Comparative study of inhibitory effect of wild sunflower (Tithonia diversifolia (Herm SL.) Gray) and common sunflower (Helianthus annuus L.) on rice and Echinochloa colona (L.) Link
1993
Abeysekera, M.M.A.S.K. | Robles, R.P. (Philippines Univ., Los Banos, College, Laguna (Philippines))
Inhibiting effects of wild sunflower (Tithonia diversifolia (Herm SL) Gray) and common sunflower (Helianthus annuus L.) are well documented. The comparative effect on rice and Echinochloa colona L. however have not been reported. This study was conducted to compare such inhibition. Fresh plant parts of wild sunflower and common sunflower were incorporated in soils into which rice and E. colona seeds were sown. Residues of both wild sunflower and common sunflower significantly inhibited the emergence and further growth of E. colona but not that of rice. No significant differences however were observed on the inhibitory effect of wild sunflower and common sunflower on E. colona. Rice grown in such residues increased in tiller number, leaf area and biomass production
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