Root-knot nematode, Meloidogyne incognita, is the major limiting factor in tomato production in many regions of the world including Ethiopia. For its management, different plant species (botanicals) are being tried in different forms as an alternative to nematicides. The nematicidal potential of baker tree (Milletiaferruginea), bitter leaf (Vernonia amygodalina), parthenium (Parthenium hysterop...

To understand germination timing in an ecological context, the response to environmental events that affect seed dormancy is central, and has to be combined with knowledge of germination responses to different circumstances. In this study, seed dormancy, germination, and emergence phenology of six annual co-occurring weedy Asteraceae species were investigated. Three pre-treatments (warm and col...

Several potential cover crops were evaluated for their susceptibility to Meloidogyne arenaria race 1, M. incognita race 1, and M. javanica in a series of five greenhouse experiments. No galls or egg masses were observed on roots of castor (Ricinus communis), cowpea (Vigna unguiculata cv. Iron Clay), crotalaria (Crotalaria spectabilis), or American jointvetch (Aeschynomene americana). Occasional...

Hypochlorite is a strong oxidant able to induce deleterious effects in biological systems. The goal of this work was to investigate the use of PGR and PYR as probes in assays aimed at evaluating antioxidant activities towards hypochorite and apply it to plant extracts employed in Chilean folk medicine. The consumption of PGR and PYR was evaluated from the decrease in the visible absorbance and ...

Nitrogen is a major plant macronutrient and its supply affects the entire metabolism of plants. This study evaluated effect different nitrogen concentrations in nutrient solution: 0, 4.2, 8.4, 12.6 mg L?1 Mexican marigold (Tagetes erecta L.) var. Inca plants an open soilless culture system under greenhouse conditions on concentration chlorophylls, carotenoids, phenolics, flavonoids derived from...

The main effects and interactions of four different mineral N levels (0, 50, 100 and 150kg fed -1 ) and four various poultry manure rates (0, 10, 15 and 20m 3 fed -1 ) on the vegetative growth, flowering, volatile oil content and chemical composition of marigold plants (Tagetes minuta) were investigated through two field experiments in 2000/2001 and 2001/2002. The obtained results, obviously, s...