Critical Period of Weed Interference in Peanut

Everman, Wesley J.; Clewis, Scott B.; Thomas, Walter E.; Burke, Ian C.; Wilcut, John W.

doi:10.1614/wt-07-052.1

Cited by 49 publications

(60 citation statements)

References 37 publications

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Section: Peanut Is a Valuable Commodity In The Unitedmentioning

confidence: 99%

“…Weeds compete with peanut for sunlight, moisture, and nutrients throughout the growing season (Wilcut et al, 1994), and negatively affect yield, quality, and economic value (Everman et al, 2008;Walker et al, 1989). Seasonlong interference from combinations of broadleaf and grass weeds can reduce peanut yield by 60 to 80% and can decrease harvest efficiency in some instances (Everman et al, 2008;Wilcut et al, 1994). In studies investigating the effect of season-long interference from individual weed species, common ragweed (Ambrosia artemisiifolia L.) (Clewis et al, 2001) and Palmer amaranth [Amaranthus palmeri (S.) Wats] (Burke et al, 2007) at a density of 1 plant/m of row, resulted in peanut yield losses of 40 and 28%, respectively.…”

Section: Peanut Is a Valuable Commodity In The Unitedmentioning

confidence: 99%

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Weed Control and Peanut (Arachis hypogaea L.) Response to Acetochlor Alone and in Combination with Various Herbicides

et al. 2018

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Acetochlor, a chloroacetamide herbicide, is now registered for preplant (PPI), preemergence (PRE), and postemergence (POST) application in peanut. Field research was conducted during 2011 and 2012 in Georgia and North Carolina to determine peanut response and weed control by acetochlor compared with S-metolachlor alone and in programs with other herbicides. In weedfree experiments, peanut tolerance to acetochlor (1.26 and 2.52 kg ai/ha) and S-metolachlor (1.42 kg ai/ha) were evaluated when applied PPI, PRE, early postemergence (EPOST), or POST. Peanut tolerance to acetochlor was similar to S-metolachlor with no negative impact of either herbicide on peanut yield compared with non-treated peanut in absence of weed interference. When applied PRE, acetochlor controlled Palmer amaranth, pitted morningglory, sicklepod, and Texas millet similarly to S-metolachlor while control of broadleaf signalgrass was greater with S-metolachlor. Weed control programs containing EPOST and/or POST applications of herbicides following PRE herbicides provided the best overall weed control but did not affect yellow nutsedge control regardless of whether acetochlor or S-metolachlor were applied. Herbicide programs including PRE, EPOST, and POST herbicides most often resulted in the greatest yields. There was no difference in peanut yield regardless of the presence of acetochlor or S-metolachlor in a comprehensive herbicide program.

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Section: Peanut Is a Valuable Commodity In The Unitedmentioning

confidence: 99%

Section: Peanut Is a Valuable Commodity In The Unitedmentioning

confidence: 99%

Weed Control and Peanut (Arachis hypogaea L.) Response to Acetochlor Alone and in Combination with Various Herbicides

et al. 2018

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“…Differing critical periods for weed control between different years, regions or crops are common in literature because many factors can affect the duration of this period. The relative competitive ability of different weed species affects the duration of this critical period (Everman et al 2008(Everman et al , knezevic et al 2002. Generally, the critical period for weed control for a given crop species varies greatly and depends on the density of weed infestation, weed species characteristics, crop species characteristics, climatic conditions, and environment (knott and Halila 1986).…”

Section: Resultsmentioning

confidence: 99%

Impact of the timing and duration of weed control on the establishment of a rubber tree plantation

Guzzo

Carvalho

Giancotti

et al. 2014

An. Acad. Bras. Ciênc.

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Rubber tree production is reduced by weeds that compete for environmental resources; therefore, the timing and duration of weed control influences weed interference. The objectives of this study were to evaluate the growth of rubber tree (Hevea brasiliensis) plants, to determine the critical period for weed control, and to evaluate the growth recovery of rubber trees that coexisted with weeds for different periods of time after planting. Two groups of treatments were established under field conditions in the first year of the investigation: one group contained crescent periods of weed infestation, while the other contained crescent periods of weed control, also including a weed-free check and a total weedy check. In the second year of the investigation, the weeds were totally controlled. Urochloa decumbens was the dominant weed (over 90% groundcover). Crop growth was greatly reduced due to the weed interference. Plant height decreased more rapidly than did any other characteristic. Plant height, leaf dry mass, and leaf area decreased by 99%, 97% and 96%, respectively, and were the most reduced characteristics. Plant height also recovered more rapidly than did any characteristic when the period of weed control was lengthened. However, stem dry mass increased by 750%, making it the most recovered characteristic. The critical period for weed control was between 4 and 9½ months after planting in the first year; however, the rubber trees showed an expressive growth recovery when the weeds were controlled throughout the second year.

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“…), sicklepod (Senna obtusifolia L.), and wild poinsettia (Euphorbia heterophylla L.) (Bridges et al 1992;Hauser et al 1982;York and Coble 1977). Mixed populations of weed species can also reduce peanut yield if not controlled in the first 8 wk after planting (Everman et al 2008). Regardless of level of cutleaf groundcherry control, no other treatment improved peanut yield over the non-treated in 2011.…”

Section: ---------------Plants/ha -----------------------------------mentioning

confidence: 99%

Cutleaf Groundcherry (Physalis angulata) Density, Biomass and Seed Production in Peanut (Arachis hypogaeaL.) Following Regrowth Due to Inadequate Control

Price¹,

Monks²,

Kelton³

2013

Peanut Science

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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 preemergence (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 treatments 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 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 6040, 5990, and 6430 kg/ ha, respectively. When early-season weed control efforts fail to completely control cutleaf groundcherry, it is crucial to have effective late season herbicide options for salvage treatments in order to prevent additions to the seed bank.Nomenclature: Acifluorfen, bentazon, chlorimuron ethyl, diclosulam, imazapic, paraquat, 2,4-DB, cutleaf groundcherry, Physalis angulata (L.) PHYAN, peanut, Arachis hypogaea (L.).

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Critical Period of Weed Interference in Peanut

Cited by 49 publications

References 37 publications

Weed Control and Peanut (Arachis hypogaea L.) Response to Acetochlor Alone and in Combination with Various Herbicides

Weed Control and Peanut (Arachis hypogaea L.) Response to Acetochlor Alone and in Combination with Various Herbicides

Impact of the timing and duration of weed control on the establishment of a rubber tree plantation

Cutleaf Groundcherry (Physalis angulata) Density, Biomass and Seed Production in Peanut (Arachis hypogaeaL.) Following Regrowth Due to Inadequate Control

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