Nonconventional Weed Management Strategies for Modern Agriculture

Abstract Weeds are a significant problem in crop production and their management in modern agriculture is crucial to avoid yield losses and ensure food security. Intensive agricultural practices, changing climate, and natural disasters affect weed dynamics and that requires a change in weed management protocols. The existing manual control options are no longer viable because of labor shortages; chemical control options are limited by ecodegradation, health hazards, and development of herbicide resistance in weeds. We are therefore reviewing some potential nonconventional weed management strategies for modern agriculture that are viable, feasible, and efficient. Improvement in tillage regimes has long been identified as an impressive weed-control measure. Harvest weed seed control and seed predation have been shown as potential tools for reducing weed emergence and seed bank reserves. Development in the field of allelopathy for weed management has led to new techniques for weed control. The remarkable role of biotechnological advancements in developing herbicide-resistant crops, bioherbicides, and harnessing the allelopathic potential of crops is also worth mentioning in a modern weed management program. Thermal weed management has also been observed as a useful technique, especially under conservation agriculture systems. Last, precision weed management has been elaborated with sufficient details. The role of remote sensing, modeling, and robotics as an integral part of precision weed management has been highlighted in a realistic manner. All these strategies are viable for today’s agriculture; however, site-specific selection and the use of right combinations will be the key to success. No single strategy is perfect, and therefore an integrated approach may provide better results. Future research is needed to explore the potential of these strategies and to optimize them on technological and cultural bases. The adoption of such methods may improve the efficiency of cropping systems under sustainable and conservation practices.

[1]  T. R. Migo,et al.  Post-dispersal predation of weed seeds in rice fields , 2010 .

[2]  Graham Brodie,et al.  An assessment of microwave soil pasteurization for killing seeds and weeds , 2007 .

[3]  S. Dabney.  Killing cover crops mechanically: Review of recent literature and assessment of new research results , 2002 .

[4]  J. H. Everitt,et al.  Using airborne middle-infrared (1.45–2.0 μm) video imagery for distinguishing plant species and soil conditions , 1987 .

[5]  Palle Kristoffersen,et al.  A review of non-chemical weed control on hard surfaces , 2007 .

[6]  R. Blackshaw,et al.  Nitrogen Fertilizer Rate Effects on Weed Competitiveness is Species Dependent , 2008, Weed Science.

[7]  Herman Ramon,et al.  Effects of Spring-tine Settings and Operational Conditions on the Mechanical Performance of a Weed Harrow Tine , 2005 .

[8]  R. Papa,et al.  Durum wheat and allelopathy: toward wheat breeding for natural weed management , 2013, Front. Plant Sci..

[9]  Z. Cai,et al.  Changes in weed composition of winter wheat crops due to long-term fertilization , 2005 .

[10]  G. Mauromicale,et al.  Soil solarization, a nonchemical method to control branched broomrape (Orobanche ramosa) and improve the yield of greenhouse tomato , 2005, Weed Science.

[11]  N. McRoberts,et al.  Phalaris minor seedbank studies: longevity, seedling emergence and seed production as affected by tillage regime , 2007 .

[12]  M. Farooq,et al.  Alternative control of wild oat and canary grass in wheat fields by allelopathic plant water extracts , 2009, Agronomy for Sustainable Development.

[13]  Pratap Bhanu Singh Bhadoria,et al.  Allelopathy: a natural way towards weed management. , 2010 .

[14]  D. K. Giles,et al.  Precision weed control system for cotton , 2002 .

[15]  M. R. Carter,et al.  Developing disease-suppressive soils through crop rotation and tillage management practices , 2003 .

[16]  Scott D. Noble,et al.  Site-specific weed management: sensing requirements— what do we need to see? , 2005, Weed Science.

[17]  C. Mallory-Smith,et al.  Investigation of wheat as a trap crop for control of Orobanche minor , 2006 .

[18]  Stephan Getzin,et al.  Assessing biodiversity in forests using very high‐resolution images and unmanned aerial vehicles , 2012 .

[19]  A. M. Tulikov,et al.  Effect of long-term fertilizer application and crop rotation on the infestation of fields by weeds. , 2006 .

[20]  Karen Anderson,et al.  Lightweight unmanned aerial vehicles will revolutionize spatial ecology , 2013 .

[21]  Rew,et al.  Evaluating the accuracy of mapping weeds in seedling crops using airborne digital imaging: Avena spp. in seedling triticale , 1999 .

[22]  Roger D. Cousens,et al.  The effect of weed distribution on predictions of yield loss. , 1990 .

[23]  F. A. Benson,et al.  Electrical methods of killing plants , 1984 .

[24]  M. Azmi,et al.  Control of weedy rice in direct-seeded rice using the clearfield production system in Malaysia. , 2011 .

[25]  Muhammad Ansar,et al.  Allelopathic effects of sunflower water extract on weed control and wheat productivity. , 2009 .

[26]  Davis,et al.  Approaches for Improving Crop Competitiveness Through the Manipulation of Fertilization Strategies , 1995 .

[27]  Thomas Bak,et al.  The Effect of Laser Treatment as a Weed Control Method , 2006 .

[28]  Stephen D. Miller,et al.  Fertilizer placement affects jointed goatgrass (Aegilops cylindrica) competition in winter wheat (Triticum aestivum) , 1999 .

[29]  C. Mallory-Smith,et al.  Effect of Spring Tillage Sequence on Summer Annual Weeds in Vegetable Row Crop Rotations1 , 2006, Weed Technology.

[30]  K. Jabran,et al.  Lower doses of pendimethalin mixed with allelopathic crop water extracts for weed management in canola (Brassica napus). , 2010 .

[31]  A. DiTommaso,et al.  Weed composition and cover after three years of soil fertility management in the central Brazilian Amazon : Compost, fertilizer, manure and charcoal applications , 2005 .

[32]  Bhagirath S. Chauhan,et al.  The role of seed ecology in improving weed management strategies in the tropics , 2010 .

[33]  C. W. Lindwall,et al.  Tillage intensity and crop rotation affect weed community dynamics in a winter wheat cropping system , 2001 .

[34]  S. Snapp,et al.  Hairy Vetch Varieties and Bi‐Cultures Influence Cover Crop Services in Strip‐Tilled Sweet Corn , 2012 .

[35]  M. Julien,et al.  Water Hyacinth , 2019, Encyclopedia of Biological Invasions.

[36]  Susan L. Ustin,et al.  Identification of invasive vegetation using hyperspectral remote sensing in the California Delta ecosystem , 2008 .

[37]  M. Horowitz,et al.  Solarization for Weed Control , 1983, Weed Science.

[38]  F. E. LaMastus,et al.  Using remote sensing to detect weed infestations in Glycine max , 2000, Weed Science.

[39]  E. Blankenship,et al.  Nitrogen application influences the critical period for weed control in corn , 2003, Weed Science.

[40]  H. Janzen,et al.  Nitrogen fertilizer timing and application method affect weed growth and competition with spring wheat , 2004, Weed Science.

[41]  J. Streibig,et al.  The effect of ultraviolet radiation on the fresh weight of some weeds and crops , 1999 .

[42]  Esmaeil S. Nadimi,et al.  Site‐specific weed control technologies , 2009 .

[43]  B. Chauhan.  Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia , 2012, Weed Technology.

[44]  Wesley F. Buchele,et al.  Field Experiments with an Air-Curtain Flame Weeder , 1969 .

[45]  S. Knezevic,et al.  Potential new tool for weed control in organically grown agronomic crops , 2007 .

[46]  Nicolas Munier-Jolain,et al.  Weed seed predation increases with vegetation cover in perennial forage crops , 2010 .

[47]  H. Ghosheh.  Constraints in implementing biological weed control: A review , 2005 .

[48]  Matt Liebman,et al.  Seasonal patterns in post-dispersal seed predation of Abutilon theophrasti and Setaria faberi in three cropping systems , 2006 .

[49]  F. López-Granados,et al.  Configuration and Specifications of an Unmanned Aerial Vehicle (UAV) for Early Site Specific Weed Management , 2013, PloS one.

[50]  Erin R. Haramoto,et al.  Weed Ecology and Nonchemical Management under Strip-Tillage: Implications for Northern U.S. Vegetable Cropping Systems , 2013 .

[51]  S. Padgette,et al.  Glyphosate-resistant crops: adoption, use and future considerations. , 2008, Pest management science.

[52]  D. Landis,et al.  Feeding Preferences of Weed Seed Predators and Effect on Weed Emergence , 2007, Weed Science.

[53]  James L. Beck,et al.  Sensor-Controlled Hooded Sprayer for Row Crops' , 1998 .

[54]  Stephen B. Powles,et al.  Targeting Weed Seeds In-Crop: A New Weed Control Paradigm for Global Agriculture , 2013, Weed Technology.

[55]  S. Anjum,et al.  Impact of fertilizer use on weed management in conservation agriculture - a review. , 2014 .

[56]  Controlling Grass Weeds on Hard Surfaces: Effect of Time Intervals between Flame Treatments , 2012 .

[57]  A. Bajwa.  Sustainable weed management in conservation agriculture , 2014 .

[58]  P. Tranel,et al.  A common ragweed population resistant to cloransulam-methyl , 2001, Weed Science.

[59]  Lamb,et al.  Evaluating the accuracy of mapping weeds in fallow fields using airborne digital imaging: Panicumeffusum in oilseed rape stubble , 1998 .

[60]  Lei Tian,et al.  Development of a low-cost agricultural remote sensing system based on an autonomous unmanned aerial vehicle (UAV) , 2011 .

[61]  David C. Slaughter,et al.  Autonomous robotic weed control systems: A review , 2008 .

[62]  A. Moore,et al.  Effects of tillage system and nitrogen supply on sugarbeet production , 2012 .

[63]  A. Khaliq,et al.  Use of sorghum allelopathic properties to control weeds in irrigated wheat in a semi arid region of Punjab , 2000 .

[64]  Stephen L. Young.  True integrated weed management , 2012 .

[65]  F. López-Granados,et al.  Weed Mapping in Early-Season Maize Fields Using Object-Based Analysis of Unmanned Aerial Vehicle (UAV) Images , 2013, PloS one.

[66]  Daoji Li,et al.  Study of the spectral mixture model of soil and vegetation in PoYang Lake area, China , 1998 .

[67]  C. Swanton,et al.  Nitrogen management will influence threshold values of green foxtail (Setaria viridis) in corn , 2003, Weed Science.

[68]  B. Courtois,et al.  Quantitative Trait Loci Analysis of Allelopathy in Rice , 2008 .

[69]  N. Camp,et al.  Quantitative Trait Loci , 2002 .

[70]  Muhammad Farooq,et al.  The role of allelopathy in agricultural pest management. , 2011, Pest management science.

[71]  M. Worthington,et al.  Breeding Cereal Crops for Enhanced Weed Suppression: Optimizing Allelopathy and Competitive Ability , 2013, Journal of Chemical Ecology.

[72]  J. Everitt,et al.  Using Remote Sensing to Distinguish Common (Isocoma coronopifolia) and Drummond Goldenweed (Isocoma drummondii) , 1992, Weed Science.

[73]  Graham Brodie,et al.  Microwave Technologies as Part of an Integrated Weed Management Strategy: A Review , 2012 .

[74]  J. Everitt,et al.  Canopy Light Reflectance and Remote Sensing of Shin Oak (Quercus havardii) and Associated Vegetation , 1993, Weed Science.

[75]  D. Landis,et al.  Gryllus pennsylvanicus (Orthoptera: Gryllidae): Laboratory Weed Seed Predation and Within Field Activity-Density , 1999 .

[76]  Richard G. Smith,et al.  Navigating a Critical Juncture for Sustainable Weed Management , 2012 .

[77]  Wayne Woldt,et al.  Future Directions for Automated Weed Management in Precision Agriculture , 2014 .

[78]  D. Clements,et al.  Tillage Effects on Weed Seed Return and Seedbank Composition , 1996, Weed Science.

[79]  Bo Melander.  Interactions between Soil Cultivation in Darkness, Flaming and Brush Weeding When Used for In-Row Weed Control in Vegetables , 1998 .

[80]  C. Preston,et al.  Tillage system effects on weed ecology, herbicide activity and persistence: a review , 2006 .

[81]  D. Clements,et al.  Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation , 2006, Weed Science.

[82]  J. V. Stafford,et al.  Implementing precision agriculture in the 21st century. , 2000 .

[83]  Stephen B. Powles,et al.  Glyphosate-Resistant Crops and Weeds: Now and in the Future , 2009 .

[84]  Case R. Medlin,et al.  Economic comparison of broadcast and site-specific herbicide applications in nontransgenic and glyphosate-tolerant Glycine max , 2000, Weed Science.

[85]  B. Maxwell,et al.  Simulation of Spring-Seeded Smother Plants for Weed Control in Corn (Zea mays) , 1994, Weed Science.

[86]  Functional analysis of embolism induced by air injection in Acer rubrum and Salix nigra , 2013, Front. Plant Sci..

[87]  J. Ascard,et al.  Effects of flame weeding on weed species at different developmental stages. , 1995 .

[88]  R. Qureshi,et al.  Tagetes minuta L., A USEFUL UNDERUTILIZED PLANT OF FAMILY ASTERACEAE: A REVIEW , 2013 .

[89]  Erin R. Haramoto,et al.  Strip tillage and oat cover crops increase soil moisture and influence N mineralization patterns in cabbage , 2012 .

[90]  I. Sartorato,et al.  Observations on the potential of microwaves for weed control , 2006 .

[91]  L. Morin,et al.  Constraints in the Development of Bioherbicides , 1995, Weed Technology.

[92]  Chunhua Zhang,et al.  The application of small unmanned aerial systems for precision agriculture: a review , 2012, Precision Agriculture.

[93]  Leslie A. Weston,et al.  Weed and Crop Allelopathy , 2003 .

[94]  R. Kohli,et al.  Allelopathic Interactions and Allelochemicals: New Possibilities for Sustainable Weed Management , 2003 .

[95]  A. C. Grundy,et al.  Non‐chemical weed management in organic farming systems , 2001 .

[96]  Nancy F. Glenn,et al.  A review of remote sensing of invasive weeds and example of the early detection of spotted knapweed (Centaurea maculosa) and babysbreath (Gypsophila paniculata) with a hyperspectral sensor , 2005, Weed Science.

[97]  H. Søgaard.  Weed Classification by Active Shape Models , 2005 .

[98]  Lucia Stigliani,et al.  SELOMA: Expert System for Weed Management in Herbicide-Intensive Crops , 1993, Weed Technology.

[99]  R. Bellinder,et al.  Alternative tillage and herbicide options for successful weed control in vegetables , 1992 .

[100]  Qin Zhang,et al.  A Stereovision-based Crop Row Detection Method for Tractor-automated Guidance , 2005 .

[101]  M. Entz,et al.  Chaff collection reduces seed dispersal of wild oat (Avena fatua) by a combine harvester , 2005, Weed Science.

[102]  Alessandro Matese,et al.  A flexible unmanned aerial vehicle for precision agriculture , 2012, Precision Agriculture.

[103]  D. Mortensen,et al.  Effect of Soil Disturbance on Annual Weed Emergence in the Northeastern United States1 , 2005, Weed Technology.

[104]  M. Arshad,et al.  Weed flora in the early growth period of spring crops under conventional, reduced, and zero tillage systems on a clay soil in northern Alberta, Canada , 1995 .

[105]  M. Weaver,et al.  Myrothecium verrucariu fungus: a bioherbicide and strategies to reduce its non-target risks , 2007 .

[106]  S. Warwick,et al.  A decade of herbicide-resistant crops in Canada , 2006 .

[107]  David Lamb,et al.  PA—Precision Agriculture: Remote-Sensing and Mapping of Weeds in Crops , 2001 .

[108]  J. Rutger,et al.  Gene Flow Between Red Rice (Oryza sativa) and Herbicide-Resistant Rice (O. sativa): Implications for Weed Management1 , 2003, Weed Technology.

[109]  Bhagirath S. Chauhan,et al.  Ecology and management of weeds under conservation agriculture: A review , 2012 .

[110]  C. Kempenaar,et al.  Opportunities for biological weed control in Europe , 2001, BioControl.

[111]  Marcus J. Byrne,et al.  Economic evaluation of the successful biological control of Azolla filiculoides in South Africa , 2003 .

[112]  J. Astwood,et al.  The composition of grain and forage from glyphosate tolerant wheat MON 71800 is equivalent to that of conventional wheat (Triticum aestivum L.). , 2004, Journal of agricultural and food chemistry.

[113]  Stephen B. Powles,et al.  Harrington Seed Destructor: A New Nonchemical Weed Control Tool for Global Grain Crops , 2012 .

[114]  David C. Slaughter,et al.  PULSED-JET MICROSPRAY APPLICATIONS FOR HIGH SPATIAL RESOLUTION OF DEPOSITION ON BIOLOGICAL TARGETS , 2004 .

[115]  David C. Slaughter,et al.  HERBICIDE MICRO-DOSING FOR WEED CONTROL IN FIELD-GROWN PROCESSING TOMATOES , 2004 .

[116]  I. M. Scotford,et al.  Applications of Spectral Reflectance Techniques in Northern European Cereal Production: A Review , 2005 .

[117]  José Blasco,et al.  AE—Automation and Emerging Technologies: Robotic Weed Control using Machine Vision , 2002 .

[118]  A. Rehman,et al.  Application of sorghum, sunflower and rice water extract combinations helps in reducing herbicide dose for weed management in rice. , 2010 .

[119]  J. Iqbal,et al.  Intercropping of field crops in cotton for the management of purple nutsedge (Cyperus rotundus L.) , 2007, Plant and Soil.

[120]  Albert-Jan Baerveldt,et al.  An Agricultural Mobile Robot with Vision-Based Perception for Mechanical Weed Control , 2002, Auton. Robots.

[121]  L. Tian,et al.  A Review on Remote Sensing of Weeds in Agriculture , 2004, Precision Agriculture.

[122]  S. Hallett.  Where are the bioherbicides? , 2005, Weed Science.

[123]  J. Ascard,et al.  Dose–response models for flame weeding in relation to plant size and density , 1994 .

[124]  Micheal D. K. Owen,et al.  Survey of Tillage Trends Following The Adoption of Glyphosate-Resistant Crops , 2009, Weed Technology.

[125]  Sakine Ozpinar.  Effects of tillage systems on weed population and economics for winter wheat production under the Mediterranean dryland conditions , 2006 .

[126]  J. Ditomaso,et al.  Instability in a grassland community after the control of yellow starthistle (Centaurea solstitialis) with prescribed burning , 2002, Weed Science.

[127]  Lawrence W. Lass,et al.  Detection of Yellow Starthistle (Centaurea solstitialis) and Common St. Johnswort (Hypericum perforatum) with Multispectral Digital Imagery , 1996, Weed Technology.

[128]  A. Davis,et al.  Effect of Fertilizer Nitrogen on Weed Emergence and Growth , 2008, Weed Science.

[129]  C. J. McGrath,et al.  Effect of exchange rate return on volatility spill-over across trading regions , 2012 .

[130]  R. Blackshaw.  Nitrogen Fertilizer, Manure, and Compost Effects on Weed Growth and Competition with Spring Wheat , 2005 .

[131]  D. C. Slaughter,et al.  Vision Guided Precision Cultivation , 1999, Precision Agriculture.

[132]  Lisa J. Rew,et al.  Spatial distribution of weeds in arable crops: are current sampling and analytical methods appropriate? , 2001 .

[133]  Bhagirath S. Chauhan,et al.  Ecologically Based Weed Management Strategies , 2014 .

[134]  C. W. Lindwall,et al.  Factors affecting the operation of the weed-sensing Detectspray system , 1998, Weed Science.

[135]  Muhammad Farooq,et al.  Application of allelopathy in crop production , 2013 .

[136]  M. Walsh,et al.  Burning narrow windrows for weed seed destruction , 2007 .

[137]  Scott M. Swinton,et al.  GWM: General Weed Management Model , 1996 .

[138]  Lawrence W. Lass,et al.  The Effect of Phenological Stage on Detectability of Yellow Hawkweed (Hieracium pratense) and Oxeye Daisy (Chrysanthemum leucanthemum) with Remote Multispectral Digital Imagery , 1997 .

[139]  A. Nawaz,et al.  Role of Allelopathy in Weed Management , 2014 .

[140]  Svend Christensen,et al.  A decision algorithm for patch spraying , 2003 .

[141]  J. Ascard,et al.  Influence of developmental stage and time of assessment on hot water weed control , 2002 .

[142]  Jerry M. Green.  The benefits of herbicide-resistant crops. , 2012, Pest management science.

[143]  A. J. Richardson,et al.  Light Reflectance and Remote Sensing of Weeds in Agronomic and Horticultural Crops , 1985, Weed science.

[144]  Bhagirath S. Chauhan,et al.  Strategies to manage weedy rice in Asia , 2013 .

[145]  E. Khan,et al.  Application of bio-herbicide alternatives for chemical weed control in rice. , 2011 .

[146]  J. Pratley,et al.  Quantitative trait loci and molecular markers associated with wheat allelopathy , 2003, Theoretical and Applied Genetics.

[147]  Stephen B. Powles,et al.  Management Strategies for Herbicide-resistant Weed Populations in Australian Dryland Crop Production Systems , 2007, Weed Technology.

[148]  K. A. McLean.  Chemical thinning of sugar beet , 1969 .

[149]  I. Heap,et al.  Herbicide Resistant Weeds , 2019, EDIS.

[150]  Robert L. Zimdahl,et al.  Fundamentals of Weed Science , 1993 .

[151]  R. Hoagland.  Chemical Interactions with Bioherbicides to Improve Efficacy , 1996, Weed Technology.

[152]  Francisca López-Granados,et al.  Weed detection for site-specific weed management: mapping and real-time approaches , 2011 .

[153]  A. Dinoor,et al.  Biological control of weeds using plant pathogens: accomplishments and limitations , 2000 .

[154]  D. Warncke,et al.  Fertilizer and Population Affects Nitrogen Assimilation of Common Lambsquarters (Chenopodium album) and Redroot Pigweed (Amaranthus retroflexus) , 2013 .

[155]  Lon R. Cardon,et al.  Quantitative Trait Loci , 1995 .

[156]  Prabhjyot-Kaur,et al.  Global Warming and Its Possible Impact on Agriculture in India , 2014 .

[157]  S.W.R. Cox,et al.  Electro-chemical thinning of sugar beet , 1969 .

[158]  Joseph T. Dauer,et al.  Impact of agricultural management on carabid communities and weed seed predation , 2007 .

[159]  L. Gianessi.  Economic and herbicide use impacts of glyphosate-resistant crops. , 2005, Pest management science.

[160]  S. Christensen,et al.  Real‐time weed detection, decision making and patch spraying in maize, sugarbeet, winter wheat and winter barley , 2003 .

[161]  M. Miller,et al.  Effect of Soil Solarization, Cover Crops, and Metham on Field Emergence and Survival of Buried Annual Bluegrass (Poa annua) Seeds1 , 2001, Weed Technology.

[162]  P. Banik,et al.  Wheat and chickpea intercropping systems in an additive series experiment: Advantages and weed smothering , 2006 .

[163]  T. Day,et al.  Penetration of UV‐B radiation in foliage: evidence that the epidermis behaves as a non‐uniform filter , 1993 .

[164]  James H. Everitt,et al.  Using Satellite Data to Map False Broomweed (Ericameria austrotexana) Infestations on South Texas Rangelands , 1993, Weed Technology.

[165]  R. Kohli,et al.  Potential utilization of dried powder of Tagetes minuta as a natural herbicide for managing rice weeds , 2007 .

[166]  I. Khan.  WEED MANAGEMENT IN SUNFLOWER WITH ALLELOPATHIC WATER EXTRACT AND REDUCED DOSES OF A HERBICIDE Inayat Ullah Awan 1 , Mohammad Azam Khan, Muhammad Zareef and Ejaz Ahmad Khan , 2009 .

[167]  A. Tanveer,et al.  ORGANIC WEED MANAGEMENT IN MAIZE (Zea mays L.) THROUGH INTEGRATION OF ALLELOPATHIC CROP RESIDUES , 2010 .

[168]  C. L. Mohler,et al.  Evaluation of Mechanical Weed Management Programs for Corn (Zea mays) , 1997, Weed Technology.

[169]  T. Horiuchi,et al.  Finger millet (Eleucine corocana L. Gaertn.) as a cover crop on weed control, growth and yield of soybean under different tillage systems , 2006 .

[170]  S. Saeed,et al.  Weed Control in Maize (Zea mays L.) Through Sorghum Allelopathy , 2004 .

[171]  R. Charudattan,et al.  Biological control of weeds by means of plant pathogens: Significance for integrated weed management in modern agro-ecology , 2001, BioControl.

[172]  J. C. Price.  How unique are spectral signatures , 1994 .

[173]  S. Parish,et al.  A Review of Non-Chemical Weed Control Techniques , 1990 .

[174]  S. Sadia,et al.  Influence of combinations of allelopathic water extracts of different plants on wheat and wild oat. , 2013 .

[175]  Samunder Singh.  Sustainable weed management in cotton , 2014 .

[176]  J. Pratley,et al.  Laboratory screening for allelopathic potential of wheat (Triticum aestivum) accessions against annual ryegrass (Lolium rigidum) , 2000 .

[177]  G. Ash.  The science, art and business of successful bioherbicides , 2010 .

[178]  R. A. C. Harudattan.  USE OF PLANT PATHOGENS AS BIOHERBICIDES TO MANAGE WEEDS IN HORTICULTURAL CROPS , 2005 .

[179]  Francisca López Granados.  Weed detection for site-specific weed management: Mapping and real-time approaches , 2011 .

[180]  J. Iqbal,et al.  Allelopathic Crop Water Extracts Reduce the Herbicide Dose for Weed Control in Cotton (Gossypium hirsutum) , 2009 .

[181]  W. S. Lee,et al.  Robotic Weed Control System for Tomatoes , 2004, Precision Agriculture.

[182]  S. J. Watson,et al.  Post‐dispersal seed predation of non‐target weeds in arable crops , 2005 .

[183]  M. Farooq,et al.  Application of Allelopathy in Crop Production: Success Story from Pakistan , 2013 .

[184]  A. K. Srivastva,et al.  Soil aggregation and organic matter in a sandy clay loam soil of the Indian Himalayas under different tillage and crop regimes , 2009 .

[185]  M. Owen,et al.  Herbicide-resistant crops and weed resistance to herbicides. , 2005, Pest management science.

[186]  Samunder Singh.  Role of Management Practices on Control of Isoproturon-resistant Littleseed Canarygrass (Phalaris Minor) in India , 2007, Weed Technology.

[187]  M. Haidar,et al.  Soil solarization and chicken manure for the control of Orobanche crenata and other weeds in Lebanon , 2000 .

[188]  M. Ashworth,et al.  Increased Carrier Volume Improves Preemergence Control of Rigid Ryegrass (Lolium rigidum) in Zero-Tillage Seeding Systems , 2013, Weed Technology.

[190]  Philip A. Stephens,et al.  Predictive models of weed population dynamics , 2009 .

[191]  A. Oyanagi,et al.  Effects of winter barley as a cover crop on the weed vegetation in a no‐tillage soybean , 2004 .

[192]  S. Gomáriz,et al.  Fine-scale bird monitoring from light unmanned aircraft systems , 2012 .

[193]  R. S. Chhokar,et al.  Effect of tillage and herbicides on weeds and productivity of wheat under rice–wheat growing system , 2007 .

[194]  Joachim Reuder,et al.  Atmospheric profiling with the UAS SUMO: a new perspective for the evaluation of fine-scale atmospheric models , 2012, Meteorology and Atmospheric Physics.

[195]  J. Camberato,et al.  Starter Fertilizer Effects On Cotton Development And Weed Interference , 2004 .

[196]  J. Dille,et al.  Corn and Palmer amaranth (Amaranthus palmeri) Interactions with Nitrogen in Dryland and Irrigated Environments , 2013, Weed Science.

[197]  J. Andersen.  Experimental trials and modelling of hydrogen and propane burners for use in selective flaming , 1997 .