By J. Kroschel (auth.), Jürgen Kroschel (eds.)
Parasitic weeds of the households Cuscutaceae, Orobanchaceae and Scrophulariaceae are thought of to be one of the significant difficulties dealing with agriculture within the Tropics and Subtropics. within the final many years, huge, immense efforts were made and luck accomplished via scientists world wide in gaining a greater realizing in their biology and ecology in addition to of keep an eye on equipment. notwithstanding, no great relief of infestation has been completed long ago and keep watch over recommendations particular to different parasites, vegetation and farming platforms has to be additional constructed or tailored and realised between a much wider farming inhabitants with compatible extension equipment. This `Technical handbook' offers up to date methodologies for numerous facets of study and extension relating to parasitic weed species of the genera Striga, Alectra, Orobanche and Cuscuta. It has the goal to help scientists and extension employees of overseas and nationwide study and extension institutes and universities, who're both new to the topic or plan to use additional ideas they don't seem to be but commonplace with.
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Extra info for A Technical Manual for Parasitic Weed Research and Extension
Participatory technology development in ecologicall-oriented agriculture: some approaches and tools. ODI Agricultural Administration Unit. K. 1 Reproductive capacity INTRODUCTION Most parasitic weeds produce a large number of seeds per single plant. In context with the requirement for the stimulation of germination this high reproduction forms part of their strategy to survive. Before the last decade, little attention was paid to the reproductive capacity of these weeds, and numerous recent papers refer to non-realistic data on their seed production.
Schmitt U 1981. Untersuchungen zur Verbreitung und Bekampfung von Orobanche crenata Forsk. an Ackerbohnen in Marokko. D. Thesis, University of Bonn, Germany, 194 pp. Wetzel T 1984. Methoden der Schaderreger und Bestandestiberwachung. In: Diagnosemethoden. Springer Verlag, Berlin, Heidelberg, New York, Tokyo, 15-17. Author: J Kroschel Yield loss assessment INTRODUCTION Due to the withdrawal of water, minerals and organic compounds from their hosts, the toxic effect of Striga, parasitic weeds are important biological constraints in agricultural production.
Hermonthica plants in a highly infested sorghum crop may reach a height of 25 em only, whereas they are 60 em high under other conditions; 0. crenata shoots in a lentil crop may have an average size of 20 em, whereas on faba beans the average size can be 45 em). Make clear where the data collected refer to: Species of host crop, growth conditions, infestation level(s), size of field or region, date of collection. If seed capsules are collected note that seed quality varies largely from top to bottom of plant, and that immature capsules have not developed their seed potential, and ensure that capsules are collected before dehiscence.