Abstract Numerous annual and perennial weeds infest sugarcane. End-season weed infestations are managed before sugarcane is replanted by fallowing (cultivation sequential glyphosate applications) or rotating to glyphosate-tolerant soybean in Louisiana. With the occurrence of grasses glyphosate-resistant weeds, growers need utilize alternative late POST (LPOST) herbicide programs reduce newly planted (soybean-sugarcane rotation). Current rotational restrictions limit use acifluorfen,...

Herbicide-resistant Amaranthus spp. continue to cause management difficulties in soybean. New soybean technologies under development, including resistance various combinations of glyphosate, glufosinate, dicamba, 2,4-D, isoxaflutole, and mesotrione, will make possible the use additional herbicide sites action than is currently available. When this research was conducted, these traits were still regulated testing programs with appropriate genetics a single experiment not feasible. Therefore,...

Abstract A limited number of herbicides and sites action are registered for use in sugarcane Louisiana. Repeated the same can lead to evolution herbicide resistance weeds. Therefore, it is critical evaluate additional provide growers with options rotating reduce risk resistance. Topramezone, indaziflam, a formulation including mesotrione, bicyclopyrone, atrazine, S -metolachlor, along more common applications (pendimethalin, metribuzin, clomazone, diuron), were evaluated spring injury...

A total of four field experiments were conducted over a 2-yr period (2011 and 2012) near Mokane Moberly, Missouri, to determine the control glyphosate-resistant (GR) waterhemp with dicamba glyphosate applied alone or as tank-mix combination. In one experiment, was at 0.14, 0.28, 0.42, 0.56 kg ae ha −1 without 0.86 GR plants 7.5, 15, 30 cm in height. second sequential treatments plus 4, 7, 14 d after initial herbicide treatment measuring either 7.5 23 Control ranged from 7 62%, 11 40%, 8 30%...

Field experiments were conducted across two locations during 2011 and 2012 to evaluate herbicide options for the control of glyphosate-resistant (GR) giant ragweed GR waterhemp in dicamba-resistant (DR) soybean. All treatments provided 91 100% 3 wk after treatment (WAT). Flumioxazin plus dicamba glyphosate applied preplant greater density reduction than flumioxazin 2,4-D glyphosate. When preplant, addition at either early-postemergence (EPOST) or mid-postemergence (MPOST) timing alone....

Abstract Knowledge of the effects burial depth and duration on seed viability and, consequently, seedbank persistence Palmer amaranth ( Amaranthus palmeri S. Watson) waterhemp [ tuberculatus (Moq.) J. D. Sauer] ecotypes can be used for development efficient weed management programs. This is particular interest, given great fecundity both species their high replenishment potential. Seeds collected from five different locations across United States were investigated in seven states (sites)...

Abstract Palmer amaranth ( Amaranthus palmeri S. Watson) is a problematic weed encountered in U.S. cotton Gossypium hirsutum L.) and soybean [ Glycine max (L.) Merr.] production, with infestations spreading northward. This research investigated the influence of planting date (early, mid-, late season) population (AR, IN, MO, MS, NE, TN) on A. growth reproduction at two locations. All populations planted early or midseason Throckmorton Purdue Agricultural Center (TPAC) Arkansas Agriculture...

A field study was conducted for the 2014 and 2015 growing season in Arkansas, Indiana, Illinois, Missouri, Ohio, Tennessee to determine effect of cereal rye either oats, radish, or annual ryegrass on control Amaranthus spp. when integrated with comprehensive herbicide programs glyphosate-resistant glufosinate-resistant soybean. species included redroot pigweed, waterhemp, Palmer amaranth. The two were: a PRE residual followed by POST application foliar (PRE/POST); herbicide, another...

Carrier water pH, hardness, coapplied foliar fertilizer, conditioning agents, and plant height are critical considerations for optimum herbicide performance. Field studies were conducted to evaluate the effect of carrier pH (4, 6.5, 9) zinc (Zn) or manganese (Mn) fertilizer on mesotrione horseweed Palmer amaranth control. Additionally, was evaluated 7.5-, 12.5-, 17.5-cm tall horseweed. Greenhouse treatments consisted (Zn, Mn, without fertilizer); hardness (0 1,000 mg L −1 ) in presence...

Acetic acid (CH3COOH) is produced naturally through anaerobic fermentation (vinegar) or synthesized various industrial chemical methods. The primary components of vinegar are water and acetic acid. can destroy cell membranes, which then result in plant tissue desiccation death. Therefore, has the potential as a natural contact herbicide for control weeds organically crops. Additional information needed to determine influence concentration, application volume, adjuvants on weed control....

Palmer amaranth and waterhemp have become increasingly troublesome weeds throughout the United States. Both species are highly adaptable emerge continuously summer months, presenting need for a residual PRE application in soybean. To improve season-long control of Amaranthus spp., 19 treatments were evaluated on glyphosate-resistant 2013 2014 at locations Arkansas, Indiana, Nebraska, Illinois, Tennessee; Missouri, Nebraska. The two analyzed separately; data each pooled across site-years,...

Sugarcane bagasse is the fibrous material remaining after removing sucrose, water, and other impurities (filter mud) from millable sugarcane. Louisiana sugarcane mills use a portion of to produce steam power run equipment within mill and/or as boiler fuel for clarification, evaporation, crystallization processes. ash (SBA) by-product thermal conversion bagasse. The purpose this research was investigate SBA an amendment soilless planting media production vegetable seedlings. combined by...

Sugarcane ripening in Louisiana is necessary to ensure adequate sucrose levels early-season harvested sugarcane. The response of nine sugarcane cultivar’s yield components glyphosate and trinexapac-ethyl ripeners was determined field trials. Glyphosate (210 g ae ha-1) (200 ai treatments failed increase yields more than non-ripened ripened with or increased theoretical recoverable (TRS) 4 12% seven out cultivars, but greater TRS values were counterpoised by lower stalk weight. An...

Louisiana sugarcane farmers in 2016 harvested 11.7 million Mg of millable from 163,000 ha, producing 1.47 raw sugar and an estimated 3.5 bagasse. Even though mills use 80% to 90% the bagasse for fuel production, another 350,000 700,000 accumulates each year. The conversion excess into biochar is one solution reduce supply. Research was conducted determine impact as amendment soilless planting media production green bean (Phaseolus vulgaris L.) seedlings. Sugarcane (SBB) pine (PB) were...

Louisiana sugarcane farmers in 2016 harvested 11.7 million Mg millable from 163,000 ha, producing 1.47 of raw sugar and an estimated 3.5 bagasse. Even though mills use 80 to 90% the bagasse for fuel production, another 350,000 700,000 accumulates each year. The conversion excess into biochar is excellent option with numerous uses. Research was conducted determine impact as amendment soilless planting media production cucurbit seedlings. Two biochars were combined by volume a commercial...

Adoption of soybean that is resistant to 2,4-D will result in more use glyphosate plus premixes and tank mixtures. Preliminary whole-plant greenhouse assays confirm most Palmer amaranth populations found Indiana are glyphosate-resistant (GR), some biotypes exhibit tolerance amine. Dose–response experiments were conducted determine the level resistance amine four biotypes. A premix formulation choline was also evaluated. The R1, R2, R3 31- 66-fold (R:S ratio) than S1 biotype based on...

Herbicide-resistant weeds, especially Palmer amaranth (Amaranthus palmeri S. Watson), are problematic in row-crop producing areas of the United States. The objectives this study were to determine if chlorimuron-ethyl, fomesafen, and glyphosate applied separately mixtures control A. confirm presence various genotypes surviving two- three-way herbicide mixtures. Fifteen percent treated with mixture survived. Mixing fomesafen chlorimuron-ethyl or create a two-way reduced survival 22 24% 60 62%...

The chemical interaction between plants, which is referred to as allelopathy, may result in the inhibition of plant growth and development. objective this research was determine allelopathic impact sugarcane (Saccharum officinarum) var. ‘HoCP 96-540’ field residue bagasse extracts on germination three vegetable crops. Tomato (Solanum lycopersicum L.), Chinese kale (Brassica oleracea L. alboglabra Bailey), cucumber (Cucumis sativus L.) seeds were treated with 4 extract concentrations (0,...

Abstract ‘Ho 07‐613’ (Reg. no. CV‐208, PI 699606) sugarcane (an interspecific hybrid of Saccharum officinarum L., S. barberi Jeswiet, spontaneum and sinense Roxb. amend. Jeswiet) was selected evaluated by scientists at the USDA‐ARS, working cooperatively with Louisiana State University Agricultural Center American Sugar Cane League, Inc. It released to growers in 2014. The cultivar tested across crop cycle (plant cane first second ratoon) 12 farm locations compared ‘HoCP 96‐540’, most widely...

Abstract Controlling weeds is a critically important task in sugarcane production systems. Weeds compete for light, nutrients, and water, if they are not managed properly can negatively impact yields. Accurate detection of versus desired plants was assessed using hyperspectral pigment analyses. Leaf samples were collected from four commercial Louisiana varieties, nine weed species commonly found fields. Hyperspectral leaf reflectance data (350 to 850 nm) all samples. Plant (chlorophylls...

Louisiana processed 11.7 million mt of sugarcane in 2016, producing 1.47 raw sugar and an estimated 3.5 bagasse. Sugarcane bagasse is the fibrous material remaining after removing sucrose, water, other impurities (filter mud) from millable sugarcane. Typically, mills burn a portion to heat boilers steam power mill for grinding processing. The balance stored at where it accumulates immense piles. Research was conducted 2015 2016 investigate use as natural mulch vegetable production. field...

Allelopathy, the chemical interaction between plants, may result in inhibition of plant growth and development, which can include compounds released from a crop that adversely impact weed species. The objective this research was to determine allelopathic sugarcane (Saccharum officinarum) field residue root water extracts on seed germination three Red morningglory (Ipomoea coccinea L.), redroot pigweed (Amaranthus retroflexus spiny amaranth spinosus L.)] seeds were treated with five extract...

Abstract Burning postharvest sugarcane residue is a standard practice to remove extraneous leaf material before spring regrowth. Live-fires were simulated from field-collected and seeds of divine nightshade itchgrass exposed dry moistened (PHR) at four densities (6.1, 12.1, 18.2, 24.2 Mg ha −1 ) nonburned control. The moisture content rainfall was 14% more in Experiment 2 than 1; however, burning PHR with 44% when wind speeds lower allowed the fire continue created smoldering effect that...

Cover crops are sustainable alternatives to current fallow practices (cultivation with and without synthetic herbicides) for sugarcane cultivation in Louisiana. Potential benefits of such ecological approach include additional profits from harvested cash crops, pest/disease management, retention highly erodible alluvial soils. This study investigated the impact conventional (tillage glyphosate) newer (sweet sorghum soybean cover crops) on chemical quality juice extracted first-ratoon four...

Glyphosate‐resistant (GR) Palmer amaranth ( Amaranthus palmeri S. Wats.) prevalence in Midwest soybean [ Glycine max (L.) Merr.] production has increased recent years. New herbicide‐resistant traits will be important management tools for weeds. The objectives of this research were to evaluate preemergence (PRE) herbicide treatments that contain dicamba, isoxaflutole, metribuzin, S ‐ metolachlor, and 2,4‐D GR control. Herbicide programs contained isoxaflutole provided 58 95% control compared...