Response of Zea mays L. to cogermination and aqueous extracts of Datura inoxia Mill.
The present study was undertaken to assess the allelopathic effect of Datura inoxia Mill. in relation to the germination and initial growth of Zea mays L. Cogermination of maize with D. inoxia seeds and aqueous extracts from fresh and dry D. inoxia biomass in concentrations of 7.5%, 10% and 20% were examined under laboratory conditions using Petri dishes. The results showed that seeds cogermination had not significant effect on maize germination, but had significant effects on seedlings growth. Inhibition of root length of maize seedlings was of 61.9% and inhibition of shoot length was of 40.0%. The aqueous extracts of D. inoxia showed significantly deterioration in germination and seedlings growth of maize. The inhibitory effects of the extracts on germination ranged from 23.2% to 57.1%, on root length - from 19.8% to 92.6%, and on shoot length - from 33.2% to 69.6%. In conclusion, since this weed had strong allelopathic potential which suppressed germination and initial growth of maize. Moreover, there is an urgent need of integrated D. inoxia management strategy to stop further spread of this alien weed into cultivable areas.