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Articles 1411 - 1433 of 1433

Full-Text Articles in Entomology

Fruit Fly Control With Rogor 40 And Lebaycid : Progress Report, D G. Shedley Jan 1960

Fruit Fly Control With Rogor 40 And Lebaycid : Progress Report, D G. Shedley

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

THE Mediterranean fruit fly has been present in Western Australia for over 60 years and during that time many types of insecticides have been tested against the pest.

Traps and lures were amongst the earliest control measures adopted, but these gave way to sugar solutions poisoned with such materials as arsenic and sodium fluosilicate.


Insects And Mites Found Attacking Cereal Crops In Western Australia, Clee Francis Howard Jenkins Jan 1960

Insects And Mites Found Attacking Cereal Crops In Western Australia, Clee Francis Howard Jenkins

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

ONE of the most important factors influencing Western Australian agriculture in the last 20 years has been the development of permanent pastures together with the associated practice of ley farming.

Although the increased use of pasture plants, and particularly subterranean clover, has increased the general fertility of many areas it has also accentuated various problems, including those relating to insect control.

Summer fallow was a strong deterrent to such pests as the red-legged earth mite, the lucerne flea, and webworm and these and several other creatures have shown a tendency to increase under new farming methods.


Kimberley Research Station : A Progress Report, Department Of Agriculture, Western Australia Jan 1960

Kimberley Research Station : A Progress Report, Department Of Agriculture, Western Australia

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

INTEREST in the agricultural potential of the Kimberley region in Western Australia dates from its early exploration and settlement in the last century.

Several farming development schemes were considered for the area, but were never implemented.

This could be mainly attributable to lack of knowledge of agricultural potentialities, limitations of the local environment and ways of exploiting the local environment.

Up to the present the economy of the region is almost entirely based upon the extensive production of beef and to a lesser extent, wool.


Rice Stem Borers At The Kimberley Research Station, L E. Koch Jan 1960

Rice Stem Borers At The Kimberley Research Station, L E. Koch

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

STEM boring caterpillars have severely damaged rice crops at the Kimberley Research Station, near Wyndham, and studies have been made on the biology, abundance, and control of these insects.


Control Of The Red-Legged Earth Mite And Lucerne Flea : Treatment Of Seed With Systemic Insecticides, M M H Wallace Jan 1960

Control Of The Red-Legged Earth Mite And Lucerne Flea : Treatment Of Seed With Systemic Insecticides, M M H Wallace

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

THE red-legged earth mite, Halotydeus destructor (Tuck.), and the lucerne flea, Sminthurus viridis (L.), are at present controlled effectively, cheaply and safely by a combined DDT/malathion spray (Jenkins, 1956, 1957) and this continues to be the general recommendation for farmers.

However, this combination has some disadvantages. The DDT in the spray ensures some residual control of the earth mite but has the unfortunate property of toxicity to the bdellid mites which are useful predators of the lucerne flea.

The malathion in the spray assists the DDT to control the earth mite and provides a good, quick kill of the lucerne …


Spinach And Aphid Control By Ladybird Beetles, James E. Roberts Jan 1956

Spinach And Aphid Control By Ladybird Beetles, James E. Roberts

Journal of the Arkansas Academy of Science

No abstract provided.


50 Years Of Research At The North Platte Experiment Station, W. W. Burr, J. C. Adams Jun 1954

50 Years Of Research At The North Platte Experiment Station, W. W. Burr, J. C. Adams

Nebraska Agricultural Experiment Station: Historical Circulars

The North Platte Experiment was established fifty years ago. So many changes have occurred since then that few people remember why research in dry land agriculture was started in Nebraska and other Great Plains states. In order to get a proper perspective, it may be well to consider some early history.


Leaflet No 1001 - Aerial Baiting For The Control Of The Little Plague Grasshopper (Austroicetes Cruciata Sauss), C. F. Jenkins Jan 1950

Leaflet No 1001 - Aerial Baiting For The Control Of The Little Plague Grasshopper (Austroicetes Cruciata Sauss), C. F. Jenkins

Bulletins 1 - 2999

Aeroplanes have been tested for grasshopper control in many parts of the world during the last decade but the insecticides used have been in either dust or spray form.

The aerial distribution of bran bait is quite a recent development in overseas countries and was tried for the first time in Western Australia during the spring of 1949.


Ec1506 Corn Rootworm Control In Nebraska, Ephriam Hixson, Martin H. Muma, Roscoe E. Hill Feb 1949

Ec1506 Corn Rootworm Control In Nebraska, Ephriam Hixson, Martin H. Muma, Roscoe E. Hill

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 1506 discusses corn rootworm control in Nebraska.


Ec1551 Insect Control In The Production Of Alfalfa Seed, Ephriam Hixson Jun 1947

Ec1551 Insect Control In The Production Of Alfalfa Seed, Ephriam Hixson

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 1551 discusses insect control in the production of alfalfa seed.


Effects Of Ddt And Other Insecticides On Several Species Of Potato Insects, Roscoe E. Hill Jun 1945

Effects Of Ddt And Other Insecticides On Several Species Of Potato Insects, Roscoe E. Hill

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Field and laboratory tests conducted in Nebraska showed DDT to be more effective than any other material yet tested against potato insect pests. Records were obtained on tuber flea beetles, Epitrix tuberis, potato psyllids, Paratrioza cockerelli, potato leafhoppers, Empoasca fabae, green peach aphids, Myzus persicae, Lygus elisus, Chlamydatus associatus, Aceratagallia uhleri and Macrosteles divisus. DDT remained effective against potato psyllids and potato leafhoppers under field conditions for a relatively long period of time. Populations of certain beneficial insects, such as Nabis spp., Orius spp. and lady beetles were found to be significantly reduced …


A Preliminary Survey Of Insects Visiting Goldenrod In Itasca Park, Alice Endicott Apr 1943

A Preliminary Survey Of Insects Visiting Goldenrod In Itasca Park, Alice Endicott

Journal of the Minnesota Academy of Science

No abstract provided.


Spraying Tree Fruits, C. C. Wiggans, E. H. Hoppert Mar 1940

Spraying Tree Fruits, C. C. Wiggans, E. H. Hoppert

Nebraska Agricultural Experiment Station: Historical Circulars

The production of sound, clean fruit is unquestionably one of the major problems facing the modern fruit grower. Culture may be neglected and pruning delayed for a time but the omission of sprays for even a single season demonstrates their absolute necessity. This applies equally to the commercial grower and to the farmer or gardener who has only a few trees.


Fifty Years Of Achievement In Agricultural Investigation, R. T. Prescott Mar 1939

Fifty Years Of Achievement In Agricultural Investigation, R. T. Prescott

Nebraska Agricultural Experiment Station: Historical Circulars

In Nebraska, a hustling frontier state in 1887, the legislature hesitated not at all in taking advantage of the provisions of the Hatch Act, and now that fifty years have elapsed since the Station was founded, seventy-five years since the Land Grant College Act was passed and the U. S. Department of Agriculture established, and almost twenty-five years since the Agricultural Extension Service was added, it seems worth while to present a general summary of achievement within the state. The main object will be to show some of the important things that have been learned through the investigations of the …


Infection Experiments With Spindle Tuber And Unmottled Curly Dwarf Of The Potato, R. W. Goss Feb 1931

Infection Experiments With Spindle Tuber And Unmottled Curly Dwarf Of The Potato, R. W. Goss

Nebraska Agricultural Experiment Station: Historical Research Bulletins

It is probable that more than one insect species are capable of spreading some of the potato virus diseases. This conclusion was also indicated by repeated observations in the dry-land section of western Nebraska. While aphids are abundant and are probably the chief vectors of potato virus diseases in the more humid sections of the country, they are usually scarce in the western upland plains area and are not present in large enough numbers to account for the rapid spread of spindle tuber and unmottled curly dwarf which sometimes occurs. It was therefore considered advisable to determine the common potato …


Leaflet No 256 - Climbing Cut-Worm Or Tomato Moth (Chlorodea Obsoleta), L. J. Newman Jan 1930

Leaflet No 256 - Climbing Cut-Worm Or Tomato Moth (Chlorodea Obsoleta), L. J. Newman

Bulletins 1 - 2999

During the past spring caterpillars of various kinds have been unusually prevalent. In some instances they have been so numerous as to constitute a plague.

The caterpillar most in evidence was the larva of the Climbing Cut-worm or Tomato Moth.


Spraying Tree Fruits, C. C. Wiggans, E. H. Hoppert Mar 1928

Spraying Tree Fruits, C. C. Wiggans, E. H. Hoppert

Nebraska Agricultural Experiment Station: Historical Circulars

The production of sound, clean fruit is unquestionably one of the major problems facing the modern fruit grower. Culture may be neglected and pruning delayed for a time but the omission of sprays for even a single season demonstrates their absolute necessity. This applies equally to the commercial grower and to the farmer or gardener who has only a few trees.


Bulletin 122 - Fruit-Fly: Description And Control, L. J. Newman Jan 1924

Bulletin 122 - Fruit-Fly: Description And Control, L. J. Newman

Bulletins 1 - 2999

IT is a fundamental principle of Economic Entomology that, in order to successfully combat an insect, the life history of that insect must be worked out. A feature common to all insects is a series of stages involving distinct changes of form which succeed each other in a definite order.

An insect like the fruit-fly affords no exception to this universal rule. Beginning with the fly, we have in regular succession—Egg, Larva, Pupa, and finally the fly again. These stages represent what is known as the life cycle of time insect. Each change—such as larva to pupa, pupa to fly—is …


Bulletin 106 - The Red-Legged Velvet Earth Mite, L. J. Newman Jan 1923

Bulletin 106 - The Red-Legged Velvet Earth Mite, L. J. Newman

Bulletins 1 - 2999

This pest is sometimes called in error the "Red Spider" or the 'Earth Flea."

It is neither a spider nor a flea, being a species of mite.

It belongs to the family of mites known as the Eupodidae and to the Genus Notophallus. Many of the members of this family are predaceous, that is, they live upon other insects or animals, but the species we are dealing with appears to be wholly a plant feeder. A popular idea is that the mite lives and breeds in the earth. The rapidity with which newly planted vegetables become infested gives good excuse …


Spraying Experiments In Nebraska, J. Ralph Cooper Apr 1917

Spraying Experiments In Nebraska, J. Ralph Cooper

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The more important questions which were considered during the three years covered by the present report were as follows: 1. How many summer sprays are required and when should they be applied? 2. What is the difference in efficiency between various brands of arsenate of lead? 3. What are the relative values of lime sulphur and Bordeaux as fungicides for spraying apples? 4. Is it possible to lessen or prevent Bordeaux injury and at the same time control fungous diseases? 5. Is it possible to interchange Bordeaux and lime sulphur in a spray schedule in such a manner as to …


Bulletin No. 129 - Codling Moth Studies In 1911: The Driving Spray Under Excessively Wormy Conditions, E. D. Ball, W. M. Ball Nov 1913

Bulletin No. 129 - Codling Moth Studies In 1911: The Driving Spray Under Excessively Wormy Conditions, E. D. Ball, W. M. Ball

UAES Bulletins

Spraying experiments against the codling moth were carried on upon the Smart orchard until the number of worms per tree was reduced to such an extent that no accurate comparisons could be made between different treatments. As a result of the work on this and other orchards, practically every commercial orchard in the valley was by this time well sprayed and the worms reduced to a point where one driving spray per season would keep them under control.

In the meantime a number of questions arose which required very wormy conditions to adequately investigate. Search was therefore made for orchards …


Bulletin No. 95 - Codling Moth Work In 1904: The Relative Value Of Early And Late Sprays, E. D. Ball, E. G. Peterson Mar 1906

Bulletin No. 95 - Codling Moth Work In 1904: The Relative Value Of Early And Late Sprays, E. D. Ball, E. G. Peterson

UAES Bulletins

The codling moth continues to be the most s serious pest of the Utah horticulturist and was therefore made the main subject of investigation by the Entomological Department for the season of 1904.

In spite of the immense amount of work that ha been done on this subject by various entomologists in this and other countries, several vital points still remain unknown and many more that have been worked out for other localities must be verified and adapted to our conditions.


Bulletin No. 87 - The Codling Moth, E. D. Ball Mar 1904

Bulletin No. 87 - The Codling Moth, E. D. Ball

UAES Bulletins

The codling moth has been in the State of Utah for over twenty-five years and is now injuriously abundant in every apple-growing section. It is by far the worst pest with which the fruit grower has to contend. In fact, it usually does more damage than all the other fruit insects put together.

It occurs throughout every apple-growing region of the United States, and is found in almost every country where the apple is grown, destroying from one-fourth to three-fourths of the apple crop where no effort is made to check its ravages. Dr. Howard the United States Entomologist, recently …