Location: Fruit and Tree Nut Research
Project Number: 6042-22000-022-00-D
Project Type: In-House Appropriated
Start Date: Oct 1, 2010
End Date: Sep 30, 2015
1. Develop alternative control strategies for the pecan weevil: (1.1) Determine the efficacy of biocontrol agents such as entomopathogenic nematodes (Steinernema and Heterorhabditis spp.) and entomopathogenic fungi (Hypocreales), and (1.2) investigate the basic biology and ecology of these agents to enhance efficacy. (1.3) Investigate improved methods of production, formulation, and delivery of these biological control agents, and integrate optimum biocontrol tactics with other management strategies. 2: Develop alternative control strategies for black pecan aphids through (2.1) assessment of pecan susceptibility (foliar damage ratings, aphid development, and aphid mortality), (2.2) use of plant growth regulators, and (2.3) microbial control agents including Beauveria, Isaria or Metarhizium spp. 3: Develop alternative control strategies for key peach pests (plum curculio, peachtree borers, and stink bugs) via (3.1) reduced-risk insecticides (such as thiamethoxam, flonicamid, and novaluron), (3.2) mating disruption, and (3.3) entomopathogenic nematodes.
Suppression of pecan weevil will focus on developing microbial control tactics including multi-stage entomopathogen applications, enhanced entomopathogen persistence through the use of cover crops, and synergism via combinations of entomopathogens and chemical insecticides. Additionally, pertinent basic studies on entomopathogens will be addressed. Management strategies for the black pecan aphid will use a long term approach to screen pecan for low aphid susceptibility (for use in pecan breeding), whereas, a short term approach will use plant growth regulators and microbial control. Suppression of key peach pests via reduced-risk insecticides, mating disruption, and entomopathogenic nematodes will be examined.