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Effects of straw disposal and tillage on spread of barley yellow dwarf virus in winter barley
Author(s) -
KENDALL D. A.,
CHINN N. E.,
SMITH B. D.,
TIDBOALD C.,
WINSTONE L.,
WESTERN N. M.
Publication year - 1991
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1991.tb04875.x
Subject(s) - biology , barley yellow dwarf , agronomy , straw , plough , aphid , population , tillage , hordeum vulgare , virus , poaceae , plant virus , virology , demography , sociology
Summary The effects of straw baling or incorporation, combined with ploughing, non‐inversion tillage, or direct drilling on the incidence of barley yellow dwarf virus (BYDV), were investigated in plots of winter barley. Virus infection was more prevalent after ploughing (> 40% of the plot area damaged) than after non‐inversion tillage (9 – 24%) or direct drilling (< 3%). For each cultivation method, more infection was associated with straw baling than with straw incorporation. There was a strong negative correlation between plot yields and the incidence of BYDV(r= ‐0.87). Monthly pitfall sampling of non‐specific aphid predators showed that the population activity of several taxa (e.g. Linyphiidae, and the larger species of adult and larval Carabidae and Staphylinidae) declined for a short period in autumn‐winter following cultivation. The overall treatment‐ranking for numbers of predators in autumn (direct drilled > non‐inversion > ploughed) was the opposite of subsequent virus infection. The possible roles of aphid predators and other biological mechanisms in determining the observed effects on BYDV, are briefly discussed.