Powdery mildew of wheat: Relation of yield components to disease severity

Royse, Daniel J.; Gregory, L; Ayers, J. E.; Cole, H.

doi:10.1080/07060668009501427

Cited by 14 publications

(2 citation statements)

References 10 publications

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“…Moreover, leaves at lower canopy layer senesced and dropped early. Effects of early epidemics on lower leaves were reported by Rouse et al (1980), Kolbe (1982 and by Lim and Gaunt (1986). In legumes, it is not always clear which nodes contnbute most to yield (Wadill et al, 1984;Dehouck, 1991).…”

Section: Canopy Layersmentioning

confidence: 96%

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Habtu

Zadoks

1995

Journal of Phytopathology

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Crop growth and disease epidemics in sprayed and non‐sprayed bean plots, artificially infected with rust (Uromyces appendiculatus) 3 weeks after emergence. were assessed weekly in two cultivars, at two locations for two seasons. Disease intensity was regulated by the application of a fungicide at 5 spray frequencies. Fungicide application influenced leaf area index (LAI) and reduced rust intensity. The fungicide had no significant effect on other diseases and dead leaf area. Fungicide application increased seed yield (SY) by increased numbers of pods per plant (PP). Rust severity was strongly correlated with pustule density but the overall relationships among rust assessment parameters depended on cultivar and location. Seed yield and pods per plant were highly correlated with LAI. The relationships between LAI and seeds per pod or seed weight depended on cultivar and location. Overall rust assessment parameters (rust severity and pustule density) showed close, negative relationships with seed yield. seed weight and pods per plant but not with seeds per pod. The relationships obtained in the partially resistant line 6‐R‐395 were less definite than those in the susceptible line Mexican 142. The yield parameters seed yield and pods per plant, showed strong positive relationships.

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Section: Canopy Layersmentioning

confidence: 96%

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Habtu

Zadoks

1995

Journal of Phytopathology

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“…In many European production systems, either genetic or chemical control of diseases and lodging are used in conjuction with split N applications (Becker and Aufhammer, 1982). Triadimefon [ 1-( 4-chlorophenoxy)-3,3-dimethyl-1-(lH-1,2,4-trizol-1-yl)-2-butanone] applied at GS 7 has been shown to be very effective for controlling powdery mildew on wheat in Pennsylvania (Royse et al, 1980). Our objective in this study was to evaluate the responses of a moderately lodging-resistant wheat variety to high levels of N broadcast in the spring as either split or delayed applications with and without a foliar fungicide.…”

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confidence: 99%

Effects of Timing of Nitrogen Fertilization and a Fungicide on Soft Red Winter Wheat¹

Roth¹,

Marshall

1987

Agronomy Journal

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Split spring N applications and fungicides are important components of proposed intensive management systems for soft red winter wheat (Triticum aestivum L.). Six experiments at two locations were conducted on Hagerstown silt loam (fine, mixed, mesic Typic Hapludalf) soils to evaluate the responses of wheat to a fungicide and delayed or split N applications. Delayed N treatments consisted of a single application of 100 kg ha-• at either growth stage (GS) 5 or 8. Seven split N treatments consisted of two or three applications made at GS 3, 5, or 8, totaling 100 kg N ha-•. Split and delayed N responses were compared to those resulting from four rates of N applied at GS 3. Average grain yields for the experiments ranged from 3.2 to 5.9 Mg ha -•. Yields from split and delayed N were greater than the maximum achieved with GS 3 N applications in only one of the six experiments. In this experiment, the greatest yield increase due to split N, 0.7 Mg ha-•, occurred when a fungicide was used. A large amount of precipitation (219 mm) at that location between GS 3 and GS 5, and a high fertilizer N requirement apparently contributed to the response to split N. Yield responses to fungicides (triadimefon [1-(4-chlorophenoxy)-3,3-dimethyl-1-(1H-1,2,4-trizol-1yl)-2-butanone) or triadimefon + mancozeb [zinc ion and manganese ethylene bisdithiocarbamate)) varied between years and ranged from 0 to 0.9 Mg ha-1 • Decisions to use split Nand fungicides should be based on factors such as disease severity, rainfall, and anticipated soil N supplying capability.--~------------

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Globally Important Wheat Diseases: Status, Challenges, Breeding and Genomic Tools to Enhance Resistance Durability

Bhavani

Singh

Qureshi

et al. 2021

Genomic Designing for Biotic Stress Resistant Cereal Crops

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Powdery mildew of wheat: Relation of yield components to disease severity

Cited by 14 publications

References 10 publications

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Effects of Timing of Nitrogen Fertilization and a Fungicide on Soft Red Winter Wheat¹

Globally Important Wheat Diseases: Status, Challenges, Breeding and Genomic Tools to Enhance Resistance Durability

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Powdery mildew of wheat: Relation of yield components to disease severity

Cited by 14 publications

References 10 publications

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Crop Growth, Disease and Yield Components of Rusted Phaseolus Beans in Ethiopia

Effects of Timing of Nitrogen Fertilization and a Fungicide on Soft Red Winter Wheat1

Globally Important Wheat Diseases: Status, Challenges, Breeding and Genomic Tools to Enhance Resistance Durability

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Effects of Timing of Nitrogen Fertilization and a Fungicide on Soft Red Winter Wheat¹