EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Epidemiology and yield losses associated with alternaria blight of sunflower helianthus annuus


Phytopathology 75(10): 1151-1156
Epidemiology and yield losses associated with alternaria blight of sunflower helianthus annuus
Epidemics of Alternaria blight, caused by Alternaria helianthi, were initiated at different plant growth stages on two sunflower genotypes (cms HA89 and hybrid 894) during the 1981 and 1982 growing seasons at Brookings, SD [USA]. Yield losses as great as 51 and 60% were observed on hybrid 894 amd cms HA89, respectively, when seed yields were compared to those of check plots sprayed with fungicide. The 100-seed weights and seed oil contents were also significantly reduced in some inoculated treatments. Yield losses, losses in 100-seed weight, and oil content were consistently greater on the inbred line cms HA89 than hybrid 894, indicating that Alternaria could be a greater problem in seed production fields than in commercial hybrid fields. The logistic growth model consistently fit Alternaria blight progress curves better than the Gompertz model in 1981, but in 1982 no consistent difference between the models was detected. Selected critical-point, and multiple-point regression yield loss models gave coefficients of determination of 0.65 and 0.70, respectively, when disease severity was used to predict percent yield reduction due to A. helianthi.


Accession: 005375831



Related references

Effect of Alternaria blight (Alternaria helianthi; Alternaria alternata) on yield of sunflower (Helianthus annuus L.) in India. Helia 21(28): 75-80, 1998

Epidemiology of alternaria blight alternaria helianthi on sunflower helianthus annuus. Summa Phytopathologica 11(3-4): 198-214, 1985

Effect of alternaria helianthi blight on yield components oil content and seed quality of sunflower helianthus annuus. Indian Journal of Agricultural Sciences 50(9): 701-706, 1980

Yield loss attributable to Alternaria blight of sunflower (Helianthus annuus L.) in India and some potentially effective control measures. International Journal of Pest Management 45(1): 15-21, 1999

Epidemiology and yield losses associated with Alternaria blight of sunflower. Phytopathology 75(10): 1151-1156, 1985

Evaluation of fungicides in the control of alternaria blight alternaria helianthi of sunflower helianthus annuus. Summa Phytopathologica2: 3-4, 1985

Integrated management of Alternaria leaf blight of sunflower, Helianthus annuus L. caused by Alternaria helianthi. Journal of Oilseeds Research 21(1): 204-205, 2004

Effect of botanicals and chemicals on the management of blight (Alternaria alternata; Alternaria helianthi) of sunflower (Helianthus annuus). Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz 104(5): 523-527, 1997

Epidemiology of Alternaria spot (Alternaria helianthi (Hansf.) Tubaki & Nishihara) on sunflower (Helianthus annuus L.). Summa Phytopathologica 11(3/4): 198-214, 1985

Identification of sources resistant to Alternaria blight of sunflower (Helianthus annuus L.). Journal of Mycology and Plant Pathology 29(3): 402-407, 1999