Bio Huma Netics, Inc.

Promax Controls Nematodes for English Boxwood (HG)

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1331 W. Houston Avenue, Gilbert, AZ 85233 | 800.961.1220 | Fax 480.425.3061 | info@humagro.com | www.humagro.com ©2018, Trademarks and registered trademarks are property of Bio Huma Netics, Inc. Field Trial Objective This two-year trial aimed to assess the suppression effects of PROMAX ® and 2 types of beneficial nematode treatments (S. feltiae and S. riobrave) versus a control on plant-parasitic nematodes (Stunt, Lance, Ring, and Spiral) for English Boxwood (Buxus sempervirens L. var. suffruticosa) ornamental plants. Materials and Methods Each experimental unit consisted of 2 English Boxwood plants with a Wheeling silt loam soil type (20% sand, 64% silt, 16% clay). Each experimental unit (16 total boxes) was separated from the next by at least 1 untreated boxwood plant. Soil samples (15–20 cores) from the boxwood plants were recorded before the treatment and at 7 and 30 days after one treatment was given. Treatments with S. feltiae and S. riobrave were accomplished by applying infective juveniles at a rate of 1.0 billion per acre (2.5 billion per hectare). PROMAX ® was applied at a rate of 1 gallon per acre (10 liters per hectare). Nematode species were identified and counted after each soil sample was taken. Species identified for this study were as follows: Stunt (Tylenchorhynshus sp.), Lance (Hoplolaimus sp.), Ring (Mesocriconema sp.), and Spiral (Rotylenchus buxophilus). The following year, the experiment was repeated with a second round of treatments and calculations of the nematode population percentages. Results Promax ® Controls Nematodes for English Boxwood Ornamental Plants Virginia Tech Kentland Experimental Research Farm, McCoy, Va. The original report is available on request. Stunt Lance Ring Spiral 100 200 300 400 500 600 700 Control S. feltiae S. riobrave Promax ® Baseline Level Change in Nematode Counts (%) Figure 1. Year 1 Percentage Change in Nematode Counts for English Boxwood Plants, 30 Days After Treatment, Control and 3 Treatment Types for 4 Nematode Types Stunt Lance Ring Spiral 100 200 300 400 500 600 700 Control S. feltiae S. riobrave Promax ® Baseline Level Change in Nematode Counts (%) Figure 2. Year 2 Percentage Change in Nematode Counts for English Boxwood Plants, 30 Days After Treatment, Control and 3 Treatment Types for 4 Nematode Types Conclusion The results reported in this trial demonstrate that application of 1 treatment of the nematicide PROMAX ® reduced population percentages of the 4 plant-parasitic nematodes studied at both 7 days and 30 days post-treatment in years 1 and 2, with PROMAX ® being more effective than the other 2 treatments studied for both time periods. This is an indication that PROMAX ® suppresses nematodes by killing them on contact. Repeated applications may be required to achieve suppression for periods longer than 30 days. Product Description PROMAX ® is an organic, OMRI-listed, EPA-exempt broad- spectrum soil fungicide and nematicide. It is a protective and curative pesticide recommended for control of plant parasitic nematodes and soil-borne diseases. The mode of action is as a contact killer. There is no restricted use. Additionally, PROMAX ® enhances root growth and, as a result, reduces susceptibility to secondary root infection. For best results, 7–10 days after the final PROMAX ® treatment is completed, Huma Gro® recommends applying ZAP ® at 1 gal/acre (10 liters/hectare) for the stimulation of beneficial soil biology. HG-180514-01

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