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 through scientists around the globe in gaining a greater realizing in their biology and ecology in addition to of keep an eye on equipment. in spite of the fact that, no immense relief of infestation has been completed long ago and keep an eye on concepts particular to different parasites, plants and farming platforms needs to be additional built or tailored and realised between a much wider farming inhabitants with appropriate extension tools. This `Technical handbook' presents updated methodologies for numerous points of study and extension with regards to parasitic weed species of the genera Striga, Alectra, Orobanche and Cuscuta. It has the purpose to aid scientists and extension staff of foreign and nationwide study and extension institutes and universities, who're both new to the topic or plan to use additional recommendations they don't seem to be but standard with.
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Additional resources for A Technical Manual for Parasitic Weed Research and Extension
If necessary rephrasing, adding new questions or dropping questions. Several tests might be needed. The length of the interview should not exceed one hour. Translation of the final questionaire into the local language. Random selection of villages and farmers. Data are collected from a relatively large number of farmers which, as a whole, are representative of the respective target group or region in order to achieve quantification, reproducibility and comparability of results. Depending on the number of farmers to be interviewed enumerators will be required with a sound training on survey techniques .
For a series of tests and if no specific testing of exudates is required, standardized stimulants like ethephon or GR24 should be preferred in germination tests. , by heat) before usage to minimise fungal and/or bacterial contamination. LITERATURE Botha PJ 1948. The parasitism of Alectra vogelii, with special reference to the germination of its seed. South African Journal of Botany 14: 63-80. Dawoud DA 1995. Autecological studies on phytoparasites of the genera Alectra, Orobanche and Striga with special reference to their early developmental stages.
Employment of the Global Positioning System (GPS) could largely facilitate the site localisation and its general description. Description of the site: For the description of the sites, all required information could be gathered in a special "multiple choice" form ( ~ annex 11. 7), where the different aspects are provided and one has to choose the ones which apply to the field. Relief: Slope inclination: 0-2°-plain; 2°-5°-slight; 5°-10°-moderate; 10°17 20°-strong; 20°-30° steep; 30°-45°very steep; >45°-extremely steep, slope direction: using compass, altitude: (m above sea level, by altimeter).