Rice bacterial leaf blight: field experiments, systems analysis and damage coefficients

Elings, A.; Reddy, P. R.; Marimuthu, T.; Rossing, W.A.H.; Jansen, M.J.W.; Teng, P. S.

doi:10.1016/s0378-4290(96)01036-2

Cited by 13 publications

(8 citation statements)

References 13 publications

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“…Elings et al. () also observed the decreased rice net photosynthetic rate caused by BLB. Shen, Xu, Hong, Wang, and Ye () reported that Cuscuta campestris infection reduced LSP, P max , Φ and CE and increased LCP of Mikania micrantha leaves.…”

Section: Discussionmentioning

confidence: 87%

Influence of bacterial leaf blight on the photosynthetic characteristics of resistant and susceptible rice

Sheng

Zhang

et al. 2018

Journal of Phytopathology

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The effect of crop disease on photosynthetic characteristics is important for disease control. Two varieties, Shenzhou 98 and Neiwuyou 8015 with resistance and susceptibility to bacterial leaf blight (BLB), respectively, were selected, and the responses of the net photosynthetic rate (PN) to active photon flux density (PPFD) and intercellular carbon dioxide concentration (Ci), as well as chlorophyll fluorescence, pigments and stomatal resistance (SR), were measured. The results showed that BLB infection greatly decreased the maximum photosynthetic rate (Pmax), light saturation point (LSP), carboxylation efficiency (CE), maximal fluorescence (Fm) and actual photochemical efficiency of PSII (ΦPSII) but increased the light compensation point (LCP) and dark respiratory rate (RD), which suggested that the performance of rice photosynthesis was decreased by BLB infection. The BLB infection had a lower effect on resistant rice Shenzhou 98 than on susceptible rice Neiwuyou 8015. The reduction of pigment and increased SR caused by BLB infection may have resulted in the decline in the photosynthetic rate. Significant effects of the BLB infection were observed on chlorophyll fluorescence Fm and ΦPSII in resistant and susceptible rice. These parameters may be useful for noninvasive monitoring of plant disease considering the negative effect caused by other stresses.

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Section: Discussionmentioning

confidence: 87%

Influence of bacterial leaf blight on the photosynthetic characteristics of resistant and susceptible rice

Sheng

Zhang

et al. 2018

Journal of Phytopathology

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“…The BLB is a major vascular disease of irrigated rice and may cause up to 50% reduction in yield where there are serious infestations (Elings et al 1997). An infected leaf has yellow watersoaked lesions at the margin of the leaf blade.…”

Section: Resultsmentioning

confidence: 99%

Assessment of the severity of bacterial leaf blight in rice using canopy hyperspectral reflectance

Yang

2009

Precision Agric

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Bacterial leaf blight (BLB) is an important vascular disease of irrigated rice and serious infestations may cause a significant loss of yield. This study analyzed hyperspectral canopy reflectance spectra of two rice cultivars with different susceptibilities to BLB to establish spectral models for assessing disease severity for future site-specific management. The results indicated that wavebands from 757 to 1039 nm were the most sensitive region of the spectrum for the moderately susceptible cultivar TNG 67, whereas most narrow bands showed a significant relationship for the highly susceptible cultivar TCS 10. All the spectral indices (SIs) calculated had significant relationships with proportions of infested area in cultivar TCS 10, but only two SIs correlated significantly with cultivar TNG 67. The relation between the severity of the disease and spectral reflectance for the less susceptible cultivar TNG 67 can be improved by using a multiple linear regression approach.

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“…Abundant nitrogen fertilization may exacerbate bacterial blight of rice (Oryza sativa), caused by X. oryzae pv. oryzae, and reduce grain yields (2,5), but high levels of nitrogen impeded invasion of cabbage (Brassica oleracea) leaves by X. campestris pv. campestris (10).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

“…The importance of cultural practices, such as rate of nitrogen fertilization, for management of Xanthomonas leaf blight is largely unknown. In other plant diseases caused by xanthomonads, nitrogen fertilization may increase or decrease disease severity (2,5,10,11). However, observations from experimental field plots and natural epidemics of Xanthomonas leaf blight in Colorado suggest nitrogen deficiency may reduce disease severity (Gent and Schwartz, unpublished data).…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen Fertilization and Seed Contamination on Epiphytic Populations of Xanthomonas axonopodis pv. allii and Development of Xanthomonas Leaf Blight of Onion

Gent

Schwartz

2005

Plant Health Progress

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Xanthomonas leaf blight of onion, caused by Xanthomonas axonopodis pv. allii, is a yield-limiting disease in Colorado, for which few effective management strategies are available. The effects of rates of nitrogen fertilization and levels of seed contamination by X. axonopodis pv. allii on epiphytic populations of the pathogen and subsequent disease development were determined in field studies over two years. Epiphytic populations of a rifampicin-resistant mutant were quantified from bulked, asymptomatic leaf tissue using a leaf wash assay. There was no significant relationship between nitrogen fertilization treatment and epiphytic population development, but excessive nitrogen (> 200 kg/ha) fertilization increased disease severity 27 to 50% compared with non-fertilized and low (112 kg/ha) nitrogen fertilizer treatments in 2004. Seed inoculated with various levels of X. axonopodis pv. allii did not result in persistent epiphytic populations of the bacterium or development of symptoms, even at 107 CFU/g of seed. The results of these studies suggest moderate rates of nitrogen fertilization may reduce severity of Xanthomonas leaf blight compared to higher rates, and that seed contamination by X. axonopodis pv. allii may be of limited importance for disease development under the semi-arid conditions of furrow-irrigated onion production in Colorado. Accepted for publication 13 March 2005. Published 31 March 2005.

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Rice bacterial leaf blight: field experiments, systems analysis and damage coefficients

Cited by 13 publications

References 13 publications

Influence of bacterial leaf blight on the photosynthetic characteristics of resistant and susceptible rice

Influence of bacterial leaf blight on the photosynthetic characteristics of resistant and susceptible rice

Assessment of the severity of bacterial leaf blight in rice using canopy hyperspectral reflectance

Effect of Nitrogen Fertilization and Seed Contamination on Epiphytic Populations of Xanthomonas axonopodis pv. allii and Development of Xanthomonas Leaf Blight of Onion

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