Open Access. Powered by Scholars. Published by Universities.®

Agronomy and Crop Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1951 - 1980 of 16391

Full-Text Articles in Agronomy and Crop Sciences

Leaf Growth In Lolium Perenne L., H Schnyder, S Seo, W Kuhbauch Apr 2025

Leaf Growth In Lolium Perenne L., H Schnyder, S Seo, W Kuhbauch

IGC Proceedings (1977-2023)

Knowledge about the spatial distribution of growth rates within the growth zone of leaves is essential for the study of metabolism associated with the growth process (Silk 1984). Such data have been described for Festuca arundinacea Schreb. during the phase of rapid blade elongation (Schnyder and Nelson 1987, 1988) and Zea mays L. during one developmental stage (Hsiao et al. 1985). No developmental studies appear to have been made. This paper describes the spatial distribution of growth rates within the elongation zone of L. perenne leaves from shortly after tip emergence to shortly before cessation of leaf growth. Special …

Go to article

Analysis Of The Aerial Part And Roots Of The Lucerne Crop To Improve The Breeding Method, P Rotili, L Zannone, G Gnocchi, S Proietti, C Scotti Apr 2025

Analysis Of The Aerial Part And Roots Of The Lucerne Crop To Improve The Breeding Method, P Rotili, L Zannone, G Gnocchi, S Proietti, C Scotti

IGC Proceedings (1977-2023)

In our research work we consider the lucerne crop as a « system», that means a set of elements with their reciprocal relationships (Rotili 1988). The elements of such a system are the plants ; the whole of their relationships is called the « structure » of the system ; it is expressed by the effects caused by the reciprocal interference among the plants on their mor­phology and physiology. Both these constituents of the system (the plants and the structure) have to be considered by the breeder to improve the lucerne crop. From some hundred experiments established with material genetically …

Go to article

Relationship Of Leaf Export Of Carbohydrate To Rhizomatous Growth In Panicum Amarum L., D S. Fisher, J C. Burns, D H. Timothy, K R. Pond Apr 2025

Relationship Of Leaf Export Of Carbohydrate To Rhizomatous Growth In Panicum Amarum L., D S. Fisher, J C. Burns, D H. Timothy, K R. Pond

IGC Proceedings (1977-2023)

Rhizomatous growth is desirable in pastures, yet many species used for grazing have exceedingly short rhizomes. In damaged pastures, vigorous rhizomes can provide for recovery of areas in which the stand has been lost. In breeding pasture grasses, selecting for high yields in a favorable environment may result in altered partitioning of carbohydrate between shoots and roots to favor above ground growth. In the Panicum genus, this can occur even in spaced plantings in which plants may exceed 2 m in height. The following experiment utilized a high rhizome (HR), an intermediate rhizome (IR), and a low rhizome (LR) accession …

Go to article

Morphological And Physiological Growth Aspects Of Three Tropical Grasses, J A. Gomide Apr 2025

Morphological And Physiological Growth Aspects Of Three Tropical Grasses, J A. Gomide

IGC Proceedings (1977-2023)

Forage plants differ considerably regarding their ability to recover from grazing. Forage regrowth is determined by shoot apex survival (Sheard and Winch, 1966); leaf area (Ward and Blaser, 1961) ; non-structural carbohydrate content (Ward and Blaser, 1961 ; Brown and Blaser, 1965) and tillering potential (Paulsen and Smith, 1969). Little is known about these concepts regarding tropical grasses.

Go to article

The Morphological Relation In The Panicle Of Panicum Maximum Jacq. Consequences On The Pollination And The Fertility, M Noirot Apr 2025

The Morphological Relation In The Panicle Of Panicum Maximum Jacq. Consequences On The Pollination And The Fertility, M Noirot

IGC Proceedings (1977-2023)

In Panicum maximum, the fertility is often low : 9 to 40 % (Warmke, 1951; Javier, 1970). At the Agricultural station of Man (Ivory Coast) - a limit region for natural dispersion of guinea grass -, the same amplitude has been noted. But our observations showed a negative correlation between fertility and panicle length. The study of the spikelet distribution into the sheathed panicle and its factors of variability bring an answer to explain this phenomenon.

Go to article

Phytochrome Mediated Effects On White Clover Morphogenesis, C Varlet-Grancher, B Moulia, R Jacques Apr 2025

Phytochrome Mediated Effects On White Clover Morphogenesis, C Varlet-Grancher, B Moulia, R Jacques

IGC Proceedings (1977-2023)

The balance of a white clover-grass mixture mostly depends on the morphogenesis of white clover under conditions of compe­tition for light (Beinhart, 1963 ; Gastal et al., 1986). Within the recent years, emphasis has been placed on the role of phytochrome as a shade sensor and as a controlling system for the morphogen­esis of light-grown higher plants (Morgan and Smith, 1979). To our knowledge there is only one report on white clover photomorphogenesis available in the literature. This work (Solan­garrachchi and Harper, 1987) deals with the effect of chlorophyl­lian shade on morphogenesis and the effects obtained are some­times contradictory within …

Go to article

White Clover Root Systems And Their Influence On The Survival Of Perennial Pastures In South Africa, A Smith, D.C W. Goodenough, A.R J. Morrison, Marie F. Smith Apr 2025

White Clover Root Systems And Their Influence On The Survival Of Perennial Pastures In South Africa, A Smith, D.C W. Goodenough, A.R J. Morrison, Marie F. Smith

IGC Proceedings (1977-2023)

The eastern part of the Republic of South Africa receives a relatively high rainfall, which results in it having a high agricul­tural potential. The quality of natural and cultivated pastures can be vastly improved by the introduction of a legume component. In the areas where pastures are likely to develop, the soils are acid and highly leached. White clover is not normally tolerant of low P, low Ca and high Al soil contents, and due to its nor­mally shallow rooting habit it consequently suffers easily from drought conditions, and therefore has a much reduced pro­ductive period of approximately 30 months …

Go to article

Effect Of Interspecific Competition On The Development And Early Growth Of Grass Species, U R. Sangakkara, E Roberts Apr 2025

Effect Of Interspecific Competition On The Development And Early Growth Of Grass Species, U R. Sangakkara, E Roberts

IGC Proceedings (1977-2023)

In a sown pasture, each individual plant tries to gain access to growth resources for its establisment and development. The more competitive species, which generally exhibits more exten­sive seedling growth obtains a greater share of resources, thus modifying the environment within the plant community (Black, 1966). This develops competitive relationships. As competition operates essentially at the individual plant level (Rhodes, 1970), experiments need to study the effect of neighbouring species on the growth and development of a single plant (Mead, 1979). Studies on competition between ryegrass (Lolium perenne), prairiegrass (Bromus catharticus) and cocksfoot (Dactylis glomerata …

Go to article

Azote Et Equilibre De L’Association Ray-Grass Anglias-Trefle Blanc, J C. Simon Apr 2025

Azote Et Equilibre De L’Association Ray-Grass Anglias-Trefle Blanc, J C. Simon

IGC Proceedings (1977-2023)

Bon nombre d'eleveurs s'interrogent sur l'interet des apports d'azote sur les associations ray-grass anglais - trefle blanc, en particulier sur la premiere pousse de printemps. Ces apports conduisent generalement a un desequilibre de !'association en faveur du ray-grass et compromettent de ce fait la perennite du melange. Apres avoir rappele brievement par quelques resultats experimentaux les principales incidences de l'azote sur le niveau de production et sur la composition de la culture mixte, nous analyserons les effets de l'azote sur l'equilibre de !'association a la lumiere des donnees recentes sur la morphogenese des deux plantes.

Go to article

The Effects Of Coconut Palms On Pasture Understory, R W. Snaydon, D.N S. Fernando, R Sangakkara Apr 2025

The Effects Of Coconut Palms On Pasture Understory, R W. Snaydon, D.N S. Fernando, R Sangakkara

IGC Proceedings (1977-2023)

Pastures are extensively grown under coconut palms, and mainly grazed by cattle (Plucknett, 1979). The main advantages of this form of mixed cropping are : (a) diversification of products, (b) additional income, (c) feed for draft animals, (d) weed control, and (e) more rapid nutrient cycling. Surprisingly little information is available on the effects of pastures and coconut palms on each other (Plucknett, 1979) ; even less is known about the mechanisms of competition between them. This study was designed to study the effects of coconut palms on pasture. A trenching technique was used to investigate the effects of below-ground …

Go to article

Compatibility Of Birdsfoot Trefoil With Tall Fescue Selected For High And Low Leaf Area Expansion Rate, C J. Nelson, K M. Hasson, D A. Sleper, J R. Forwood Apr 2025

Compatibility Of Birdsfoot Trefoil With Tall Fescue Selected For High And Low Leaf Area Expansion Rate, C J. Nelson, K M. Hasson, D A. Sleper, J R. Forwood

IGC Proceedings (1977-2023)

Tall fescue (Festuca arundinacea Schreb.) populations were selected for slow and rapid leaf area expansion rate (Nelson and Sleper, 1983). Daily leaf elongation rate (LER) in the field was increased by 0.30 mm and decreased by 0.53 mm per gener­ation (Nelson et al., 1985), but single-leaf photosynthesis was not affected. Populations selected for high LER had longer and wider leaf blades (Nelson and Sleper, 1983), and lower tiller density, higher weight per tiller, and higher forage yield in veg­etative swards (Nelson et al., 1985) than those selected for slow LER. Zarrough et al. (1983) suggested that tall fescue could …

Go to article

Determination Of Predictive Zones For The Evaluation Of Herbage Grasses In Cuba, J Gerardo, Hilda Machado, Verena Torres Apr 2025

Determination Of Predictive Zones For The Evaluation Of Herbage Grasses In Cuba, J Gerardo, Hilda Machado, Verena Torres

IGC Proceedings (1977-2023)

Regional studies that evolve a high quantity of environment are made nowadays in order to define the behaviour of a geno­type in different environments, but the workers of introduction programmes can not prove their varieties in all environments. Therefore, it is necessary to select a wide range to represent production conditions. This topic has been studied by several writers (Rambling et al., 1980; Brown et al., 1983). The objec­tive of our study is to reduce test sites due to the high source in income needed in these studies.

Go to article

Varieties Evaluation Of Lucerne (Medicago Sativa) With Different Winter Dormancy Class, O A. Bruno, R J. Leon, L A. Romero, O R. Quaino Apr 2025

Varieties Evaluation Of Lucerne (Medicago Sativa) With Different Winter Dormancy Class, O A. Bruno, R J. Leon, L A. Romero, O R. Quaino

IGC Proceedings (1977-2023)

Lucerne, pure or as a component of mixtures, is the forage more used in many regions of Argentine. In the central part of Santa Fe province it is the basis of feeding in the milk pro­duction systems. The diffusion of this species was done by mean of popula­tions, that at the beginning of this century produced forage of high yield, quality and good persistency. Later, the area ofland cultivated fluctuated, characterized by periods of diminishing and recovery. From 1969 the appearance of Pea aphid (Acyr­thosiphum pisum) gave rise to a critical situation. The solution to this problem was …

Go to article

L’Effet Du Climat Sur La Production Des Herbages, I Vinczeffy Apr 2025

L’Effet Du Climat Sur La Production Des Herbages, I Vinczeffy

IGC Proceedings (1977-2023)

Dans les regions arides on peut optimiser la production des herbages par une technologie adaptee au climat, meme dans des sols pauvres. Le climat de la Hongrie est en grande partie sec, Jes sols des herbages sont defavorables, la vegetation est degra­dee et l'effet des engrais est modere. Le rapport entre le climat et la production est presente par Jes donnees du ne traitement d'une experience de 9 ans.

Go to article

Effects Of Temperature And Photoperiod On The Extension Growth Of Six Temperate Grasses, G.A Van Esbroeck, Jane R. King, V S. Baron Apr 2025

Effects Of Temperature And Photoperiod On The Extension Growth Of Six Temperate Grasses, G.A Van Esbroeck, Jane R. King, V S. Baron

IGC Proceedings (1977-2023)

In western Canada late season pasture yields vary consider­ably among species. During August and early September yields of Bromus riparius and Dactylis glomerata are double that of the more commonly grown Bromus inermis (Knowles and Sonmore, 1985). The importance of leaf area to crop growth rate pnor to canopy closure is well documented (Rhodes, 1973). Two components of leaf area are the final size of leaves and the rate of leaf appearance, with final size of leaves largely dependant on the rate of extension and duration of extension (Edwards, 1967). Since the maturity of a leaf is closely associ­ated with …

Go to article

C-4 Grass With Legumes: An Energy Efficient Biomass System, C J. Kaiser Apr 2025

C-4 Grass With Legumes: An Energy Efficient Biomass System, C J. Kaiser

IGC Proceedings (1977-2023)

Converting solar energy into biomass is theoretically most energy efficient when species of a high photosynthetic capacity are grown and nitrogen is furnished via symbiotic fixation. Per­ennial warm season grasses with the C-4 photosynthetic path­way outyield perennial cool season grasses that possess less efficient C-3 pathways. Growing a productive perennial warm season grass in sequence with a winter annual legume should increase yearly capture of solar energy per unit area. The different seasonal growth patterns of the winter legume and the C-4 grass should result in less inter-species competition than occurs in traditional cool season grass-legume combinations. As a result, …

Go to article

Preliminary Rate Of Growth Curves For Legume Based Improved Pastures In The Mid-Altitude Region Of Yunnan Province Of Southern China, J R. Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin Apr 2025

Preliminary Rate Of Growth Curves For Legume Based Improved Pastures In The Mid-Altitude Region Of Yunnan Province Of Southern China, J R. Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin

IGC Proceedings (1977-2023)

Yunnan Province in south west China is very mountainous and has several major climatic/ecological zones ranging from tropical to alpine but all are dominated by the south Asian monsoonal rainy season. Extensive tracts of hilly depleted range lands occur in the mid-altitude zone (1800-2500 m) that are potentially suitable for developing to improved legume based pastures. Results of investigations as to suitable species and appropriate fertilizers for this purpose have been discussed previously (Mathison et al., 1985 and Wang et al., 1985). The Project has succesfully established model farms at several places throughout the Province and these carry reasonably pro­ductive …

Go to article

Effects Of Low Temperature On Germination Of Herbage Species Used In New Zealand, J.F L. Charlton, J G. Hampton Apr 2025

Effects Of Low Temperature On Germination Of Herbage Species Used In New Zealand, J.F L. Charlton, J G. Hampton

IGC Proceedings (1977-2023)

In recent years, New Zealand's grassland industry has been diversified by the farming of different livestock types, and by using a wider range of pasture species. Some of the latter have establishment and growth patterns very different from the herbage species perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.), used traditionally by New Zealand farmers. Successful seedling establishment is critical for subsequent successful performance in a pasture. Quality of herbage seed is judged by thousand seed weight, analytical purity, freedom from undesirable weed seed contamination, and high germi­nation capacity. Internationally accepted procedures are used to …

Go to article

Spanish Subclover Ecotypes: Evaluation Under Grazing, L Olea, C Bueno, J Paredes, P Verdasco Apr 2025

Spanish Subclover Ecotypes: Evaluation Under Grazing, L Olea, C Bueno, J Paredes, P Verdasco

IGC Proceedings (1977-2023)

The introduction of australian subclover varieties in the mediterranean environments of Europe has had irregular results (Olea et al., 1985). For this reason, important projects in selection and genetic improvement of subclover varieties adapted to these environments are carried out in Spain, Portu­gal and Sardinia. The selection program used at Badajoz (Spain) has origi­nated ecotypes which have been described by Gomez Pitera (1985) and Gonzalez et al. (1986). These ecotypes have short cycles, high level of hardseedness, high seed production and long flowering period. The final stage in the selection of pasture plants must include the evaluation under grazing. Subclover …

Go to article

Behaviours Of Annual And Perennial Grass Species In The Same Genus, Y Takasaki, A Isoda, H Nojima, H Oizumi Apr 2025

Behaviours Of Annual And Perennial Grass Species In The Same Genus, Y Takasaki, A Isoda, H Nojima, H Oizumi

IGC Proceedings (1977-2023)

A genus including crop species usually has annual and peren­nial species. Although life history is genetically controlled, it is not fully investigated how it is expressed (Nooden, 1980; Woolhouse, 1982). We examined the behaviours of annuals and perennials in the genera Avena, Hordeum, Lolium and Oryza.

Go to article

Vegetative Growth And Development Of Norwegian Poa Pratensis L. Ecotypes As Influenced By Temperature And Photoperiod, T S. Aamlid Apr 2025

Vegetative Growth And Development Of Norwegian Poa Pratensis L. Ecotypes As Influenced By Temperature And Photoperiod, T S. Aamlid

IGC Proceedings (1977-2023)

Temperature and photoperiod are the main environmental factors affecting flower induction in Poa pratensis (Heide, 1980). As all tillers have a juvenile stage, seed yield depends on both number and size of tillers at the end of the previous growth season. Furthermore, most of the seeds are produced on aerial shoots from the rhizome system (Borg, 1974). Thus, the aim of the experiment was to examine the influence of tem­perature and photoperiod on growth and development of various ecotypes.

Go to article

Greenhouse Gas Emissions From Flood-Irrigated Rice As Affected By Phosphorus Fertilizer Source, Chandler M. Arel, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Richard Adams Apr 2025

Greenhouse Gas Emissions From Flood-Irrigated Rice As Affected By Phosphorus Fertilizer Source, Chandler M. Arel, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Richard Adams

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Research into alternative phosphorus (P) fertilizer sources that may be able to supplement P resources is necessary. Struvite (MgNH4PO4 · 6H2O) can be made by removing excess nutrients from waste sources and may reduce greenhouse gas (GHG) emissions from cropping systems. This study sought to quantify GHG [i.e., methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2)] fluxes, season-long emissions, and net GHG emissions from chemically precipitated struvite (CPST) and synthetic and real-wastewater-derived electrochemically precipitated struvite (ECST) compared to monoammonium phosphate (MAP) and an unamended control (UC) from flood-irrigated rice (Oryza sativa) grown in P-deficient, silt loam soil in a …

Go to article

Agronomic Performance And Stability Of Padjadjaran Hybrid Maize In Different Agroecosystems, Farhan Fadhillah, Fiky Yulianto Wicaksono, Yuyun Yuwariah, Dedi Ruswandi Apr 2025

Agronomic Performance And Stability Of Padjadjaran Hybrid Maize In Different Agroecosystems, Farhan Fadhillah, Fiky Yulianto Wicaksono, Yuyun Yuwariah, Dedi Ruswandi

Jurnal Kultivasi

The development of high-yielding hybrid maize is a strategic step to address global food demand amidst climate change. This study evaluates the agronomic performance of 14 maize genotypes—10 newly developed F1 hybrids and 4 commercial checks—under two planting densities (95,000 and 55,000 plants/ha) across three agroecosystems (lowland, midland, and highland). The objectives were to identify superior and adaptive genotypes and analyze genotype × environment interactions using AMMI and GGE biplot methods. Genotype G12 exhibited the highest yield (338.4 g/plant) at high density, especially in the highland, but showed poor stability. In contrast, G5 demonstrated consistent performance and stability across environments. …

Go to article

Herbicide Utilization For Regulation Of Botanical Composition Of Grass Swards, A Lackovic Apr 2025

Herbicide Utilization For Regulation Of Botanical Composition Of Grass Swards, A Lackovic

IGC Proceedings (1977-2023)

In Czechoslovak conditions especially in Slovakia the botan­ical composition of grass swards is for different reasons getting worse and this means the decrease of forage value. As all those swards cannot be improved by complete renovation or by direct strip drilling of productive species into the sward, other possibilities are looked for. One for those is the utilization of herbicides combined with adequate fertilization. Retardation or control of unfavourable species destroy the existing competition which causes the different species succession in the sward. Our aim was to make a positive succession of species in the sward by herbicides utilization and …

Go to article

Allelopathic Influence Of Certain Pasture Weeds, A E. Smith Apr 2025

Allelopathic Influence Of Certain Pasture Weeds, A E. Smith

IGC Proceedings (1977-2023)

Allelopathy, the direct or indirect effect of one plant on another through the production of chemical compounds that escape into the environment (Rice, 1974) occurs widely in natu­ral plant communities (Gressel and Holm, 1964), and is pos­tulated to be one mechanism by which weeds interfere with crop growth (Gressel and Holm, 1964; Bell and Koeppe, 1962; Muller, 1966). Probably the most significant consequence of allelopathy is the alteration of population densities that affect vegetation patterns in plant communities. The actual and potential roles of allelopathy in agriculture have been exten­sively reviewed (Putman and Duke, 1978; Rice, 1974; Rice, 1979). Generally, …

Go to article

Economics Of Controlling Weeds Of Permanent Pasture, I Popay, N Barlow Apr 2025

Economics Of Controlling Weeds Of Permanent Pasture, I Popay, N Barlow

IGC Proceedings (1977-2023)

In general, inedible weeds of permanent pasture reduce pas­ture dry matter available to stock in direct proportion to their cover (Doyle et al., 1984). Translating the effects of weeds on pasture to reductions in animal production is difficult because (i) pasture value can range from zero to the cost of purchased feed (ii) weed effects and pasture value can vary seasonally and interact and (iii) reductions in pasture availability at one time affect later growth (Auld et al., 1987). There have been few direct measurements of effects of pasture weeds on animal pro­ductivity, because of the co.sts involved. However, simulation …

Go to article

Weed Development In Tropical Sown Pastures, G.E D. Tiley Apr 2025

Weed Development In Tropical Sown Pastures, G.E D. Tiley

IGC Proceedings (1977-2023)

The use of artificially sown pastures is relatively recent in the tropics. Grasses and legumes have been evaluated for their value to livestock as well as the more traditional use of resting arable land after cropping. Using the criteria of ease of estab­lishment, production under grazing and botanical stability, a number of species and mixtures were recommended for the humid areas of Uganda (Horrell and Tiley, 1970). Control of weed growth during early establishment and suppression of unsown species subsequently were found to be vital for the success of these tropical ley pastures. The results of monitoring weed development in …

Go to article

Insect Pests As A Limiting Factor In Green Fodder Production In Lucerne, Their Control And Residual Persistence Of Insecticides, V J. Shivankar Apr 2025

Insect Pests As A Limiting Factor In Green Fodder Production In Lucerne, Their Control And Residual Persistence Of Insecticides, V J. Shivankar

IGC Proceedings (1977-2023)

The green fodder production in lucerne suffers serious loss of about 38 % caused by the insect pests like Empoasca sp., Therioaphis maculata Buck, Aphis craccivora Koch and Hypera variabilis Herbst. under the tropical agroclimatic zone of Bundelkhand-India (Shri Ram and Gupta, 1976). Of these H. variabilis is most serious with regular occurrence and world­wide distribution. No work has been reported on the control aspect of these pests in India, except a few on insecticidal evalu­ation (Shri Ram and Gupta, 1975) and the economic injury level of lucerne weevil (Gupta et al., 1982). Need of the studies on the chemical …

Go to article

Sitona Hispidulus Larvaw As A Stress On Alfalfa Production, A A. Hower, K T. Leath Apr 2025

Sitona Hispidulus Larvaw As A Stress On Alfalfa Production, A A. Hower, K T. Leath

IGC Proceedings (1977-2023)

Sitona weevils are pests of various legumes throughout the world. In the United States, the clover root curculio, S. hispi­dulus (F.) is the major species associated with lucerne (alfalfa) Medicago sativa L. This insect has until recently remained obscure as a pest of this major forage crop. However, a recent trend in premature decline of alfalfa has prompted further investigation of this insect/legume interaction. Godfrey and Yeargan (1987) and Hill et al. (1969) indicated that S. hispi­dulus reduced alfalfa production. While adults S. hispidulus feeding on the foliage is of little consequence, it is the associ­ation of larvae with …

Go to article

Resistance To Plant Parasitic Nematodes In Ryegrasses And White Clover, R Cook, K A. Mizen Apr 2025

Resistance To Plant Parasitic Nematodes In Ryegrasses And White Clover, R Cook, K A. Mizen

IGC Proceedings (1977-2023)

Field and glasshouse experiments indicate that several nematodes damage ryegrasses and white clover (Cook and York, 1985). Populations of these nematodes under grassland are often at potentially damaging densities. Several nematode species of long-term grassland have co-evolved host relationsh­ips in which host resistance is likely to have been selected. This is of direct practical relevance to the control of three nematodes, widespread in England and Wales: the root-knot nematode (Meloidogyne naasi) on ryegrasses; and the stem nematode (Ditylenchus dipsaci) and cyst nematode (Heterodera trifolii) on white clover. Our objectives have been, first, to identify resistant …

Go to article

First Prev Next Last