Association of Phytophthora drechsleri Tucker With Death of Pinus radiata D. Don in Southern New South Wales

Phytophthora drechsleri was found to be abundant in the root zone of declining specimens of 3-year- old Pinus radiata growing in wet conditions at Yass in southern New South Wales. One-month-old and 6-month-old seedlings of P. radiata inoculated with Phytophthova drechsleri under experimental conditions rapidly developed symptoms of disease similar to those observed in the field. Phytophthora drechsleri is suggested as the causal agent of disease in young plants grown on water-gaining sites.