones (Koech & Whitbread 2006;Schroth, Balle, et al 1995). This resulted in reduced crop yields (McIntyre et al 1997;Everson et al 2009) and increased pest infestation (Koech & Whitbread 2006;Schroth, Balle, et al 1995).…”

Section: Microclimatementioning

confidence: 99%

Trees in agricultural landscapes enhance provision of ecosystem services in Sub-Saharan Africa

Kuyah

Öborn

Jonsson

et al. 2016

International Journal of Biodiversity Science, Ecosystem Servic

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The recent interest in multi-functional agricultural landscapes has not been matched with formal assessment of the roles that trees play across the spectrum of ecosystem services (ESs) provided in Sub-Saharan Africa (SSA). A structured literature review (1995-2014) assessed 350 journal articles about provision of one or more ESs by trees on farms and in agricultural landscapes in SSA. This revealed information on 15 ESs from studies in 23 countries covering arid (1% of studies), semi-arid (49%), sub-humid (26%) and humid (24%) agro-ecological zones. The majority of the studies reported provisioning (39%) and supporting (35%) followed by regulating (26%) ESs while studies on cultural services were scarce. Beneficial impacts of trees were dominating (58%), in particular in semi-arid zones where they were associated with enhancing water and nutrient cycling. A decline in some ESs was reported in 15% of the studies, while 28% found no effect of trees. Although the effects of trees were mainly positive, a decline in crop production was noted as a key trade-off against the provisions of ESs, such as modification of microclimate. This highlights the need to manage trade-offs among impacts of trees on ES provision to reduce competition and increase complementarity between trees and crops.

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“…These shifts in microclimate conditions can lead to expanded growing regions (DaMatta & Ramalho, 2006) and greater resiliency to climate change (Lin et al, 2008). They can also lead to changes in pathogen incidence in the understory plant community (Koech & Whitbread, 2000; Schroth et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Shade tree traits and microclimate modifications: Implications for pathogen management in biodiverse coffee agroforests

et al. 2021

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Diversified agroforestry systems are characterized by the deliberate planting and retention of both native and non-native tree species.This enhanced diversity contributes many important ecosystem features (e.g., habitat; Perfecto et al., 1996) and processes (e.g., nutrient cycling; Isaac & Borden, 2019). However, one often overlooked but important modification in biodiverse agroforests is the modifica-

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Incidence and Severity of Bean Rust (Uromyces appendiculatus) in Alleys between Leucaena Hedgerows in Kenya

Cited by 5 publications

References 10 publications

Microclimate in agrosilvopastoral system enhances powdery mildew severity compared to agropastoral and non-integrated crop

Microclimate in agrosilvopastoral system enhances powdery mildew severity compared to agropastoral and non-integrated crop

Trees in agricultural landscapes enhance provision of ecosystem services in Sub-Saharan Africa

Shade tree traits and microclimate modifications: Implications for pathogen management in biodiverse coffee agroforests

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