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Full-Text Articles in Life Sciences

Life History Studies As Related To Weed Control In The Northeast; 6: Large And Small Crabgrass, R.A. Peters, Stuart Dunn May 1971

Life History Studies As Related To Weed Control In The Northeast; 6: Large And Small Crabgrass, R.A. Peters, Stuart Dunn

Storrs Agricultural Experiment Station

No abstract provided.


Cause And Control Of A Common Market Disease Of Lettuce, William Palmore Mar 1971

Cause And Control Of A Common Market Disease Of Lettuce, William Palmore

Masters Theses & Specialist Projects

Head lettuce, Lactuta sativa var. capitata, is susceptible to a number of economically important diseases, the most frequent being russet spot, rib discoloration, and vascular browning (28), which have been shown by Ceponis and Friedman (7) to be caused by Pseudomonas marginalis. Pseudomonads are common plant pathogens and cause such diseases as halo blight in beans (20), bacterial blight in soybeans (20), and bacterial wilt of the bird-of-paradise (27) and tobacco (24).

Plants that develop symptoms similar to russet of lettuce are oats, infected by Pseudomonas cichorii, and tobacco infected with Pseudomonas tobaci (34). In general, russet symptoms include few ...


Winter 1972, Cecil F. Kerr, L. J. Zanoni, L. F. Michelson, W. G. Colby, M. Drake, Frederick G. Cheney, R. A. Peters, Frank P. Achorn, W. C. Scott Jr. Jan 1971

Winter 1972, Cecil F. Kerr, L. J. Zanoni, L. F. Michelson, W. G. Colby, M. Drake, Frederick G. Cheney, R. A. Peters, Frank P. Achorn, W. C. Scott Jr.

Turf Bulletin

  1. The Mode of Action of Arsenicals in the Soil by Cecil F. Kerr (page 3)
  2. The Golf Course Superintendent: A Job Description (5)
  3. Factors Affecting Carbohydrate Reserves of Cool Season Turfgrasses by L.J. Zanoni, L. F. Michelson, W.G. COlby, and M. Drake (6)
  4. Turf Bulletin's Photo Quiz by Frederick G. Cheney (9)
  5. A Close Look at TCDD (10)
  6. Environmental News--Environmental Protection Agency Cancels Registration of Herbicide Amitrole (11)
  7. Homeowner's Section--Crabgrass in Perspective by R.A. Peters (12)
  8. Merion Tees--Maintenance Suggestions (14)
  9. Use of Ammonium Sulfate in Fluid Fertilizers by Frank P. Achorn and W.C. Scott ...


Fall 1971, John M. Zak, Peter A. Kaskeski, Frederick G. Cheney, Carl L. Klein, Robert W. Schery Jan 1971

Fall 1971, John M. Zak, Peter A. Kaskeski, Frederick G. Cheney, Carl L. Klein, Robert W. Schery

Turf Bulletin

  1. Maintenance Preparations for the Greater Hartford Open at Wethersfield Country Club (page 3)
  2. "Maintain" as a Growth Retardant by John M. Zak and Peter A. Kaskeski (5)
  3. Chicago Ordinance Curbs Power Equipment Noise (8)
  4. Turf Bulletin's Photo Quiz by Frederick G. Cheney (9)
  5. The Mercury by Carl L. Klein (10)
  6. Homeowner's Section--Fescues are Shady Characters by Robert W. Schery (14)
  7. 12 Trees and Shrubs for Summer Color (16)
  8. Editorial--Talkin' Turfie by Frederick G. Cheney (20)


Summer 1971, C. J. Gilut, Joseph Troll, Frederick G. Cheney, Mark Loper, Holman M. Griffin, Robert W. Schery, J. M. Vargas Jr., Charles W. Laughlin, Thomas G. Pardy, Donald A. Spencer Jan 1971

Summer 1971, C. J. Gilut, Joseph Troll, Frederick G. Cheney, Mark Loper, Holman M. Griffin, Robert W. Schery, J. M. Vargas Jr., Charles W. Laughlin, Thomas G. Pardy, Donald A. Spencer

Turf Bulletin

  1. Mercury - Is The Amount in Seafood Poisonous? by C.J. Gilgut (3)
  2. Comparison of Several Fertilizer Salts and Their Effect on Penn Cross Creeping Bentgrass Top Growth by Joseph Troll (5)
  3. Turf Bulletin's Photo Quiz by Frederick G. Cheney (7)
  4. A Review of the Trace ELements by Mark Loper (8)
  5. Now is the Time to Cut Costs by Holman M. Griffin (12)
  6. For the Homeowner -- Thatch and its Control by Joseph Troll (14)
  7. Lawns Slow Pollution by Robert W. Schery (15)
  8. Decimate the Decibels (16)
  9. Benomyl for the Control of Fusarium Blight of 'Merion' Kentucky Bluegrass by J.M ...


Spring 1971, James L. Holmes, Frederick G. Cheney, R. G. Novak, O. H. Hammer, A. J. Powell Jr., Malcolm A. Mckenzie, F. E. Hutchinson Jan 1971

Spring 1971, James L. Holmes, Frederick G. Cheney, R. G. Novak, O. H. Hammer, A. J. Powell Jr., Malcolm A. Mckenzie, F. E. Hutchinson

Turf Bulletin

  1. Damage to the GOlf Course by James L. HOlmes (page 3)
  2. Editorial (7)
  3. Turf Bulletin's Photo Quiz by Frederick G. Cheney (7)
  4. Pesticide Waste Disposal by R.G. Novak and O.H. Hammer (8)
  5. 1971 Turf Conference Program (12-13)
  6. Turf Management by A.J. Powell, Jr. (14)
  7. Homeowner's Guide for Spring Lawn Care (16)
  8. The Role of Shade Trees in Urban Arboriculture by Malcolm A. McKenzie (17)
  9. Locating Cause of Pressure Loss in Power Sprayers (18)
  10. How Soil pH is Affected by the Fertilizers You Use by F.E. Hutchinson (20)


1971, Frank Santos, Alan R. Albin, Eugene P. Ellcik, Fred V. Grau, Michael O. Mattwell, Richard C. Blake, Christopher G. Moustakis, Haim B. Gunner, Allen H. Morgan, William E. Sopper, Alexander M. Radko, Edmund B. Ault, John E. Gallagher, Mal Purdy, Wayne Zoppo, R. E. Partyka, John C. Schread, Henry W. Indyk, Dale Kern, Geoffrey S. Cornish, Alton E. Rabbitt, F. W. Hazle, James R. Maloney, Ray Christopherson Jan 1971

1971, Frank Santos, Alan R. Albin, Eugene P. Ellcik, Fred V. Grau, Michael O. Mattwell, Richard C. Blake, Christopher G. Moustakis, Haim B. Gunner, Allen H. Morgan, William E. Sopper, Alexander M. Radko, Edmund B. Ault, John E. Gallagher, Mal Purdy, Wayne Zoppo, R. E. Partyka, John C. Schread, Henry W. Indyk, Dale Kern, Geoffrey S. Cornish, Alton E. Rabbitt, F. W. Hazle, James R. Maloney, Ray Christopherson

Turf Clippings

  1. Shop Talk by Frank Santos (page 1)
  2. You've Come a Long Way, Lawn-Mower Pusher by Alan B. Albin (2)
  3. In The Eyes of the Laymen by Eugene P. Elcik (2)
  4. The Importance of Water Management by Fred V. Grau (A-1)
  5. Automatic Irrigation Systems Integrated with Pumping Systems by Michael O. Mattwell (A-5)
  6. Installation of a Complete Water Source and Automatic System by Richard C. Blake (A-19)
  7. How the Soil Conservation Service Can Help in Golf Course Management by Christopher G. Mousitakis (A-22)
  8. Our Shrinking Environment by Haim B. Gunner (A-24)
  9. Pesticides' Dilemma - Emotion vs. Science by Allen H. Morgan ...


Poison Plants Of Western Australia : The Toxic Species Of The Genera Gastrolobium And Oxylobium : Thick-Leaf Poison (Gastrolobium Crassifolium Benth.), Narrow-Leaf Poison (Gastrolobium Stenophyllum Turcz.), Mallet Poison (Gastrolobium Densifolium C.A. Gardn.), Wall-Flower Poison (Gastrolobium Grandifolorum F. Muell), T E H Aplin Jan 1971

Poison Plants Of Western Australia : The Toxic Species Of The Genera Gastrolobium And Oxylobium : Thick-Leaf Poison (Gastrolobium Crassifolium Benth.), Narrow-Leaf Poison (Gastrolobium Stenophyllum Turcz.), Mallet Poison (Gastrolobium Densifolium C.A. Gardn.), Wall-Flower Poison (Gastrolobium Grandifolorum F. Muell), T E H Aplin

Journal of the Department of Agriculture, Western Australia, Series 4

THIS article deals with three species of Gastrolobium which are found in the south-west region of Western Australia. Two of these extend into the Eyre District, the third species is found in the Lake Grace area. The fourth species, Wall-flower poison, is the only toxic species of the genus found outside the State.


Pasture Legume Varieties And Ewe Fertility, T Marshall, H. E. Fels, H. G. Neil, R. C. Rossiter Jan 1971

Pasture Legume Varieties And Ewe Fertility, T Marshall, H. E. Fels, H. G. Neil, R. C. Rossiter

Journal of the Department of Agriculture, Western Australia, Series 4

ALTHOUGH it was first thought that all varieties of subterranean clover would cause ewe infertility, research in the last 10 to 15 years has shown that varieties differ in potency.

The relative level of potency has also been shown to remain consistent for any one variety under normal conditions.


Grain Sorghum In The Ord Valley : Three Crops A Year?, P J. May Jan 1971

Grain Sorghum In The Ord Valley : Three Crops A Year?, P J. May

Journal of the Department of Agriculture, Western Australia, Series 4

High temperatures and ample irrigation water allow grain sorghum to be grown throughout the year on the Ord River Irrigation Area, and observations in 1969-70 indicated that it may be possible in this area to produce three crops in one year from one planting, by ratoon cropping.

This article describes the technique and discusses its possibilities on the Ord.

The sorghum midge, one of the worst pests of sorghum, could well make ratoon cropping impossible, but the midge has not yet been seen in this area.


The Control Of Annual (Wimmera) Ryegrass In Cereal Crops, Geoffrey A. Pearce, B. J. Quinlivan Jan 1971

The Control Of Annual (Wimmera) Ryegrass In Cereal Crops, Geoffrey A. Pearce, B. J. Quinlivan

Journal of the Department of Agriculture, Western Australia, Series 4

The annual ryegrasses are valuable pasture plants in Western Australia, yet have become one of the major weed problems in cereal crops.

The key to cultural control of annual ryegrasses in cereal crops is an understanding of the factors which govern germination of the seed.

Covering the seed with soil keeps out light and provides a more stable moisture supply, bringing about a faster rate of germination. This is the basis of control programmes recommended in this article.

Recommendations for chemical control are also included.


Rapeseed. 3. Varieties And Their Growth Patterns In Western Australia, M L. Poole Jan 1971

Rapeseed. 3. Varieties And Their Growth Patterns In Western Australia, M L. Poole

Journal of the Department of Agriculture, Western Australia, Series 4

RAPE belongs to the genus "Brassica" which also includes such plants as the garden cabbage, wild turnip and cultivated mustard.

The name is derived from the Latin word "rapum". meaning turnip.


Planting A Tree Or Shrub?, C Hart Jan 1971

Planting A Tree Or Shrub?, C Hart

Journal of the Department of Agriculture, Western Australia, Series 4

THE few minutes spent in planting a tree or shrub properly can be the most important moments of its life.

A little time can mean the difference between a vigorous and a weak root system, and a tree is only as good as its roots. Protection of the roots before planting is also important. Bare-rooted trees need more attention than those in a hessian-wrapped root ball or those growing in a container.


Management Of Dry Land Lucerne In The South-West, R Sprivulis Jan 1971

Management Of Dry Land Lucerne In The South-West, R Sprivulis

Journal of the Department of Agriculture, Western Australia, Series 4

MANY dry land lucerne stands have been successfully established in the dairying areas of the South-West.

With good management these can remain productive for many years; poor management can greatly reduce their productive life.


Growing Plants With Salty Water, C V. Malcolm, S. T. Smith Jan 1971

Growing Plants With Salty Water, C V. Malcolm, S. T. Smith

Journal of the Department of Agriculture, Western Australia, Series 4

LACK of good quality water in many parts of Western Australia often forces people to use salty water for irrigation and gardening.

This article gives some hints on how to reduce salt damage to plants when salty water must be used for irrigation or gardening.

It includes a table of plants which may be irrigated with water of varying degrees of salinity and lists precautions which should be taken for each group.


Cotton Bush (Asclepias Fruticosa L.) : Garden Plant Now A Noxious Weed, G R W Meadly Jan 1971

Cotton Bush (Asclepias Fruticosa L.) : Garden Plant Now A Noxious Weed, G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

THE cotton bush is native to South Africa but is now naturalised in most tropical and sub-tropical countries of the world. Its spread is, in no small measure, due to being grown frequently as a garden subject.


Calotropis Or Rubber Tree (Calctropis Procera (Linn.) Dryand), G R W Meadly Jan 1971

Calotropis Or Rubber Tree (Calctropis Procera (Linn.) Dryand), G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

TWO SPECIES of Calotropis have been introduced to the northern parts of Western Australia. They are closely related in most respects but differ in one fundamental feature which decides their significance as undesirable plants.


The Control Of Weeds In Linseed And Rape, Geoffrey A. Pearce Jan 1971

The Control Of Weeds In Linseed And Rape, Geoffrey A. Pearce

Journal of the Department of Agriculture, Western Australia, Series 4

Like all crops linseed and rapeseed can suffer from weed competition.

Linseed is highly susceptible to weed competition, while rape is susceptible to the chemicals used to kill broad-leaved weeds, so both crops pose special problems.

As in other broad-acre crops, cultural methods usually provide the best means of weed control.


Observations On The Establishment Of Seedlings Of Phoradendron Californicum On Prosopis Juliflora, Richard L. Null Jan 1971

Observations On The Establishment Of Seedlings Of Phoradendron Californicum On Prosopis Juliflora, Richard L. Null

Dissertations and Theses

The mistletoe Phoradendron californicum is a common parasite on the mesquite plant Prosopis juliflora. Seeds of the parasite are deposited upon the host plant by birds and perhaps other agents. Normally seedlings of the parasite become established when the elongating radicle of the embryo comes into contact with a host branch and forms a holdfast. From the underside of the holdfast the primary haustorium enters the host tissue and establishes the parasitic union. Later the aerial portion of the parasite develops. Some seeds of P. californicum follow a different sequence; they stimulate the host to produce gum in the tissue ...


The Effect Of Antibiotics On Thermophilic Blue-Green Algae, Erleen Blanche Christenson Jan 1971

The Effect Of Antibiotics On Thermophilic Blue-Green Algae, Erleen Blanche Christenson

Dissertations and Theses

The nature of the action of penicillin on the cell walls of bacteria is reviewed. The composition of bacterial cell walls is compared to cell walls of blue-green algae. The test organisms used were thermophilic: Anacystis nidulans grew optimally at 35⁰C, whereas Synechococcus lividus grew best at 45⁰ C. Growth was recorded by reading optical densities. Cells of these two thermophilic blue-green algae were treated with varying dosages of penicillin and streptomycin. Penicillin inhibited growth of Anacystis nidulans and Synechococcus lividus in concentrations of 3.0 Mg/ml and 0.03 Mg/ml respectively. However, when 0.3 ...


Groups Of Associated Species In The Phytoplankton Of The Caribbean Sea (Ne Of Venezuela), Ramón Margalef, Fernando Gonzalez Bernaldes Jan 1971

Groups Of Associated Species In The Phytoplankton Of The Caribbean Sea (Ne Of Venezuela), Ramón Margalef, Fernando Gonzalez Bernaldes

Reports

This work results from the confluence of two programs of investigation and, naturally, from a common interest in ecological problems. The Institute of Forrestry and Plant Biology had utilized, besides other methods, the analysis of principle components of correlation matrices for the study of vegetation and have at their disposal adequate programs for the treatment of a great volume of data. For its part, the Institute of Fishery Investigations is interested in very similar problems of classification, standardization and calculation, and has collected a large quantity of data on the cell density of different species in the plankton and environmental ...