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 around the world in gaining a greater realizing in their biology and ecology in addition to of regulate equipment. notwithstanding, no large relief of infestation has been accomplished long ago and keep watch over concepts particular to the several parasites, plants and farming platforms has to be additional constructed or tailored and realised between a much broader farming inhabitants with appropriate extension tools. This `Technical handbook' presents updated methodologies for numerous features of analysis and extension on the topic of parasitic weed species of the genera Striga, Alectra, Orobanche and Cuscuta. It has the goal to aid scientists and extension staff of overseas and nationwide learn and extension institutes and universities, who're both new to the topic or plan to use additional thoughts they don't seem to be but time-honored with.
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Extra resources for A Technical Manual for Parasitic Weed Research and Extension
To overcome dormancy of Cuscuta seed a treatment with concentrated H2S04 for 30 min. is recommended. co- After that time the seeds respond to a stimulant. At lower temperatures, a 37 > 4. It is recommended to store longer preconditioning time Is required. ethephon at soc. 2. Germination stimulants (depending on objectives of the studies): rJF GR24 synthetic germination stimulant. Preparation: Dissolve 10 mg of GR24 in 10 ml of acetone. 3 mM buffer of2-(Nmorpholino) ethanesulfonic acid (= MES) to stabilise the solution.
1 ). In addition, yield assessments have to be carried out in single fields comparing weed-free (non-infected) plant stands with weed-infected ones (Fig. 6). OBJECTIVES • To quantitatively determine yield and regional production losses, • to raise awareness of the severity of a parasitic weed problem. 25 Field surveys Yield assessments Proportion of infested fields =Infestation rate Yield of infected and non-infected plants in different fields and farming systems Proportion of attacked plants per field and region = Infection intensity Estimation of the losses of infected plants =infection-loss relationship I I Regional production losses I Fig.
Distribution and economic importance of 28 Orobanche crenata in faba bean production of Morocco. In: W Bertenbreiter & M Sadiki (1996): Rehabilitation ofFaba Bean. -27. Mai 1995, Rabat/Marokko, 113-120. Kroschel J 1998. Striga - How will it affect African agriculture in the future? - An ecological perspective. ), Agroecology, Plant Protection and the Human Environment: Views and Concepts. PLITS 16(2): 137-158. Kroschel J, B Mossner & J Sauerborn 1996. Estimating maize yield losses caused by Striga asiatica in Malawi.
A Technical Manual for Parasitic Weed Research and Extension by J. Kroschel (auth.), Jürgen Kroschel (eds.)