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South Carolina Peanut Update
Peanut acres in the state were more than half planted at the beginning of this week. Several days of rain brought much needed moisture to many dry fields. This will help with recent plantings to emerge and to activate residual herbicides.
If rain prevented or delayed preemergent herbicide application until after cracking/early emergence, this will be too late for Valor or Prowl. In that case Dual + Strongarm would help (watch rotation intervals). If weeds are coming up by the time we can get into the field, we can consider an early post application of paraquat plus safener (Basagran or Storm). In the absence of Valor applied PRE, paraquat + Storm (+ Dual/Warrant) would help to manage ALS-resistant pigweed. Paraquat sprayed at psi over 30 increases injury.
Anthem Flex is also newly available this year for peanut. Comments from Drs. Jordan and Prostko on its use (POST) can be found here (Anthem Flex Peanut Notes no. 34 2020). Dr. Marshall can be consulted for more comments and recommendations on its use.
In some not all cases with earlier planted fields (last week of April or first full week of May, different in furrow insecticides used), there is some j-rooting or skippy stands. Both of these are generally contributed by less than ideal seed quality (vigor) and slow growing conditions. With the cost of seed, replanting is usually cost inhibitory unless stands are less than 2 per foot. In those cases if possible, supplemental replanting at a lower rate by moving the planter over a few inches can help to retain what is up and add where there might be skips. Not easy to do on beds. Inoculant and in-furrow insecticide would need to be added. If seed quality is in question, planting shallower can help improve emergence. Warmer overall conditions will help too.
Thrips feeding activity so far seems to be decreasing compared to earlier in the year. Sometimes we see an increase again come early June, but this varies from year to year.
Extension Peanut Specialist and Assistant Professor
Department of Plant and Environmental Sciences
Clemson University – Edisto Research and Education Center