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As growers consider using higher seeding rates to help access the genetic potential for higher yield potential, it's important to consider how higher populations can also lead to more plant stress. Anthracnose Stalk Rot (ASR) can be one of the most damaging corn diseases in New York and Pennsylvania. An understanding of how higher plant populations affect the severity of ASR can help growers in corn product selection and aid in selecting the appropriate plant population.
Figure 1. Corn stalks at Verona, New York displaying late season disease symptoms of shiny black discoloration of outer stalk (left) and internal discoloration at the nodes common with Anthracnose stalk rot (right). c
Determine the impact of three plant populations on incidence of ASR in corn products with varying degrees of ASR tolerance.
Twelve corn products (92-103 RM) with an ASR tolerance rating of 4 or 5 were selected for this trial. All corn products were planted at low, medium and high populations (24,000, 36,000 and 48,000 plants per acre). Evaluations for incidence of ASR were conducted at two locations – Canandaigua (Ontario Co.) and Verona (Oneida Co.), NY. Evaluations were made by harvesting five consecutive, typical stalks. For each stalk, the number of nodes infected with ASR and nodes with greater than 75% necrosis were measured.
Figure 2. 2017 Anthracose stalk rot rating averaged over plant population for 2 locations in New York.
For additional agronomic information, please contact your local brand representative. Developed in partnership with Technology, Development & Agronomy by Monsanto. The information discussed in this report is from a single site, twice replicated demonstration. This informational piece is designed to report the results of this demonstration and is not intended to infer any confirmed trends. Please use this information accordingly.
Individual results may vary, and performance may vary from location to location and from year to year. This result may not be an indicator of results you may obtain as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible. ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. All other trademarks are the property of their respective owners. ©2018 Monsanto Company. All Rights Reserved. 171214110859 01182018AMH