Effect of different intensities of <i>Alternaria</i> blight on yield and oil content of sunflower

Balasubrahmanyam, N.; Kolte, S. J.

doi:10.1017/s002185960002877x

Cited by 24 publications

(12 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A. helianthi, the leaf, stem and head spotting pathogen, appears to be the most threatening (Sackston, 1978). Alternaria leaf spots have been reported to reduce the seed and oil yield by 27 to 80 percent and 17 to 33 percent respectively (Reddy and Gupta, 1977;Balasubrahmanyam and Kolte, 1980). The damage due to the disease is the number of seed per head, followed by yield.…”

Section: Alternaria Blightmentioning

confidence: 99%

Sunflower disease and insect pests in Pakistan: A review

Mukhtar¹

2010

African Crop Science Journal

View full text Add to dashboard Cite

Sun flower (Helianthus annuus L.) is one of the important oil seed crops and potentially fit in agricultural system and oil production sector of Pakistan. Various diseases, insects and nematodes attack damage the sunflower crop, results a wide range of loss in production and yield. Sunflower is susceptible to diseases of various kinds. The most serious diseases of sunflower are caused by fungi. The major diseases include rust, downy mildew, Verticillium wilt, Sclerotinia stalk and head rot, charcoal rot, blight and leaf spot. The severity of these diseases affects on crop yield. An account of important sunflower pests is discussed for brief understanding low yield of sunflower crop in Pakistan.

show abstract

Section: Alternaria Blightmentioning

confidence: 99%

Sunflower disease and insect pests in Pakistan: A review

Mukhtar¹

2010

African Crop Science Journal

View full text Add to dashboard Cite

show abstract

“…The damages are due to the formation of leaf spots, reduction of plant photosynthetic area and early defoliation (Leite et al, 2006;Alves et al, 2013). Further, the leaf spot or blight significantly reduces head diameters, seed numbers, 1000-seed weight and oil percentage (Balasubrahmanyam and Kolte 1980;Reddy and Gupta 1977). Until now, there is no resistant variety or hybrid available against leaf spot or blight disease, also an efficient disease management system is not available for suppressing the disease during an epidemic.…”

Section: Introductionmentioning

confidence: 99%

Effect of TNAU-Pf1 seed biopriming and foliar spray of newer fungicides on the incidence of leaf blight of sunflower

Rajendran

Gopalakrishnan

Selvakumar

et al. 2017

Journal of Biological Control

View full text Add to dashboard Cite

Seed biopriming followed by foliar spray of different newer fungicide molecules to manage sunflower leaf spot under field conditions have been tried in Coimbatore, Tamil Nadu, India for three consecutive years (2014)(2015)(2016). The result indicated that among the different treatments tested, seed biopriming with TNAU Pseudomonas fluorescens (Pf1) @ 10g/kg seeds followed by spray of Hexaconazole @ 0.1% at 45 days and P. fluorescens (Pf1) @ 1.0% at 60 DAS showed less severity of Alternaria leaf spot (25.7) with the highest yield of 1471kg/ha against the control (47.7) which recorded yield of 1111kg/ha. In addition, seed biopriming promoted higher and uniform seed germination under field conditions.

show abstract

“…The pathogen spreads through plant debris, seed and air and cause severe leaf spot resulting in premature defoliation and stem breakage. Alternaria leaf blight reduces the average flower size, number of seeds per plant, seed yield per plant, seed weight and percentage filling of seed (Balasubramanyam and Kolte 1980). In India up to 90 % yield loss and 34 % oil loss have been documented due to this disease (Udayashankar et al 2012;Balasubramanyam and Kolte 1980).…”

Section: Introductionmentioning

confidence: 99%

“…Alternaria leaf blight reduces the average flower size, number of seeds per plant, seed yield per plant, seed weight and percentage filling of seed (Balasubramanyam and Kolte 1980). In India up to 90 % yield loss and 34 % oil loss have been documented due to this disease (Udayashankar et al 2012;Balasubramanyam and Kolte 1980). In addition, the pathogen was also reported to influence seed germination and seedling vigour drastically (Chander 2003).…”

Section: Introductionmentioning

confidence: 99%

Rapid, specific and sensitive molecular detection assay for Alternaria helianthi that causes leaf blight disease in sunflower

Chavhan¹,

Hinge²,

Chinchole³

et al. 2015

Eur J Plant Pathol

View full text Add to dashboard Cite

The leaf blight disease of sunflower (Helianthus annuus) caused by Alternaria helianthi is a serious threat to its cultivation worldwide. Early and accurate detection of the pathogen is critical to efficient disease management and in avoiding further losses due to epidemics in sunflower. Conventional methods of detection and identification are time consuming, labour intensive, and lack specificity and sensitivity. A realtime PCR based TaqMan® probe assay was developed to target 156 bp Internal Transcribed Spacer (ITS) region of A. helianthi for its detection using fungal genomic DNA and infected plant tissues and seeds of sunflower. The specificity of the probe and primers was confirmed by testing their cross reactivity using genomic DNA of closely related Alternaria species isolated from 17 crop plants and 15 fungal species of other genera. No cross-reactivity could be detected with any of the other non-target fungal strains used in this study. The assay successfully detected as low as 1.0 pg fungal genomic DNA and up to 1 % infection in sunflower seed lots. To the best of our knowledge, this is the only probe based real-time PCR assay that enable high specificity and sensitivity for rapid detection of A. helianthi in infected seeds and plant tissues. The assay may also hold promise for application in effective bio-threat and risk mitigation program by early and accurate detection of the pathogen for effective management.

show abstract

Effect of different intensities of Alternaria blight on yield and oil content of sunflower

Cited by 24 publications

References 1 publication

Sunflower disease and insect pests in Pakistan: A review

Sunflower disease and insect pests in Pakistan: A review

Effect of TNAU-Pf1 seed biopriming and foliar spray of newer fungicides on the incidence of leaf blight of sunflower

Rapid, specific and sensitive molecular detection assay for Alternaria helianthi that causes leaf blight disease in sunflower

Contact Info

Product

Resources

About