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Title: Cutleafgroundcherry (physalis angulata) density, biomass and seed production in peanut (arachis hypogaea L.) following regrowth due to inadequate control

Author
item Price, Andrew
item MONKS, C - Auburn University
item KELTON, J - Auburn University

Submitted to: Peanut Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/1/2013
Publication Date: 3/1/2014
Citation: Price, A.J., Monks, C.D., Kelton, J.A. 2014. Cutleaf groundcherry (physalis angulata) density, biomass and seed production in peanut (arachis hypogaea L.) following regrowth due to inadequate control. Peanut Science. 40:120-126.

Interpretive Summary: Cutleaf groundcherry, a summer annual weed, can negatively affect peanut quality. A field experiment evaluated herbicide and application timing on cutleaf groundcherry density, biomass, seed production, and crop yield in a peanut system. Hand pruning and herbicide treatments were initiated at four weekly intervals beginning in June of each year. Strongarm™ herbicide applied preemergence provided season-long cutleaf groundcherry control; Cadre™ herbicide applied postemergence also provided excellent control. Use of basagran herbicide alone or mixed with Classic™ herbicide, or hand-pruning resulted in similar cutleaf groundcherry 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 groundcherry control. Highest yields were recorded for Strongarm™ preemergence and postemergence applications containing 2,4-DB and Cadre™ with 6,044, 5,986, and 6,430 kg ha-1, respectively.

Technical Abstract: A field experiment was conducted to evaluate herbicide and application 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 preemergence (PRE) alone at 0.027 kg ai ha-1; 4) paraquat applied at cracking early postemergence (EPOST) at 0.14 kg ai ha-1 followed by bentazon at 0.56 kg ai ha-1 late postemergence (POST) alone or mixed with 5) 2,4-DB at 0.22 kg ae ha-1; 6) acifluorfen at 0.28 kg ai ha-1; 7) imazapic at 0.07 kg ai ha-1; or 8) chlorimuron ethyl at 0.00875 kg ai ha-1. Hand pruning and POST herbicide treatments were initiated at four weekly intervals beginning in June of each year. Diclosulam applied PRE provided season-long cutleaf groundcherry control; imazapic applied POST also provided excellent control. Use of basagran alone or mixed with chlorimuron ethyl, or hand pruning resulted in similar cutleaf groundcherry 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 groundcherry control. Highest yields were recorded for diclosulam PRE and POST applications containing 2,4-DB and imazapic with 6,044, 5,986, and 6,430 kg ha-1, respectively.