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Cutleaf groundcherry (physalis angulata) density, biomass and seed production in peanut (arachis hypogaea L.) following regrowth due to inadequate control
- A. J. Price, C. D. Monks, J. A. Kelton
- Peanut Science 2014 v.40 no.2 pp. 120-126
- 2,4-DB, Arachis hypogaea, Physalis angulata, acifluorfen, bentazon, biomass, cherries, chlorimuron ethyl, cracking, crop yield, diclosulam, field experimentation, imazapic, paraquat, peanuts, pesticide application, plant density, pruning, regrowth, seed productivity, weed control, weeds
- A field experiment evaluated simulated salvage herbicide application injury and injury timing on cutleaf groundcherry density, biomass, seed production, and crop yield in a peanut system. Treatments included: 1) a non-treated control; 2) hand pruning; 3) diclosulam applied preemer- gence (PRE) alone at 27 g/ha ; 4) paraquat applied at cracking early postemergence (EPOST) at 140 g/ha followed by bentazon at 560 g/ha late postemergence (POST) alone or mixed with 5) 2,4- DB at 220 g/ha; 6) acifluorfen at 280 g/ha; 7) imazapic at 70 g/ha; or 8) chlorimuron ethyl at 9 g/ ha. Hand pruning and POST herbicide treatments were performed at 1-week intervals for four weeks beginning in June of each year. Herbicide treat- ments do not reflect current peanut herbicide recommendations but were chosen based on likely differential cutleaf groundcherry biomass and subsequent seed production. Diclosulam applied PRE provided season-long cutleaf groundcherry control; imazapic applied POST in combination with bentazon also provided excellent control. Use of bentazon alone or mixed with chlorimuron ethyl, or hand pruning resulted in similar cutleaf ground- cherry biomass and subsequent seed production compared to the non-treated control in almost all comparisons. Peanut yield reflected early-season weed interference and late season cutleaf ground- cherry control. Highest yields were recorded for diclosulam PRE and POST applications containing 2,4-DB and imazapic with 6040, 5990, and 6430 kg/ ha, respectively. When early-season weed control efforts fail to completely control cutleaf ground- cherry, it is crucial to have effective late season herbicide options for salvage treatments in order to prevent additions to the seed bank.