Potato/tomato psyllid
both directly and indirectly, the latter causing the greatest concern and proving difficult to control. In light of this, the export of fruit from susceptible [...] ‘psyllid yellows’, which results in delayed growth, weakness in the new leaves, chlorosis/reddening or purple colouration of the leaf bases and internodes, and [...] chip’ in potatoes Indirect damage causes the most harm, since the consequences are wide-ranging and there are no ‘solutions’ or ‘cures’ for the problems