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ARS Home » Plains Area » Stillwater, Oklahoma » Wheat, Peanut, and Other Field Crops Research » Research » Research Project #429866

Research Project: Integrated Management of Peanut Diseases

Location: Wheat, Peanut, and Other Field Crops Research

Project Number: 3072-21220-008-13-N
Project Type: Non-Funded Cooperative Agreement

Start Date: Jan 1, 2016
End Date: Dec 31, 2020

The hypothesis is that integration of varieties with genetic resistance to diseases into peanut production systems will increase profitability because of increased yields and reduced reliance on fungicide application. Objective 1. Determine the minimum level of fungicide inputs required for efficient peanut production and determine the disease and yield responses of susceptible and partially resistant peanut varieties to various levels of input. Objective 2. Evaluate germplasm for resistance to Sclerotinia blight and other important peanut diseases. Objective 3. Continue screening fungicides, nematicides, and biological control agents for effectiveness against various peanut diseases to determine efficient use patterns and resistance management strategies.

Objective 1. For Sclerotinia blight, field studies will be conducted at the Caddo Research Station to determine the yield responses of new varieties and breeding lines to reduced and full fungicide programs for Sclerotinia blight, in comparison to no treatment. Net returns for the treatments will be calculated to determine the most profitable management strategy. Experimental designs will consist of split plots designs with 4 replications in which entry (variety or breeding line) will be the main plot and fungicide program will be the sub-plot. Objective 2. New breeding lines, varieties, and germplasm will be evaluated for reaction to Sclerotinia blight, other soilborne diseases such as pod rot, and foliar diseases. Variety trials and germplasm development trials will be evaluated for levels of disease at each opportunity. Variety trials typically consist of randomized complete block designs with 4 replications. Objective 3. Fungicides and nematicides under development or newly registered will be compared to registered standards for control of early leaf spot, southern blight, limb and pod rots, Sclerotinia blight, and northern root knot nematode. Application programs using various rates, timings, alternations, and tank-mixtures will be evaluated in comparison to labeled use patterns of standard treatments. Pesticide efficacy trials typically consist of randomized complete block designs with 4 replications.