Study of the Allelopathic Potential of Extracts of Azadirachta Indica (Neem)

Allelopathic activity of extracts of Citharexylum spinosum L. from Tunisia

“…Our findings were supported by previous reports that demonstrated the allelopathic effects of many other trees such as Melia azedarach (Hong et al, 2003(Hong et al, , 2004, Azadirachta indica (Neem) (Al-Charchafchi et al, 2007;Ashrafi et al, 2008 ;Abdus Salam and Kato-Noguchi, 2010), Sesbania sesban (Mubarak et al, 2009), Acacia cyanophylla (El Ayeb et al, 2013), and more recently for six tree from South Africa (Sunmonu and Staden, 2014). For C. spinosum, to the best of our knowledge, findings that indicate about its allelopathic effects are not available.…”

“…Roots of the different target species appeared to be more sensitive to C. spinosum extracts than shoots, presumably because of their more ultimate contact with the treated filter paper (Ahn and Chung, 2000). Similar results were reported with other crops by Maharjan et al, 2007, Ashrafi et al (2008 and Wakjira et al, (2009). Abdus Salam andKatoNoguchi (2010) reported that the extracts of allelopathic plants had more inhibitory effect on root growth than on shoot growth because the root is the first organ to absorb allelochemicals from the environment.…”

Plant, Soil and Microbes

“…These species specifi c responses of weed species to truffl e allelochemicals has also been witnessed in other allelopathic fungal and plant species (Berestetskiy 2008 ). The test species' seedlings of these experiments were germinated and grown in an isolated Petri dish free from any form of intra-species resource competition as early seedlings extract their nutrients directly from the seed itself without the necessity of sunlight at this stage (Ashrafi et al 2008 ). It is then deducible that the revealed growth inhibition of the tested species was likely due to an allelopathic reaction and not competitive interference.…”

Identification and bioactivity of the growth inhibitors inTuberspp. methanolic extracts

“…The species specificity of phytotoxin has also been demonstrated for other allelopathic plants and fungi (Berestetskiy 2008). The seedlings of each test species used in these experiments were grown in a single Petri dish without intra-species competition for resources, as young seedlings withdraw nutrients from the seed and light is unnecessary in the developmental stage (Ashrafi et al 2008). Thus, growth inhibitions of the tested plant species are likely to have been caused by the allelopathic reaction rather than by competitive interference.…”