The influence of the apple aphid/spirea aphid complex on intensity of Alternaria blotch of apple and fruit quality characteristics and yield
1995
Filajdic, N. | Sutton, T.B. | Walgenbach, J.F. | Unrath, C.R.
Two levels of aphid densities (apple aphid/spirea aphid complex) were established within treatments of two levels of Alternaria blotch at two locations in 1992 and one in 1993. At the high disease level, disease severity was greater in treatments in which a high aphid density was present. Defoliation was increased at one location in 1 year. Fruit quality characteristics such as soluble solids content, diameter, and weight were often decreased at the high aphid density; firmness was increased and commercial color decreased in some cases. Yield was not affected by aphids.
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