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Dec 18, 2019 · Key gaps include understanding the true value of plants and trees to society; the impacts of multiple pests and diseases on individual plant species and the wider environment; and providing evidence for improved methods of prevention, detection, and control of pests and diseases.
- Nicola Spence, Louise Hill, Jake Morris
- 27
- 2020
- 18 December 2019
Plant diseases are a common occurrence for most. Learn how to deal with the most common plant ailments and how to keep them from ruining your garden.
- Overview
- Nature and importance of plant diseases
plant disease, an impairment of the normal state of a plant that interrupts or modifies its vital functions. All species of plants, wild and cultivated alike, are subject to disease. Although each species is susceptible to characteristic diseases, these are, in each case, relatively few in number. The occurrence and prevalence of plant diseases var...
Plant diseases are known from times preceding the earliest writings. Fossil evidence indicates that plants were affected by disease 250 million years ago. The Bible and other early writings mention diseases, such as rusts, mildews, and blights, that have caused famine and other drastic changes in the economy of nations since the dawn of recorded history. Other plant disease outbreaks with similar far-reaching effects in more recent times include late blight of potato in Ireland (1845–60); powdery and downy mildews of grape in France (1851 and 1878); coffee rust in Ceylon (now Sri Lanka; starting in the 1870s); Fusarium wilts of cotton and flax; southern bacterial wilt of tobacco (early 1900s); Sigatoka leaf spot and Panama disease of banana in Central America (1900–65); black stem rust of wheat (1916, 1935, 1953–54); southern corn leaf blight (1970) in the United States; Panama disease of banana in Asia, Australia, and Africa (1990 to present); and coffee rust in Central and South America (1960, 2012 to present). Such losses from plant diseases can have a significant economic impact, causing a reduction in income for crop producers and distributors and higher prices for consumers.
Loss of crops from plant diseases may also result in hunger and starvation, especially in less-developed countries where access to disease-control methods is limited and annual losses of 30 to 50 percent are not uncommon for major crops. In some years, losses are much greater, producing catastrophic results for those who depend on the crop for food. Major disease outbreaks among food crops have led to famines and mass migrations throughout history. The devastating outbreak of late blight of potato (caused by the water mold Phytophthora infestans) that began in Europe in 1845 brought about the Great Famine that caused starvation, death, and mass migration of the Irish. Of Ireland’s population of more than eight million, approximately one million (about 12.5 percent) died of starvation or famine-related illness, and 1.5 million (almost 19 percent) emigrated, mostly to the United States, as refugees from the destructive blight. This water mold thus had a tremendous influence on economic, political, and cultural development in Europe and the United States. During World War I, late blight damage to the potato crop in Germany may have helped end the war.
May 25, 2020 · Infections affect plants at different stages of agricultural production. Depending on weather conditions and the phytosanitary condition of crops, the prevalence of diseases can reach 70–80% of the total plant population, and the yield can decrease in some cases down to 80–98%.
- Pavel A. Nazarov, Dmitry N. Baleev, Maria I. Ivanova, Luybov M. Sokolova, Marina V. Karakozova
- 10.32607/actanaturae.11026
- 2020
- Acta Naturae. 2020 Jul-Sep; 12(3): 46-59.
Sep 26, 2020 · By familiarising yourself with the signs and symptoms, you can help prevent the introduction and spread of damaging pests and diseases. We take a look at the top pests and diseases threatening...
Sep 23, 2015 · Despite the pertinence of understanding the impact of pathogens on plant diversity at all levels of biological organization, studies of natural systems are rare and there has been a lack of experimental tests of mechanisms of pathogen‐induced changes to diversity.
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Jun 6, 2021 · Research programs focused on disease surveillance and epidemiology for the high-impact plant pathogens on major food crops such as wheat, potato, cassava, banana, corn, and rice are needed to prevent plant pathogen spread and predict the global burden of plant disease.
