Herbicides in fenugreek (Trigonella foenum-graecum, L.) with particular reference to diosgenin and protein yields.
1983
Mohamed E.S.
The tolerance of four varieties of fenugreek (Trigonella foenum-graecum L.) to seven pre-emergence and six post-emergence herbicides was tested in the glasshouse and some were studied further in the field. Fenugreek tolerated trifluralin, methazole, chlorthal-dimethyl plus methazole, metamitron, and nitrefen. Entry of herbicides through the root produced a greater response than shoot entry. Laboratory and glasshouse studies of the effect showed there was a negative correlation between activity and soil organic matter content. Trifluralin and isopropalin were effective except with cruciferous weeds which were very resistant. The effect of herbicide safeners, R25788 and M0N4606 as seed treatments, gave good results in pot experiments. They protected fenugreek from up to 5 kg/ha EPTC, but high rates of safeners affected fenugreek growth. Eradicane (EPTC + R25788) as a seed dressing was effective against certain weeds, but it injured the crop. Nodulation of fenugreek was affected only when plant growth was reduced by the herbicides. Abnormally low protein content was associated with high diosgenin yield. EPYC with R25788 or with M0N4606 reduced diosgenin yield, but not protein content. Seed from desiccated plants yielded more diosgenin than from non-desiccated plants.
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