Chromolaena odorata is an aggressive weed that adversely affects cereal crops and grazing lands in Serengeti-Tanzania. This study investigated allelopathic. Allelopathic Effects of Chromolaena odorata (L.) King & Robinson on Seed Germination and Seedlings Growth of Paddy and Barnyard Grass. Fulltext – Effect of Chromolaena odorata on the Growth and Biomass Allelopathy is defined as the direct or indirect harmful or beneficial effect of one plant on.

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Shoot number per cotyledon node explant and total shoot number per petri dish were obtained the highest as 2. Nutrient ratios of carbon, nitrogen, phosphorus, and sulfur in seed were slightly better predictors of oil chrmolaena and oil yield than those in soil. The effects of alang-alang Imperata Cylingrica L. Research Journal of Environmental Sciences, 5: Table of Contents 8 7 Effect of fresh shoot aqueous extract FSE of Chromolaena odorata on the fresh weight of root and shoot of Celosia argentea The shoot height and root length of seedlings treated with aqueous extract and those of the control were not statistically different Table 13.

Crop Protection 20— Potential allelopathic quaianolides from cultiver sunflower leaves var. Effects of aqueous extract of Effecr odorata odoratta the root length of Celosia argentea Table 4: At 4 and 6 WAP for seedlings and 8 and 10 WAP for weed seedling, samples were randomly harvested, dried and weighed to determine dry matter content.

Thesis, University of Ibadan. Chromolaena odorata is a member of the family Asteraceae. An organic biofertilizer NPKB was produced from earthworm compound enriched in N by inoculation with free living bacteria, effective in nitrogen fixation.

If solution ml was aklelopathic to treated pots, while distilled water was used as control. Four statistical techniques consisted of canonical correlation CCprincipal component analysis PCcluster analysis, and stepwise regression were undertaken for exploring the relationships.

July | Australian Journal of Crop Science

However, the result agreed with the study of Hussain et al. Alabi 1 and O.


The plant has been shown to enhance the buildup of organic matter in fallow system in tropical soil Agbim, ; Obatolu and Agboola, Effect of three weed residues on weed and crop growth. The ground plant was soaked in 1 L of water for 12 h. Allelopathy in the search for natural herbicide model. The effect of Nitrogen deficiency on the concentration of caffeoqunic acids and scopolin in tobacco. For pod diameter and seed length, epistasis could not be detected by both the tests, and in the expression of these two traits additive gene action was very important.

Proceedings of the 4th World Congress on Allelopathy. These showed that the aqueous extract of Chromolaena odorata enhanced these growth parameters of Celosia argentea. Data on weeds could not be taken at this period because weed growth was slow. Soybean plant height and number of leaves were not affected by siam weed extract Tables 2 and 3. Volume 8 Issue 7 July issue.

Sunflowers Helanthus annus are allelopathic to weeds. Factors affecting effectiveness of allelochemicals.

Journal of Applied Sciences and Environmental Management

The fresh and dry weight of the root of the seedlings in the aqueous extract treatment regime were not significantly different from those of the seedlings in the control regime Table 45.

Various biological, chemical and physical components may be responsible. The seed response to storage varied with time, packaging material, and temperature. The polynomial, Page and sigmoid models exhibited a good fit to the experimental points obtained while freeze-drying. The data on parents, F 1 s and three-way crosses were collected for 10 physical-quality traits of pods and kernels following standard procedures, and analysed to detect epistasis.

The root system was carefully excavated. Root length, shoot length, leaf area, fresh and dry weight of root and shoot were determined. Observations reveal that in areas where siam weed grows, growth of other plants is always hampered Akobundu The starch conversion to soluble sugars in the pulp was affected by impact damage. The shoot height and root length of seedlings treated with aqueous extract and those of the control were not statistically different Table 13.


Once entered into the soil, the bioactive concentration of allelochemicals is determined through the sorption, fixation, leaching and chemical and microbial degradation Blum, Results showed that the effect of year and cultivars’ emergence time were not significant, but the effect of sowing date was significant.

Results showed that the shoot height, leaf area, fresh and dry weight were enhanced by the application of aqueous extract prepared from the fresh shoot of Chromolaena odorata. Seedlings were thinned to 4 plants per pot 3 weeks after planting WAP. Lawal 2B.

Ife brown and soybean var. How to cite this article: Review article Breeding improvements in safflower Carthamus tinctorius L.

According to the results, it could be concluded that encouraging explants for spacing competition by decreasing the culture distances among them from ‘2. Inter-allelic interactions in the inheritance of physical-quality traits in peanut Arachis hypogaea L. The allelopathic potential of Chromolaena odorata on seed germination and seedling growth of vigina unguiculata var.

Assessment of Allelopathic potential of barnyard grass Echinochloa crus-galli on rice oryza sativa L. Spatially demarcated 36 grids within soil series accounted for more variation in crop performance and reacted more significantly to temporal variation than soil series.

The root length of the plants in the control regime was longer than that of the plants in the aqueous extract treatments regime at the later part of the experiment Table 3. The root was then washed free of soil and chromllaena measured at a distance between the base of plant and root tip.

Also, Daizy et al.