By R. A. Lass, L. H. Purdy (auth.), S. A. Rudgard, A. C. Maddison, T. Andebrhan (eds.)

The Monograph offers with the belief, making plans, implementation, effects and conclusions of the foreign Witches' Broom undertaking (IWBP), which was once organize in 1985 with the purpose of manufacturing an fiscal administration approach for witches' broom sickness of cocoa. The contributions of a number of the sponsors, and the jobs performed by way of the engaging corporations and scientists are defined within the introductory bankruptcy. bankruptcy 2 presents a evaluate of what used to be, and what used to be now not recognized from released literature in regards to the cocoa­ witches' broom pathosystem in 1989. The scope of the venture and the techniques used are coated in bankruptcy three, whereas Chapters four to thirteen file at the box experiences themselves intimately. the new visual appeal of witches' broom within the very important cocoa zone of Bahia in Brazil is defined in bankruptcy 14, ahead of ailment administration options are summarised and destiny clients thought of within the last chapters. the numerous man-years of box study within the IWBP in a complete of six international locations generated a lot worthwhile info which used to be analyzed either within the person international locations and jointly. inspite of a record of this measurement, sure info and analyses with much less direct relevance to disorder administration needed to be passed over. it's anticipated that extra specified remedies of sure features will emerge in medical papers, and additional analyses might be undertaken.

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Extra resources for Disease Management in Cocoa: Comparative epidemiology of witches’ broom

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These same objects in Set 2 did produce some basidiocarps, but were active for less than 4 weeks. Flushing and vegetative infection There were 6 shoot flushes in year 1 at intervals of between 4 and 14 weeks. 4). Other flushes were recorded in weeks 44-48 of 1986, and weeks 4, 16 and 30 of 1987. 5), with intervals of 6-22 weeks. The flushes in week 40, 1987 and week 1, 1988 represented 40% of the total number of active points recorded in year 2. Production of basidiocarps on the sets in year 1 was concentrated into weeks 6-18 of 1986, and only one main shoot flush in week 16 was exposed to infection.

Maddison & RA Schmidt METHODS FOR COMPARATIVE EPIDEMIOLOGY EXPERIMENT Establishment of Research Sites A protocol was established for the installation of research sites and recording of data, so that results from different sites would be comparable. Initially eight sites (three in Brazil, two in Colombia, two in Ecuador, and one in Trinidad) were planned to start in the first dry season at each location after July 1985. Two more sites (one in Grenada, and one in Venezuela) were added one year later.

The first two are in the state of Para in the lower Amazon Basin, 500 km and 200 km from the sea respectively. The terrain is flat to slightly undulating. Duro Preto is on the southern edge of the Amazon Basin about 1,000 km south of Manaus in Rondonia state, where the terrain consists of low hills. One of the Colombian sites was located near Manizales in the montane valley of the river Chinchina, and was the highest of all at approximately 1,000 m above sea level. The other was installed on the Llanos plains east of the Andes and close to Villavicencio, in flat terrain close to a river (Ari-Ari).

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