Experimental transmission of Barley yellow dwarf virus by using the vectorRhopalosiphum padi parasitized by Aphidius rhopalosiphi (Hymenoptera : Braconidae)
R. Osler et al., Experimental transmission of Barley yellow dwarf virus by using the vectorRhopalosiphum padi parasitized by Aphidius rhopalosiphi (Hymenoptera : Braconidae), Z PFLANZENK, 106(3), 1999, pp. 291-296
Citations number
17
Categorie Soggetti
Plant Sciences
Journal title
ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION
The influence of the parasite Aphidius rhopalosiphi De Stefani-Perez on the
efficiency of Rhopalosiphum padi L. to transmit the PAV strain of Barley y
ellow dwarf virus (BYDV) was studied, During a 21 h acquisition feeding per
iod on Avena byzantina K. Koch, an equal percentage (80.1 and 81.0 %) of pa
rasitized and non-parasitized aphids became infected. The non-parasitized a
phids survived about three times longer than the parasitized ones (under ou
r trial conditions, the survival of R. padi was not influenced by BYDV). Af
ter a latent period, both the parasitized and non-parasitized aphids remain
ed infectious in average 4.5 and 7.1 days and transmitted BYDV to 2.0 and 3
.3 test plants, respectively. A high number (37 %) of the parasitized aphid
s were able to transmit the virus until to the last day of their life. As a
n epidemiological consequence from the results, we can assume that parasito
ids have more complex effect on BYDV than generally believed. The influence
of parasitism on the spread of both aphids and BYDV in field as well as on
the virus acquisition by the vector will be studied.