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Seed germination as influenced by earhead bug and fungal pathogens in sorghum sorghum bicolor



Seed germination as influenced by earhead bug and fungal pathogens in sorghum sorghum bicolor



Seed Research (New Delhi) 19(1): 21-25



The influence of earhead bug [Calocoris] and two major grain molds (Fusarium moniliforme and Curvularia lunata) on seed germination of 14 modern varieties, parental lines and exotic germplasm of sorghum [Sorghum bicolor (L.) Moench] was studied during two kharif seasons. The seeds from the panicles of each genotype were classified into bug damaged and undamaged ones. Grain mold development on these two groups of seeds was further studied in laboratory using the standard blotter method. Germination was severely affected by earhead bug damage, reducing it from 58% to 14%. Fusarium moniliforme and Curvularia lunata were predominant grain molds causing variable degrees of germination loss specific to each genotype. Fusarium moniliforme caused more severe loss in germination. Some lines failed to germinate due to combined effect of earhead bug and Fusarium moniliforme.

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