Pyrethrum Breeding

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Date
1940
Authors
Thorpes H.C
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Abstract
Once free-flowering lines of high toxicity have been isolated, they can be multiplied by root division and issued to farmers for planting. As previously stated, such material will be available in limited quantities in 1940. In Kenya, pyrethrum is. like other species of Chrysanthemum, self-sterile, and it will be necessary on this account to plant more than one line in order to obtain the mixed population that is necessary to ensure adequate fertilization and subsequent development of the achenes or fruits in which the pyrethrins are situated. This has been amply emphasized by Beckley (938), and a further warning is given here. The planting up of mixed splits will, however, present no serious practical problem.
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East African Agricultural And Forestry Journal, V (6), p. 479-480
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