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Articles 10111 - 10140 of 10382
Full-Text Articles in Entire DC Network
Herbicide Evaluation In Arkansas Rice, 1996, Eric Webster, Ron Talbert, Ford Baldwin, David Gealy, Tomilea Dillon, Jason Norsworthy, Lance Schmidt, Dwayne Beaty
Herbicide Evaluation In Arkansas Rice, 1996, Eric Webster, Ron Talbert, Ford Baldwin, David Gealy, Tomilea Dillon, Jason Norsworthy, Lance Schmidt, Dwayne Beaty
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
The Prairie Naturalist Volume 29, No.3. September 1997
The Prairie Naturalist Volume 29, No.3. September 1997
The Prairie Naturalist
FISHING STATISTICS IN KANSAS PUT-AND-TAKE RAINBOW TROUT FISHERIES ▪ R. D. Schultz and D. D. Nygren
DISTRIBUTIONAL STATUS Of UNCOMMON FISHES AND AN AMPHIBIAN FROM NORTHEASTERN MISSOURI ▪ R. A. Hrabik,
DIET OF A RELICT POPULATION OF THE EASTERN WOODRAT IN NEBRASKA ▪ H. H. Genoways, P. W Freeman, and M. K. Clausen
ANIMAL SPECIES MONITORED BY THE SOUTH DAKOTA NATURAL HERITAGE PROGRAM ▪ E. D. Stukel and D. C. Backlund
Dedication
Announcements
The Prairie Naturalist Volume 29, No.2. June 1997
The Prairie Naturalist Volume 29, No.2. June 1997
The Prairie Naturalist
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1996 ▪ . R. N. Randall
BREEDING BIRD RICHNESS IN THE PRAIRIE POTHOLE REGION OF MINNESOTA ▪ . S. L. Niesar and D. E. Hubbard
UNUSUAL MIGRATION BY A WHITE-TAILED DEER FAWN IN SOUTH DAKOTA ▪ C. S. DePerno, S. L. Griffin, J. A. Jenks, and L. A. Rice
COYOTE FOOD HABITS AT DESOTO NATIONAL WILDLIFE REFUGE, NEBRASKA ▪ J. J. Huebschman, S. E. Hygnstrom, and J. A. Gubanyi
WHITE BASS GROWTH IN SOUTH DAKOTA WATERS ▪ D. W. Willis, H. D. Beck, C. A. Soupir, B. A. Johnson, G. D. Simpson, and …
Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice
Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice
Faculty Publications
In inland California grasslands, the high densities of alien annual species have altered the growing environment for native perennial grasses. Using variable-density plots, we measured the influence of intraspecific competition (conspecifics only) and diffuse competition (mixed-composition neighborhoods that include conspecifics) on growth and survival of Nassella pulchra, purple needlegrass. We assessed the effects of intraspecific and diffuse competition in weeded plots and unweeded plots, respectively, across a density gradient of N. pulchra plants (16–356 plants/m2). We used summer fire and spring sheep grazing to reduce diffuse competition in unweeded plots. The potential effect of rooting volume on competitive interactions …
The Prairie Naturalist Volume 29, No.1. March 1997
The Prairie Naturalist Volume 29, No.1. March 1997
The Prairie Naturalist
UPDATED DISTRIBUTION OF THE LEAST WEASEL ON THE CENTRAL GREAT PLAINS ▪ S. R. Hoofer and J. R. Choate
ESTIMATING SURVIVAL OF SONG BIRD CARCASSES IN CROPS AND WOODLOTS ▪ G. M. Linz, D. L. Bergman, and W. J. Bleier
SEXUAL ALLOCATION IN Carex stricta, A MONOECIOUS, TUSSOCK-FORMING SEDGE ▪ D. M. Estrella and C. E. Umbanhowar, Jr.
ABUNDANCE OF THIRTEEN-LINED GROUND SQUIRRELS IN SHORTGRASS PRAIRIE ▪ L. C. Higgins and P. Stapp
BATS OF JEWEL CAVE NATIONAL MONUMENT, SOUTH DAKOTA ▪ J. R. Choate and J. M. Anderson
NOTES
Northern Harrier Builds Nest On Top Of Depredated Mallard …
Alien Invaders: Envisioning Exotic Species In Florida, Kevin Archer
Alien Invaders: Envisioning Exotic Species In Florida, Kevin Archer
All Faculty Scholarship for the School of Graduate Studies and Research
No abstract provided.
Leafy Spurge - A Review, Sharon A. Clay, Chad M. Scholes
Leafy Spurge - A Review, Sharon A. Clay, Chad M. Scholes
Agronomy, Horticulture and Plant Science Faculty Publications
Leafy spurge (Euphorbia esula L.) is a perennial herbaceous weed that infests millions of acres of range and pasture in the northern Great Plains. It outcompetes grasses and lowers land productivity because cattle will not graze infested areas even if spurge makes up only 10% of the vegetative biomass. This presentation will cover the history, taxonomy, and phenology of leafy spurge. A discussion of chemical, mechanical, and biocontrol techniques that aid in leafy spurge management will also be included.
Analysis Of Spatial Distribution Of Canada Thistle (Cirsium Arvense) In Notill Soybean (Glycine Max), B. L. Broulik, J. Lems, S. A. Clay, D. E. Clay, M. M. Ellsbury
Analysis Of Spatial Distribution Of Canada Thistle (Cirsium Arvense) In Notill Soybean (Glycine Max), B. L. Broulik, J. Lems, S. A. Clay, D. E. Clay, M. M. Ellsbury
Agronomy, Horticulture and Plant Science Faculty Publications
The nonuniform spatial distribution of weeds across a field landscape complicates sampling and modeling, but allows site specific rather than broadcast management of weed populations. Where weeds are aggregated, densities measured at random locations are not independent, but rather spatially related or autocorrelated. Geostatistical methods were used to describe and map nonrandom distribution and variation of shoot density across ten well established patches of Canada thistle, a perennial weed, in a 65 hectare notillage soybean field in Moody county, South Dakota in 1996. Canada thistle densities were determined by counting the number of shoots present in a 20 by 50 …
Factors Affecting Atrazine Fate In North Central U.S. Soils, W. C. Koskinen, Sharon Clay
Factors Affecting Atrazine Fate In North Central U.S. Soils, W. C. Koskinen, Sharon Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Atrazine (6-chloro-N-ethyl-N′-(l-methylethyl)-l,3,5-triazine-2,4-diamine) is a herbicide of the triazine family used for controlling broadleaf and some grassy weeds in corn and sorghum. Since its introduction in the late 1950s, atrazine has been a popular herbicide because it is relatively inexpensive and, in most cases, gives good season-long weed control. It can be applied pre-or postemergence and is often tank mixed with grass herbicides, such as alachlor (2-chloro-N-(2,6-diethylphenyl-N-(methoxymethyl)acetamide), metolachlor(2-chloro-N-(2-2ethyl-6-methylphenyl)-N-(2-methoxy-l-methylethyl) acetamide), butylate (S-ethyl bis(2-methylpropyl)carbamothioate), or EPTC (S-ethyl dipropylcarbamothioate), or with other broadleaf herbicides, such as dicamba (3,6-dichloro-2-methoxybenzoic …
Twenty-Five Year Index To The Prairie Naturalist, Volumes 1-25, 1968-1993, Paul B. Kannowski
Twenty-Five Year Index To The Prairie Naturalist, Volumes 1-25, 1968-1993, Paul B. Kannowski
The Prairie Naturalist
Forward
Author Index
1.Articles and Notes
2. Book Reviews
3. Editorials
Subject Index
Geographic Index
Taxonomic Index
Plants
Animals
Other Records
Macrophyte-Macroinvertebrate Interactions In A Lentic Ecosystem And The Effect Of Fluridone Treatment To Control Myriophyllum Spicatum L., Gregory J. Moeller
Macrophyte-Macroinvertebrate Interactions In A Lentic Ecosystem And The Effect Of Fluridone Treatment To Control Myriophyllum Spicatum L., Gregory J. Moeller
Dissertations and Theses @ UNI
Myriophyllum spicatum L. is an exotic macrophyte that can become pestiferous in lentic ecosystems. Two field studies were conducted to investigate: 1) epiphytic macroinvertebrates associated with M. spicatum and native macrophytes; and 2) epiphytic macroinvertebrate community response to fluridone treatment for M. spicatum control.
In the first study evaluating epiphytic macroinvertebrates associated with M. spicatum and native macrophytes, triplicate samples were collected at three sites in both Auburn and Zumbra Lakes, Minnesota, USA. One site in each lake contained primarily M. spicatum, the second site contained M. spicatum and native vegetation, and the third site was dominated by native …
The Prairie Naturalist Volume 28, No. 4. December 1996
The Prairie Naturalist Volume 28, No. 4. December 1996
The Prairie Naturalist
IMPLANTED MICROCHIPS USED TO INDIVIDUALLY IDENTIFY BLACK-FOOTED FERRETS IN MONTANA ▪ R. Stoneberg
GRAY WOLF STATUS IN NORTH DAKOTA ▪ D. S Licht and L. E. Huffman
VARIATION IN SELECTION OF MICROHABITATS BY MERRIAM'S TURKEY BROOD HENS ▪ M. A. Rumble and S. H. Anderson
SURVIVAL AND REPRODUCTIVE CHRONOLOGY OF FEMALE RING-NECKED PHEASANTS IN SOUTH DAKOTA ▪ A. P. Leif
EFFECTS OF LOGGING SLASH ON ASPEN REGENERATION IN GRAZED CLEARCUTS ▪ M. A. Rumble, T. Pella, J. C. Sharps. A. V. Carter, and J. B. Parrish
BOOK REVIEWS
The Poetry of Ecoregions ▪ J. Pastor
Saving Texas' Rare Ones ▪ …
The Prairie Naturalist Volume 28, No. 3. September 1996
The Prairie Naturalist Volume 28, No. 3. September 1996
The Prairie Naturalist
REPRODUCTIVE SUCCESS OF GRASSHOPPER SPARROWS IN RELATION TO EDGE ▪ J. M Delisle, and J. A. Savidge
OBSERVATIONS ON BATS AT BADLANDS NATIONAL PARK, SOUTH DAKOTA ▪ M A. Bogan, J. G. Osborne, and J. A. Clarke
DIETS OF FEMALE WHITE-TAILED DEER IN THE CROSS-TIMBERS REGION ▪ F. C. Bryant, G. Van Vreede, T. J. Deliberto, and K. L. Gee
NOTES
Second Record of White Ibis in North Dakota ▪ J. W. Marlow, L. D. Igl, and M. R. Hartman
A Recent Record of Mountain Lion in Nebraska ▪ H. H. Genoways and P. W. Freeman
Prairie Falcon Predation on …
The Prairie Naturalist Volume 28, No. 2. June 1996
The Prairie Naturalist Volume 28, No. 2. June 1996
The Prairie Naturalist
RAPTOR NESTING CHRONOLOGY IN NORTHWESTERN NORTH DAKOTA ▪ R. K. Murphy, and J. T. Ensign
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA -1995 ▪ R. N. Randall
YELLOW PERCH SPAWNING HABITATS IN PICKEREL LAKE, SOUTH DAKOTA ▪ S. J. Fisher, K. L Pope, L. J. Templeton, and D. W. Willis
ECOLOGY OF BOTRYCHIUM CAMPESTRE ON NORTHEASTERN lOWA GLADES ▪ J. C. Nekola, and D. W. Schlicht
REPRODUCTIVE BIOLOGY OF PURPLE CONEFLOWER IN SOUTHWESTERN NORTH DAKOTA ▪ H. K. Leuszler, V J. Tepedino, and D. G. Alston
BOOK REVIEWS
A Unique Group of Birds ▪ J. H. Schulz
Forest Ecology ▪ S. …
The Prairie Naturalist Volume 28, No. 1. March 1996
The Prairie Naturalist Volume 28, No. 1. March 1996
The Prairie Naturalist
SUMMER AVIAN ABUNDANCE, INVERTEBRATE BIOMASS, AND FORBS IN KANSAS CRP ▪ S. D. Hull, R.J. Robel, and K. E. Kemp
SUPPRESSION OF SMOOTH BROME BY ATRAZINE, MOWING, AND FIRE ▪ G. D. Willson, and J. Stubbendieck
NOTES
Continued Westward Dispersal of the Woodchuck in Kansas ▪ G. M. Wilson and J. R. Choate
Intraspecific Aggression Between GadwalIs Results in Mortality ▪ D. E. Naugle, K. F. Higgins and M. S. Wilsdon
Western Meadowlark Impaled on Barbed-wire Fence ▪ L. D. Igl
Cyperaceae in Dodge County Nebraska: New Records ▪ S. J. Rothenberger
BOOK REVIEWS
Native Habitats of the Twin Cities …
Evapotranspiration From A Saltcedar-Dominated Desert Floodplain: A Scaling Approach, S. D. Smith, A. M. Sala, Dale A. Devitt
Evapotranspiration From A Saltcedar-Dominated Desert Floodplain: A Scaling Approach, S. D. Smith, A. M. Sala, Dale A. Devitt
Life Sciences Faculty Research
The purpose of this study was to investigate evapotranspiration (ET) from a variety of scales (leaf to landscape) in saltcedar-dominated floodplain vegetation along the lower Virgin River of southern Nevada. Leaf-level gas exchange indicated that saltcedar exhibits similar stomatal conductance as the sympatric phreatophytes arrowweed, mesquite, and willow. However, sap flow in saltcedar was higher per unit sapwood area than the other species, suggesting that it maintains higher leaf area per unit sapwood area. At the stand level, saltcedar ET was found to exceed potential ET early in the summer when soils were moist and the water table was near …
Weeds : A Curse For Native Plants In Farm Woodlands, Max Abensperg-Traun
Weeds : A Curse For Native Plants In Farm Woodlands, Max Abensperg-Traun
Journal of the Department of Agriculture, Western Australia, Series 4
Weeds have a mJOR IMPct on native Australian plants, particularly in the tropical north and the agricultural regions of southern Australia.
Maz Abensperg-Traun, and his clooeagues from the CSIRO Division of Wildlife and Ecology, explainthe effects of weed invasion on the diversity of native herbaceous plants in faarm woodlands in the centeral wheatbelt of south-west Western Australia.
Weeds Can Poison Crops, Aik Hock Cheam
Weeds Can Poison Crops, Aik Hock Cheam
Journal of the Department of Agriculture, Western Australia, Series 4
Weeds can interfere with the growth of a crop simply by competing with the crop for nutrients, moisture and light. But some weeds also release chemicals that inhibit the germination and growth of crop plants; the technical term for this is allelopathy. Aik Cheam outlines the problems caused by two common weeds and the discusses preventative measures.
The Prairie Naturalist Volume 27, No.4 December 1995
The Prairie Naturalist Volume 27, No.4 December 1995
The Prairie Naturalist
NEW DISTRIBUTIONAL RECORDS FOR MAMMALS IN KANSAS · D. W Sparks and J. R. Choate
CLAY-COLORED SPARROWS IN NORTH DAKOTA PARASITIZED BY BROWN-HEADED COWBIRDS ▪ G. P. Romig and R. D. Crawford
A NOTEWORTHY RECORD AND THE BREEDING DISTRIBUTION OF THE BLUE GROSBEAK IN NORTH DAKOTA ▪ L. D. Igl
NEAR LONGEVITY RECORD FOR THE SNOW GOOSE ▪ M T. Koenen and D. M. Leslie, Jr.
COMPARISON OF WATER CONSUMPTION BETWEEN TWO GRASSLAND EMBERIZIDS ▪ J. L. Zimmerman
FACTORS ASSOCIATED WITH DECLINING PROPORTION OF CITIZENS HUNTING IN SOUTH DAKOTA ▪ N. J. Dietz, K. F. Higgins, and R. D. Mendelsohn …
The Prairie Naturalist Volume 27, No.3. September 1995
The Prairie Naturalist Volume 27, No.3. September 1995
The Prairie Naturalist
SONGBIRD RESPONSES TO SAGEBRUSH REMOVAL IN A HIGH ELEVATION SAGEBRUSH STEPPE ECOSYSTEM ▪ L L Kerley and S. H Anderson
THE AVIFAUNA OF REMNANT TALLGRASS PRAIRIE NEAR BOULDER, COLORADO ▪ C E Bock, J. H Bock, and B. C Bennett
SHORT -TERM RESPONSES OF SMALL MAMMALS TO AUTUMN FIRE IN TALLGRASS PRAIRIE ▪ B.R. McMillan, D. E Brillhart, G A. Kaufman, and D. W. Kaufman
DIVERGENT SELECTION FOR SEED MASS IN FOXTAIL DALEA ▪ R. Bortnem and A. Boe
NOTES
American Woodcock Use of a Nest Box ▪ D.L. Bergman and J. M. Bergman
BOOK REVIEWS
Iowa's Vascular Plants ▪ …
The Prairie Naturalist Volume 27, No.2. June 1995
The Prairie Naturalist Volume 27, No.2. June 1995
The Prairie Naturalist
WILDLIFE MORTALITY ASSOCIATED WITH OIL PITS IN WYOMING ▪ B.J. Esmoil and S.H. Anderson
DRAMATIC INCREASE OF LE CONTE'S SPARROW IN CONSERVATION RESERVE PROGRAM FIELDS IN THE NORTHERN GREAT PLAINS ▪ LD. Igl and D.H. Johnson
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1994 ▪ R.N. Randall
DESCRIPTIONS OF WALLEYE STOCKS IN HIGH-ELEVATION RESERVOIRS, WYOMING ▪ T.D. Marwitz and W A. Hubert
NEW VASCULAR PLANT RECORDS FOR THE BLACK HILLS OF SOUTH DAKOTA AND WYOMING • G.E. Larson and J.R. Johnson
NOTES
A New Population of Small White Lady's-Slipper (Cypripedium candidum) in South Dakota ▪ S.E. Boettcher
Sandhill …
The Prairie Naturalist Volume 27 , No. 1. March 1995
The Prairie Naturalist Volume 27 , No. 1. March 1995
The Prairie Naturalist
DISTRIBUTION AND STATUS OF SAGE GROUSE IN COLORADO ▪ CE. Braun
BIRDS ASSOCIATED WITH BLACKBIRD SPRING FEEDING SITES IN SOUTH DAKOTA ▪ G.M. Linz, D.L. Bergman and W J. Bleier
INFLUENCE OF FORB ABUNDANCE ON WINTER BIRD USE OF CONSERVATION RESERVE PROGRAM FIELDS ▪ S.D. Hull, R.J. Robel and K.E. Kemp
FIRST NEST DOCUMENTATION FOR WHIP-POOR-WILL IN SOUTH DAKOTA ▪ K. L. Dean, D.L. Swanson, E.T. Liknes and D.P. Weinacht
WOOD DUCK POPULATION EXPANSION IN NORTHERN MONTANA ▪ DM. Prellwitz, J.R. Little, L.R. Rau and C.J. Hoff
PRAIRIE VOLES AT LOW DENSITY IN UNGRAZED TALLGRASS PRAIRIE IN THE FLINT HILLS …
Grain Legume And Canola Autumn Updates 1995, David Williams
Grain Legume And Canola Autumn Updates 1995, David Williams
Grain and other field crops published reports
Grain legumes
- Chickpea
- Field pea
- Lentil
- Faba beans
Canola essentials:
Site selection -Paddock selection is critical for a successful canola crop. Avoid paddocks with waterlogging, wind erosion and broadleaf weeds - particularly wild radish, turnip, mustard and doublegees.
Soil type - Canela grows well on most soil types, however it prefers well drained gravel soils, red loams, sandy _loams and deeper duplex soils. Soil pH levels (in CaCl2) of 4.5 to 8.0 are suitable. Soil test paddock for pH, phosphorus, and potassium levels.
Rotation - Grow canola after manipulated pasture, lupins or other grain …
The Prairie Naturalist Volume 26, No. 4. December 1994
The Prairie Naturalist Volume 26, No. 4. December 1994
The Prairie Naturalist
REPRODUCTION OF RING-NECKED PHEASANTS IN IOWA ▪ T Z. Riley, J. B. Wooley, Jr. , and W. B. Rybarczyk
DIETARY COMPARISONS OF ADULT MALE COMMON GRACKLES, RED-WINGED BLACKBIRDS, AND YELLOW-HEADED BLACKBIRDS IN NORTH CENTRAL NORTH DAKOTA ▪ H. J. Homan, GM. Linz, W. J. Bleier, and R. B. Carlson
ECOGEOGRAPHY OF SOUTHERN BOG LEMMING AND MEADOW VOLE IN NORTH CENTRAL KANSAS ▪ T. L. Welker and J. R. Choate
SUMMER AND FALL FOOD HABITS OF COYOTES IN SOUTHWESTERN NORTH DAKOTA ▪ T. L. Lewis, W. F. Jensen, K. A. Keehr, and R. W. Seabloom
MOVEMENT PATTERNS OF WHITE-TAILED DEER AT …
The Prairie Naturalist Volume 26. No. 3. September 1994
The Prairie Naturalist Volume 26. No. 3. September 1994
The Prairie Naturalist
BREEDING RANGE AND POPULATION STATUS OF LESSER PRAIRIE-CHICKENS IN COLORADO ▪ K. M. Giesen
LESSER PRAIRIE-CHICKEN MOVEMENTS AND HOME RANGES IN NEW MEXICO ▪ T. Z. Riley, C. A. Davis, M. A. Candelaria, and H. R. Suminski
WATERFOWL PRODUCTIVITY AND USE OF NESTING STRUCTURES IN THE PRAIRIE POTHOLE REGION ▪ R. R. Johnson, K. F. Higgins, I. J. Ball. and S. C. Kohn
A COMPARISON OF PERCH USE BY VOCALIZING EASTERN AND WESTERN MEADOWLARKS ▪ K. A. Kinstler and T. A. Sordahl
FARM OPERATOR ATTITUDES TOWARD WHITE-TAILED DEER AT SAND LAKE NATIONAL WILDLIFE REFUGE, SOUTH DAKOTA ▪ D. E. Naugle. …
The Prairie Naturalist Volume 26, No. 2. June 1994
The Prairie Naturalist Volume 26, No. 2. June 1994
The Prairie Naturalist
EARLY HISTORY OF THE NORTH DAKOTA NATURAL SCIENCE SOCIETY ▪ J. T. Lokemoen
TEMPORAL VARIATION IN COYOTE PREY IN TALLGRASS PRAIRIE OF EASTERN KANSAS ▪ D. E. Brillhart and D. W. Kaufman
DIFFERENCES IN USE OF INTERSPERSED WOODLAND AND GRASSLAND BY SMALL MAMMALS IN NORTHEASTERN KANSAS ▪ B. R. McMillan and D. W. Kaufman
THE CIRCANNUAL MASS CYCLE IN THREE POPULATIONS OF THIRTEEN-LINED GROUND SQUIRREL ▪ G. Y. Walker, O. A. Schwartz, and J. E. Joy
SUMMER ELK TRAPPING IN SOUTH DAKOTA ▪ J. J. Millspaugh, G. C. Brundige, and J. J. Jenks
OUT-OF-SEASON BIRTHS OF ELK CALVES IN WYOMING …
The Prairie Naturalist Volume 26. No. 1. March 1994
The Prairie Naturalist Volume 26. No. 1. March 1994
The Prairie Naturalist
FISH CATCHES WITH HOOP NETS OF TWO DESIGNS IN THE LARAMIE RIVER, WYOMING ▪ W. A. Hubert and T. M. Patton
LENGTH DISTRIBUTIONS OF NORTHERN PIKE CAUGHT IN FIVE GILL NET MESH SIZES ▪ R. M. Neumann and D. W. Willis
EVALUATION OF LARGEMOUTH BASS SLOT LENGTH LIMITS IN TWO SMALL SOUTH DAKOTA IMPOUNDMENTS ▪ R. M. Neumann, D. W. Willis, and D. D. Mann
POSSIBLE PREDATION OF A FORSTER'S TERN CHICK BY A SNAPPING TURTLE ▪ G. Fraser
SMALL MAMMAL DIVERSITY AND ABUNDANCES IN THREE CENTRAL IOWA GRASSLAND HABITAT TYPES ▪ L. A. Hayslett and B. J. Danielson
SMALL …
Delaying The Development Of Herbicide Resistant Ryegrass By Using Alternative Weed Control Strategies, A. J. Diggle, G. S. Gill, J. E. Holmes
Delaying The Development Of Herbicide Resistant Ryegrass By Using Alternative Weed Control Strategies, A. J. Diggle, G. S. Gill, J. E. Holmes
Biosecurity published reports
Alternative strategies to control ryegrass in wheat lupin rotations are worth approximately 15 dollars per hectare for each 50% reduction achieved in plant or seed numbers. This figure has been calculated for circumstances similar to those found at Wongan Hills, and it holds in all cases where ryegrass is still under control using standard herbicides.
Farmers should adopt any ryegrass strategy in addition to that normally practised, so long as the cost to control ratio is less than $15/ha/50% kill. This applies even where good control is being achieved using grass selective herbicides, regardless of the number of previous applications …
Biological Control Of Doublegee : Israeli Weevil Could Help Fight Doublegee, John Scott, Paul Yeoh
Biological Control Of Doublegee : Israeli Weevil Could Help Fight Doublegee, John Scott, Paul Yeoh
Journal of the Department of Agriculture, Western Australia, Series 4
Since its deliberate introduction from South Africa as a salad vegetable in 1830 the doublegee has spread to become a major weed throughout much of Australia.
It is one of the most serious weeds of crops and pastures in Western Australia, smothering other more useful plants while young, and troubling both humans and animals with its sharp spiny seeds when mature.
Using biological control techniques, scientists are now attacking it and related docks in three ways - with an aphid, a weevil and a fungus.
Within a few years it is hoped that while still present, the doublegee will be …
Biological Control Of Doublegee : Doublegee Decline And The Dock Aphid, John Scott, Francoise Berlandier, Kristy Hollis
Biological Control Of Doublegee : Doublegee Decline And The Dock Aphid, John Scott, Francoise Berlandier, Kristy Hollis
Journal of the Department of Agriculture, Western Australia, Series 4
Since 1990 farmers in the Western Australian wheatbelt have been reporting doublegee plants that appear to be diseased, stunted and producing poorly formed fruit (the spiny casing around the single doublegee seed). Often no obvious cause of this decline in plant health is apparent. Experiments carried out in 1990 showed that an aphid, which feeds hidden in the growing tips of doublegee stems and in young distorted leaves, is the most likely cause. This North American aphid, the dock aphid (Brachycaudus rumexicolens), arrived in WA in 1987. It appears to only feed on docks, doublegees and related plants and is …