Location: Fruit and Nut Research
2012 Annual Report
The development of new rootstocks and management practices for the control of soil borne diseases and nematodes of peach is an urgent need of the southeastern US peach industry. This has become even more apparent with the introduction of ‘Guardian’ peach rootstock in 1993. ‘Guardian’ has been widely adopted by the southeastern US peach industry and though it has provided exceptional resistance to peach tree short life (PTSL), it is highly susceptible to Armillaria root rot (ARR) which has now surpassed PTSL as the primary cause of premature peach tree death. The first group of plum hybrid and plum x peach hybrid rootstock selections bred in this program have completed their disease resistance and horticultural evaluations. The first release from this group, MP-29, has moved into commercial production. MP-29 offers excellent resistance to both PTSL and ARR. The first finished trees budded onto MP-29 will be delivered to growers this fall. Evaluations are continuing and the scaling up of materials to support additional release(s) is progressing.