Physiological Specialization Of Striga Hermonthica And Crop Specificity

Ramaiah, K V (1984) Physiological Specialization Of Striga Hermonthica And Crop Specificity. In: Proceedings of the third international symposium on parasitic weeds, 1984, ICARDA, Aleppo, Syria.

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Six samples of Strlga hermcnthica (Del.) Benth. from sorghum and eight from millet (Pennisetum anlerlcanuls (L.) K. Schum) were tested against two susceptible cultivars each cf sorghum and millet in 1981 and 1982 pot exparlments to present evldence for crc'p specificity. The Striga seed samples were collected from latitudes renging from 10°42'N to 13O29'N ariS ~~IiY€pSie Sti2ta ~~arro&rr ~&7k;!..:,: di~tribdtior,o f Stri~a-h -e rrcz?k!ce<. The results indicate that sorghun cultivars were able t,o germinate and support Striga from both sorghum and nlllet hosts whereas millets could orily support Striga from millet. However, ~n certain regions both the crops were attacked by both types of Striga. Extreme host specificity was not exhibited by the Striga samples Included in the present investigation. They represent intermediate forms which were able to attack sorghum more than 11,~:1esti nce sorghum is more exter~slvelyg rown in the region under study. In areas where millet Strlpa :aqjles were collected they attackfd mlilet but also retained the capsc:ty to attack sorghums. It is sugyrst~r: tt,;>t speclallzatlon is the outcorte of the Intensity with which a particular i'ost crop is grown at the exclusion of the other thus creating a r3L;roduct ~veis olation between so:gii~l...s qd ~IllIet Strlg? strains.

Item Type: Conference or Workshop Item (Paper)
Subjects: Others > Agriculture-Farming, Production, Technology, Economics
Depositing User: Library ICRISAT
Date Deposited: 13 Dec 2011 13:51
Last Modified: 13 Dec 2011 13:51
Acknowledgement: UNSPECIFIED
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