The carotene content of alfalfa strains and hybrids with different degrees of resistance to leafhopper injury
1946
Ham, W.E. | Tysdal, H.M.
Carotene content determinations were made on field-grown alfalfa strains and hybrids at different stages of growth with and without leafhopper infestations. New growth was higher in carotene content than more mature growth. After being subjected to leafhopper attack, strains showing least yellowing were higher in carotene content than those which yellowed badly. In general, strains or hybrids having a high leaf percentage were higher in carotene content than those with a lower leaf percentage. On the average, 77% of the carotene content of the plant was found in the leaves. Strains and hybrids differed inherently in their carotene content.
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