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Wheat diseasesAdditional recommended knowledge
In EuropeCereals are at risk from numerous diseases due to the level of intensification necessary for profitable production since the 1970s. More recently varietal diversification, good plant breeding and the availability of effective fungicides have played a prominent part in cereal disease control. Use of break crops and good rotations are also good cultural control measures. The demise of UK straw burning in the 1980s also increased the importance of good disease control. Active control measures include use of chemical seed treatments for seed-borne diseases and chemical spray applications for leaf and ear diseases. Development of resistance by diseases to established chemicals has been a problem during the previous 30 years. FungicidesSome cereal fungicide groups and examples of active ingredients:
Principal diseases
ReferencesCereal Pests and Diseases (Gair, Jenkins, Lester) 1987 Farming Press ISBN 0-85236-164-5 In the USAWheat is subject to more diseases than other grains, and, in some seasons, especially in wet ones, heavier losses are sustained from those diseases than are in other cereal crops. Wheat may suffer from the attack of insects at the root; from blight, which primarily affects the leaf or straw, and ultimately deprives the grain of sufficient nourishment; from mildew on the ear; and from gum of different shades, which lodges on the chaff or cups in which the grain is deposited. Examples of wheat diseases:Bacterial diseases
Fungal diseases
Nematodes, parasitic
Viral diseases and viruslike agents
Phytoplasmal diseases
Link between air pollution and septoria blotchA team of researchers examined a library of British wheat samples dating back to 1843. For each year, they determined the levels of Phaeosphaeria nodorum and Mycospharella graminicola DNA in the samples. After accounting for influences such as growing and harvesting methods and weather conditions, they compared the DNA data with estimates of emissions of air pollutants. The effect of sulfur dioxide correlated with the abundance of the two fungi. P. nodrum grew more successful with the dawn of the Industrial Revolution. M. graminicola was more abundant before 1870 and since the 1970s. The success since the 1970s may be linked to reductions in sulfur dioxide emissions due to environmental regulations. (Bearchell, et al., 2005) References
See also
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Wheat_diseases". A list of authors is available in Wikipedia. |