The pest Tetranychus urticae infests blackcurrant leaves, causing light puncture marks, a mottled appearance, and subsequent leaf drop. In cases of severe infestation, characteristic fine webbing forms on the underside of leaves and between branches.
In the reference
18
varieties
crop Blackcurrant,
where this is mentioned in the description.
The two-spotted spider mite colonizes the lower surface of blackcurrant leaf blades. As the pest feeds, light spots appear, which gradually merge, leading to yellowing and a bronze discoloration of the leaf. In neglected cases, leaves curl, dry out, and drop prematurely.
Unlike the blackcurrant gall mite, for which resistance genes Ce and P have been identified, no specific dominant resistance genes have been isolated in blackcurrant for spider mite control. Plant resistance to this pest is attributed to the complex adaptive traits of specific cultivars.
General information about the subject — on the page
Spider mite.
Varieties of Blackcurrant mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.