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Paper presents the main problems of eriophyoid mites as the vectors of virus diseases of cereals and other grasses. The most important viruses and their vectors are: wheat streak mosaic virus (WSMV) transmitted by Aceria tosichella Keifer, ryegrass mosaic virus (RMV) and agropyron mosaic virus (AMV), transmitted by Abacarus hystrix (Nalepa). Both species are very numerous and frequent in Poland. A...
400 samples of natural winter debris collected from bee hives, 150 samples of stored honey and 100 samples of pollen collected by bees were examined; full of food and empty honey combs, brood and adult bees were also observed. 100% of samples of debris, 90% of pollen and almost 24% of honey samples contained mites; they were found also on honey combs and on died and living bees (brood, imagines)....
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