Sjemenarstvo, Vol. 22 No. 3-4, 2005.
Original scientific paper
The relationship between aphid (Aphiodidae) attack rate and barley yellow dwarf (BYDV) virus infection rate in Croatia winter small grains
Bogdan Korić
Mladen Šimala
Tatjana Masten
Abstract
In spring of 2002 heavy infection of winter wheat and especially of barley crops with barley yellow dwarf virus (BYDV) was observed. In that year yield losses reaching 30% were established. Own investigations were made by collecting aphids on plant. In the autumn of the same year on 28 locations throughout Croatia, where heavy infections were observed, the survey of aphid species was carried out. On each location a sample of aphids (winged alatae) was taken (altogether 28 samples). The survey was continued in 2003 (27 sampling locations) and 2004 (30 sampling locations). The determination of sampled aphid species was performed by Institute of Zoology of the Faculty of Agriculture of Zagreb University. The analyses of aphid samples have shown that aphids species Rhopalosiphum padi L., Ropalosiphum maidis Fitch. and Sitobion avenae F. have been dominant on all locations. Moderate yellow dwarf virus infections were observed also in spring of 2003, but in 2004 virus infection could not be noticed, according to our finding, prevalent plant hosts of mentioned aphid species in the period from harvest till development of new winter cereal crops in autumn.
Keywords
winter wheat; winter barley; aphids; barley yellow dwarf; BYDV
Hrčak ID:
1882
URI
Publication date:
1.6.2005.
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