Project Number: 6606-22000-014-00
Project Type: Appropriated

Start Date: Apr 04, 2012
End Date: Apr 03, 2017

Objective:
1. Develop improved nematode management strategies based on cultural, biocontrol, and chemical pesticide approaches for suppression of ring and/or root-knot nematodes and related peach and pecan disease complexes, such as Peach Tree Decline and Pecan Replant Disease. 2. Elucidate the interactive effects among key nematode pests and pathogenic fungi, and rootstock genotype to improve understanding of host susceptibility to peach tree decline problems, such as Peach Tree Decline Disease.

Approach:
Evaluate cover crop systems for nematode suppression and mode of action identified; investigate efficacy of a new postplant nematicide and lower rates of Telone with selected rootstocks; evaluate Pasteuria penetrans as a biocontrol agent for pecan root-knot nematode; develop new knowledge regarding interactive effects among nematode pests and pathogenic fungi as correlated with peach replant disease; and evaluate advanced Prunus germplasm for resistance to continuous root-knot and ring nematode pressure under field conditions. Resources will support research already taking place on this research project. This includes development of strategies or approaches to minimize the economic impact of nematodes and other pathogens on peach and pecan. Work involves ground covers, new postplant nematicide, alternatives to chemical nematicides, lower rates of Telone II nematicide, and biological agent to reduce nematode populations in soils.