Dan Anco Comments Clemson Peanut Notes No. 68 2021
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Dan Anco Comments (photos can be found at the following link)
Forecast has hot and dry weather settling in the next week out with highs in the 90s. Heat units are here, now back to looking for rain to replenish soil moisture. Most stands that were planted earlier and are up now look in good shape. Soil moisture is becoming limited across the state, slowing what planting remains. Less than 1/3rd of peanut acres have yet to go in the ground.
Save the date: In-person Peanut and Agronomic Crops Field Day set for September 2, 2021 (first Thursday) at Edisto REC in Blackville. More details to come as we near the event.
Some recent items that have come up included:
Does imidacloprid harm inoculant in-furrow? Imidacloprid + inoculant is safe and will not harm the inoculant. Same can be said for the familiar in furrow products: AgLogic, Thimet, Velum, Proline, and Propulse. In-furrow fertilizers on the other hand can be damaging and are not recommended (pictures attached).
Paraquat + basagran + acephate as a tank mix is okay. The acephate does not increase burn from the herbicides in this mixture.
Peanuts are 21 days old, can I spray paraquat? Paraquat timing extends out to 28 days after cracking. Can add safener (basagran/storm) to reduce burn and a residual to add preemergence control.
How deep can we plant to reach moisture before it becomes too deep? Seed quality is better this year than last, which makes a big difference. I like to recommend a maximum of 3 inches deep.
How does imidacloprid compare versus Velum in furrow? Velum is labeled for suppression of diseases like Aspergillus crown rot, leaf spot, white mold and nematodes. Imidacloprid protects against thrips only. If Velum is used, an insecticide (like imidacloprid) for thrips protection should be added with it. With the weather turning hot and dry, there is more risk for Aspergillus crown rot. Good seed quality is the first line of defense, and seed treatments and in-furrow fungicide (like Velum) can add help.
Does a calibration to apply more gallons per acre in-furrow put out more product active ingredient? Dilution rate or carrier volume refers to the volume of tank solution applied per acre. Higher dilution rates (8 to 12 gallons per acre) can help with getting inoculant evenly through the furrow to come in contact with the seed, compared with a more concentrated dribble at lower volumes (5 gallons per acre is about a half oz per 10 ft of row on 38″ singles). Planting twin rows doubles the number of furrows per acre. Applying the same maximum labeled acre rate of an insecticide splits the rate in half between the two furrows, with the same for inoculant. To get a full rate of inoculant in each furrow, a double rate (per acre) is prepared to match the doubled number of furrows.
Dan Anco
Extension Peanut Specialist and Associate Professor
Department of Plant and Environmental Sciences
Clemson University – Edisto Research and Education Center
