Apricot root rot, Armillariella mellea (Vahl.) Karst.
The effects of A. mellea infection of apricot roots include a sudden wilt of aerial parts. The infection process is described and the importance of subterranean rhizomorphs in the disease cycle emphasized. Conditions favourable and unfavourable to the disease are outlined and it was shown that the presence of woody remains in the soil is the most important factor in the spread of the disease. Control methods are primarily preventative and include the use of tolerant rootstocks, destruction of potential nutrient sources and soil disinfection by fumigation.