Evaluation of Oriental Mustard (Brassica juncea) Seed Meal for Weed Suppression in Turf

Abstract Oriental mustard seed meal (MSM), a byproduct generated by pressing the seed for oil, exhibits herbicidal properties. In turfgrass, soil fumigants such as methyl bromide are used to control weeds prior to renovation of turf. Environmental concerns have resulted in deregistration of methyl bromide, prompting the need for alternatives. The objective of this research was to determine the effect of MSM on the establishment of selected turfgrass weeds as well as inhibitory effects on establishment of desirable turfgrasses. Greenhouse experiments were conducted in 2006 and 2007 at the University of Missouri. MSM was amended in soil at 0, 1,350 (low), 2,350 (medium), and 3,360 kg ha−1 (high) concentrations. Weed species included annual bluegrass, large crabgrass, buckhorn plantain, white clover, and common chickweed. Turfgrass species included: Rembrandt tall fescue, Evening Shade perennial rye, and Riviera bermudagrass. All species were seeded into soil amended with MSM and either tarped or left untarped. All treatments were compared to dazomet (392 kg ha−1), a synthetic standard. Plant counts and biomass of all species were recorded 4 wk after seeding. Overall, tarped treatments suppressed weed emergence 27 to 50% more compared to untarped treatments, except for large crabgrass. High rates of MSM suppressed emergence of all weeds ≥ 63%. Compared to the untreated control, the density of buckhorn plantain, white clover, and common chickweed was reduced by ≥ 42% at low rates of MSM. Biomass of buckhorn plantain, annual bluegrass, common chickweed, white clover, and large crabgrass was reduced from 37 to 99% at high rates of MSM. MSM at high rates reduced stand counts of tall fescue and perennial ryegrass up to 81% and 77% respectively, compared to the untreated control. Regardless of MSM rates or tarping, suppression of common bermudagrass emergence did not exceed 30%; tarped treatments actually increased bermudagrass emergence by 22%. The biomass for tall fescue, perennial ryegrass, and bermudagrass was reduced by 85, 68, and 10%, respectively, at high rates of MSM. For tall fescue, MSM at all rates strongly suppressed seed germination by 7 d after planting (DAP) (up to 100%), with additional germination observed through 14 DAP, but not thereafter. In both trials, dazomet completely suppressed emergence of all weeds. MSM appears to suppress emergence and growth of a number of weeds common in turf, with potential selectivity for bermudagrass. Nomenclature: Dazomet, tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione; glucosinolates (GSL); isothiocyanates (ITC); methyl isothiocyanate (MITC); Oriental mustard, Brassica juncea (L.) Czern.; annual bluegrass, Poa annua L. POAAN; buckhorn plantain, Plantago lanceolata L. PLALA; common chickweed, Stellaria media (L.) Vill. STEME; large crabgrass, Digitaria sanguinalis (L.) Scop. DIGSA; white clover, Trifolium repens L. TRFRE; ‘Evening Shade’ perennial rye, Lolium perenne L. LOLPE; ‘Rembrandt’ tall fescue, Festuca arundinacea Schreb. FESAR; ‘Riviera’ bermudagrass, Cynodon dactylon (L.) Pers.

[1]  Q. Ma.  Handbook of Turfgrass Management and Physiology , 2009 .

[2]  J. Reganold,et al.  Role of native soil biology in Brassicaceous seed meal-induced weed suppression. , 2008 .

[3]  M. Morra,et al.  Vegetable crop emergence and weed control following amendment with different Brassicaceae seed meals , 2007, Renewable Agriculture and Food Systems.

[4]  D. Pimentel.  Encyclopedia of Pest Management, Volume II , 2007 .

[5]  S. Snapp,et al.  Root, shoot tissues of Brassica juncea and Cereal secale promote potato health , 2007, Plant and Soil.

[6]  M. Mazzola,et al.  Mechanism of action and efficacy of seed meal-induced pathogen suppression differ in a brassicaceae species and time-dependent manner. , 2007, Phytopathology.

[7]  S. Vaughn,et al.  Herbicidal activity of glucosinolate-containing seedmeals , 2006, Weed Science.

[8]  J. Kirkegaard,et al.  Biofumigation and Enhanced Biodegradation: Opportunity and Challenge in Soilborne Pest and Disease Management , 2006 .

[9]  Erin R. Haramoto,et al.  Brassica cover cropping: I. Effects on weed and crop establishment , 2005, Weed Science.

[10]  L. Rahman,et al.  Suppression of root knot nematode (Meloidogynejavanica) after incorporation of Indian mustard cv. Nemfix as green manure and seed meal in vineyards , 2005, Australasian Plant Pathology.

[11]  P. Landschoot,et al.  Effect of dazomet on annual bluegrass emergence and creeping bentgrass establishment in turf maintained as a golf course fairway , 2003 .

[12]  S. Yates,et al.  Reducing fumigant emissions after soil application. , 2002, Phytopathology.

[13]  D. Pimentel.  Encyclopedia of Pest Management , 2002 .

[14]  J. B. Unruh,et al.  Fumigant Alternatives for Methyl Bromide Prior to Turfgrass Establishment1 , 2002, Weed Technology.

[15]  D. Granatstein,et al.  Suppression of Specific Apple Root Pathogens by Brassica napus Seed Meal Amendment Regardless of Glucosinolate Content. , 2001, Phytopathology.

[16]  S. Yates,et al.  An approach for estimating the permeability of agricultural films. , 2001, Environmental science & technology.

[17]  D. Holshouser,et al.  Weed Control in Soybean (Glycine max) with Green Manure Crops , 1998, Weed Technology.

[18]  R. Boydston,et al.  Weed suppression with Brassica green manure crops in green pea , 1997, Weed Science.

[19]  R. Boydston,et al.  Rapeseed (Brassica napus) Green Manure Crop Suppresses Weeds in Potato (Solanum tuberosum) , 1995, Weed Technology.

[20]  M. Morra,et al.  Glucosinolate-containing plant tissues as bioherbicides , 1995 .

[21]  A. McGuire.  Mustard Green Manures Replace Fumigant and Improve Infiltration in Potato Cropping System , 2003 .

[22]  J. Kirkegaard,et al.  Biofumigation potential of brassicas. I. Variation in glucosinolate profiles of diverse field-grown brassicas , 1998 .

[23]  M. Morra,et al.  Control of soil-borne plant pests using glucosinolate-containing plants , 1997 .

[24]  J. H. Wilson,et al.  Managing Meloidogyne chitwoodi on potato with rapeseed as green manure , 1993 .

[25]  J. Kirkegaard,et al.  Biofumigation: using Brassica species to control pests and diseases in horticulture and agriculture , 1993 .

[26]  M. Cullen,et al.  Methyl bromide intoxication in four field-workers during removal of soil fumigation sheets. , 1990, American journal of industrial medicine.