A new species of Gymnanthemum (Compositae, Vernonieae) from South Africa is described. It can be distinguished from other species in the genus by the five-flowered capitula and widely obtuse leaf blades.

Classical biological control of invasive plants depends on the introduction host-specific natural enemies. Many enemies have provided successful control, but impacts herbivorous insects their hosts are highly variable and context dependent. Under some circumstances, overcompensation can even occur, with plant reproduction temporarily increasing rather than decreasing in response to herbivory. T...

Note: Contribution to ‘Augustine and Manichaean Christianity’, the First South African Symposium on Augustine of Hippo, University of Pretoria, 24−26 April 2012. Dr Jacob van den Berg is participating as research fellow of Prof. Dr Hans van Oort, Professor Extraordinarius in the Department of Church History and Polity of the Faculty of Theology at the University of Pretoria, Pretoria, South Afr...

in order to investigate lentil response to application times and amounts of zinc, an experiment was arranged as factorial based on randomized complete block design with four replications on farm research of gonbad higher education center during 2008-2009. treatments were application times (before flowering and beginning of pod setting) and application rates (0, 0.5, 1, 1.5 and 2 liter per hecta...

five genotypes of chickpea as a half diallel crossed with each other, in 2008, 5 parents and 10 progenies were planted as randomized complete block design and some traits including days to podding, basal pod height, number of pods per plant, number of double seed pods per plant, number of single seed pods per plant, number of empty pods per plant, seeds per plant and seed yield per plant were e...

in order to study individual and integrated effects of biological, organic and chemical fertilizers on milk thistle (silybum marianum l.) quantitative and qualitative traits, a field experiment was conducted at research station, faculty of agriculture, ferdowsi university of mashhad, iran during growing season of 2010-2011. a complete randomized block design with twelve treatments and three rep...

drought stress is one of the important problems in arid and semi_arid regions. drought stress take place in plants when available water is lesser than evapotranspiration. in order to evaluate the effect of drought stress on morphological traits and yield of three medicinal plants an experiment was carried out during the 2010 year in research greenhouse of faculity of agriculture, ferdowsi unive...