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Articles 10381 - 10410 of 11462

Full-Text Articles in Entomology

Snails And Slugs, C F.H Jenkins May 1952

Snails And Slugs, C F.H Jenkins

Journal of the Department of Agriculture, Western Australia, Series 3

Before giving any details concerning these pests, it will be well to explain that slugs and snails are, of course, not insects. They have been included in this series of articles, however, because the damage they do resembles very much that done by various insects and because the lot of recommending control measures usually falls to an entomologist. The snail could more correctly be called a shellfish than an insect as it is a true mollusc, but one which has become adapted to a life on land instead of in the water.

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Argentine Ants Mar 1952

Argentine Ants

Journal of the Department of Agriculture, Western Australia, Series 3

Specimens of ants submitted in February by the Rockingham Health Inspector were identified as Argentine ants, these being the first recorded from this area. Two areas of infestation are present in the Rockingham townsite—one adjacent to the hotel and the other near the Fisher Street jetty. Active steps were taken by the local authorities to bring the infestation under control.

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The Webworm, C F.H Jenkins Mar 1952

The Webworm, C F.H Jenkins

Journal of the Department of Agriculture, Western Australia, Series 3

The popular name webworm has been applied to a small caterpillar whose depredations in ploughed-in wheat crops have concerned farmers in this State for many years. The first record of the insect as a pest was made by Newman (1927) under the scientific name of Sclerobia tritialis Wlk. and it has been referred to as such in all subsequent Departmental publications. Recent investigations, how-ever, suggest that either more than one species of insects is covered by the term webworm or that the true webworm is a Crambid moth known as Talis pedionoma Mayr.

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Terrestrial Isopoda Of Arkansas, David Causey Jan 1952

Terrestrial Isopoda Of Arkansas, David Causey

Journal of the Arkansas Academy of Science

No abstract provided.

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On Two New Species And New Distribution Records Of Paraiulid Milipeds From The Eastern United States, Nell B. Causey Jan 1952

On Two New Species And New Distribution Records Of Paraiulid Milipeds From The Eastern United States, Nell B. Causey

Journal of the Arkansas Academy of Science

No abstract provided.

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Yearly Population Fluctuation Of Bombus Morrisoni At Fredonia, Arizona, George E. Bohart, George F. Knowlton Jan 1952

Yearly Population Fluctuation Of Bombus Morrisoni At Fredonia, Arizona, George E. Bohart, George F. Knowlton

All PIRU Publications

No abstract provided.

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Wild Bees For Pollination Of The Alfalfa Seed Crop In Utah, George E. Bohart, George F. Knowlton Jan 1952

Wild Bees For Pollination Of The Alfalfa Seed Crop In Utah, George E. Bohart, George F. Knowlton

All PIRU Publications

No abstract provided.

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A Report On Drosophila Collections In Nebraska, David D. Williams, Dwight D. Miller Jan 1952

A Report On Drosophila Collections In Nebraska, David D. Williams, Dwight D. Miller

Bulletin of the University of Nebraska State Museum (1924–2023)

Until rather recently little has been known of the Drosophila species of Nebraska. Sturtevant (1921) lists Nebraska as one of seven states from which no Drosophila had been reported. Patterson and Wagner (1943) show that collections of Drosophila pseudoobscura had been made in the vicinities of Scottsbluff and Kearney, but no other Drosophila species are reported from Nebraska in their publication.

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Insect Types In The Collections Of The University Of Nebraska State Museum, Martin H. Muma Jan 1952

Insect Types In The Collections Of The University Of Nebraska State Museum, Martin H. Muma

Bulletin of the University of Nebraska State Museum (1924–2023)

In 1948 the insect collections at the University of Nebraska State Museum were placed in the care of the author. Prior to that date curatorial duties were assumed or assigned to full time teaching or research staff members. As would be expected under the latter circumstances, the organization of study material and types was neglected in many families and genera. Since 1948 type material, because of its intrinsic value, has received considerable attention. All primary and representative secondary types have been assembled in three museum cases and one slide cabinet for curatorial and study convenience.

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Insect Pests And Their Control, C. F. H. Jenkins Jan 1952

Insect Pests And Their Control, C. F. H. Jenkins

Journal of the Department of Agriculture, Western Australia, Series 3

Methods of insect control are sometimes classified under the four following headings—Quarantine, Cultural Methods, Biological Control and Chemical Treatments. Each method has its own particular part to play in preventing the spread and multiplication of insect pests and it is essential for maximum results that everyone—whether he be a commercial grower or a backyard gardener—has a general understanding of the principles involved.

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A Graphic Résumé Of The Pleistocene Of Nebraska (With Notes On The Fossil Mammalian Remains), C. Bertrand Schultz, Gilbert C. Lueninghoener, W. D. Frankforter Jul 1951

A Graphic Résumé Of The Pleistocene Of Nebraska (With Notes On The Fossil Mammalian Remains), C. Bertrand Schultz, Gilbert C. Lueninghoener, W. D. Frankforter

Bulletin of the University of Nebraska State Museum (1924–2023)

I T SEEMS desirable at this time to present a graphic resume of the Nebraska Pleistocene, together with a summary of the stratigraphic sequences of the fossil vertebrates. This report is based on data taken from various publications' in addition to information gathered by the present writers during the past fifteen or more field seasons. Intensive work has been done in the past five years in connection with recovery of paleontological material in the areas where government dams are under construction (Schultz, Lueninghoener, and Frankforter, 1948; Schultz and Frankforter, 1948; Holder and Wike, 1949). The information in the present paper …

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Galls And Gall Insects Of Artemisia Tridentata Nutt, Solomon Lander Jun 1951

Galls And Gall Insects Of Artemisia Tridentata Nutt, Solomon Lander

Theses and Dissertations

Galls of Artemisia tridentata Nutt. of Utah County were collected and described in detail. Of the ten galls collected, seven were caused by members of the Itonididae, two by members of the Trypetidae, and one by a member of the Curculionidae. Of the seven Itonid galls, six were caused by species of Diarthronomyia, and one by a species of Rhopalomyia. Two of the galls were caused by new species of Diarthronomyia. Three genera of the Scelionidae (Hymenoptera) and four genera of the Chalcidoidea (Hymenoptera) were also reared from the galls. A key to the ten galls was constructed, but does …

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The Sweet Clover Weevil In South Dakota And Recommendations For Its Control, H.C. Severin May 1951

The Sweet Clover Weevil In South Dakota And Recommendations For Its Control, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The sweet clover weevil, bitona cylindricollis Fahr. is one of the principal insect pests attacking sweet clover in South Dakota. While the pest works on sweet clover principally, it has also been found feeding on other clovers and on alfalfa, although only in small numbers. The sweet clover weevil is a European insect which was first reported to have been taken on this continent near Montreal, Canada, in 1924. In 1941 it was found in South Dakota in small numbers but at the present time it occurs abundantly over the entire state.

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Recommendations For The Control Of The Most Important Insect Pests Of Potatoes In South Dakota, H.C. Severin May 1951

Recommendations For The Control Of The Most Important Insect Pests Of Potatoes In South Dakota, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The important insect pests attacking potatoes in South Dakota must be controlled if a good or even a fair yield of potatoes is to be harvested. Many different species of insects attack growing potato plants in the state, but the insects of major importance do not form a long list. It is not necessary for the grower to be able to recognize the minor potato insects, but it is a distinct advantage to be able to recognize the major species. Further, it would be profitable if the potato grower would familiarize himself with the life cycle and seasonal h}story of …

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How To Control Insects Harmful To Alfalfa Seed Production In South Dakota [Revised], H.C. Severin Apr 1951

How To Control Insects Harmful To Alfalfa Seed Production In South Dakota [Revised], H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

In order that a grower of alfalfa seed may have the best chance of producing a. good seed yield, the harmful insects in the alfalfa field must be destroyed, while the beneficial pollinating insects should not be reduced but encouraged. The most harmful insects that affect the seed yield of alfalfa in South Dakota are the following: Grasshoppers of several species Crickets of several species Lygus and other plant bugs Clover, potato and other leaf hoppers Flea beetles of several species

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A Tumorous Head Mutation In Drosophila Melanogaster, Roy P. Thelander Apr 1951

A Tumorous Head Mutation In Drosophila Melanogaster, Roy P. Thelander

Journal of the Minnesota Academy of Science

No abstract provided.

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Some New Facts In The Biology Of The Box Elder Bug, Milton Tinker Apr 1951

Some New Facts In The Biology Of The Box Elder Bug, Milton Tinker

Journal of the Minnesota Academy of Science

No abstract provided.

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The Biology Of The Goldenrod Gall-Fly, Eurosta Solidaginis (Fitch), Blanchard O. Krogstad Apr 1951

The Biology Of The Goldenrod Gall-Fly, Eurosta Solidaginis (Fitch), Blanchard O. Krogstad

Journal of the Minnesota Academy of Science

No abstract provided.

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Milliped Assembly Zinaria Butlerii Isogen (Xystodesmidae), Nell B. Causey Jan 1951

Milliped Assembly Zinaria Butlerii Isogen (Xystodesmidae), Nell B. Causey

Journal of the Arkansas Academy of Science

No abstract provided.

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On Eurymerodesmidae, A New Family Of Diplopoda (Strongylosomidea), And A New Arkansas Species Of Eurymerodesmus, Nell B. Causey Jan 1951

On Eurymerodesmidae, A New Family Of Diplopoda (Strongylosomidea), And A New Arkansas Species Of Eurymerodesmus, Nell B. Causey

Journal of the Arkansas Academy of Science

No abstract provided.

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A Larva Of Trichodes Ornatus From A Pollen Trap On A Hive Of Honey Bees, William P. Nye, George E. Bohart Jan 1951

A Larva Of Trichodes Ornatus From A Pollen Trap On A Hive Of Honey Bees, William P. Nye, George E. Bohart

All PIRU Publications

No abstract provided.

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Forest Fires In The Northern Rocky Mountains, J S. Barrows Jan 1951

Forest Fires In The Northern Rocky Mountains, J S. Barrows

The Bark Beetles, Fuels, and Fire Bibliography

This is a report on an analysis of 36,000 forest fires in the northern Rocky Mountains. The analysis was made to gain a better understanding of the occurrence, behavior, control, and effects of fires, and in turn to obtain essential information required for improved planning and management of fire protection systems. The results present answers to these questions: 1) What is the magnitude of the regional fire problem? 2) What are the basic features of fire behavior under various topographic, fuel, and weather conditions? 3) What have been the results of organized fire control programs including fire prevention, detection, communication, …

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Honey Bees For Higher Yields Of Alfalfa Seed In Utah, George E. Bohart, George F. Knowlton Jan 1951

Honey Bees For Higher Yields Of Alfalfa Seed In Utah, George E. Bohart, George F. Knowlton

All PIRU Publications

No abstract provided.

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Hive And Field Mortality Of Honey Bees In Northern Utah Due To Effects Of Certain Ecological And Chemical Factors, Shih Chun Ma May 1950

Hive And Field Mortality Of Honey Bees In Northern Utah Due To Effects Of Certain Ecological And Chemical Factors, Shih Chun Ma

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The honey bee is the most important pollinating insect in Utah, because various important crops such as fruits, legumes, and vegetable seed crops depend chiefly on it for pollination. In the past, honey bees have suffered repeated severe death losses through contact with arsenic and other agricultural chemicals. Recently the newer insecticides, such as DDT, chlordane, parathion, benzene hexachloride, lindane, toxaphene, and several kinds of miticides have further complicated the problem of bee survival. In addition, natural enemies such as predators and parasites and some unfavorable environmental conditions, including unfavorable temperature and humidity, wind, storm, and other changeable weather conditions, …

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Greenbug Control, Wm. M. Rogoff Apr 1950

Greenbug Control, Wm. M. Rogoff

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

Greenbug infestations in the State of South Dakota are unusual and have generally been broken by the interaction of natural factors such as predators, parasites, and weather. In the 1949 outbreak, the greenbug was seldom if ever the sole cause of damage in infested fields and in most cases spraying would not have been paid for by the remaining crop. The chemicals available for control are exceedingly dangerous to man and livestock, and their use should not be encouraged except where a clear and definite need has been shown to exist.

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How To Control Insects Harmful To Alfalfa Seed Production In South Dakota, H.C. Severin Apr 1950

How To Control Insects Harmful To Alfalfa Seed Production In South Dakota, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

In order that a grower of alfalfa seed may have the best chance of producing a. good seed yield, the harmful insects in the alfalfa field must be destroyed, while the beneficial pollinating insects should not be reduced but encouraged. The most harmful insects that affect the seed yield of alfalfa in South Dakota are the following: Grasshoppers of several species Crickets of several species Lygus and other plant bugs Clover, potato and other leaf hoppers Flea beetles of several species

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Control Of Grasshoppers Through Chemical Sprays Or Dusts Or Baits, H.C. Severin Apr 1950

Control Of Grasshoppers Through Chemical Sprays Or Dusts Or Baits, H.C. Severin

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

No abstract provided.

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The Use Of Aircraft In European Corn Borer Control, Gerald B. Spawn Apr 1950

The Use Of Aircraft In European Corn Borer Control, Gerald B. Spawn

Agricultural Experiment Station Entomology Pamphlets (1940-1952)

The European corn borer is at present considered to be the No. 1 insect pest of corn in South Dakota. It is now known (by specimen records) to be present in every county east of the Missouri river and in Lyman, Gregory and Tripp counties west of the Missouri River in South Dakota. During 1948 the corn borer did an estimated $2,500,000 worth of damage in our state~ In 1949 this damage figure was increased to $7,545,000.

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Observations On The Mating Habits Of Halictid Bees, George E. Bohart Jan 1950

Observations On The Mating Habits Of Halictid Bees, George E. Bohart

All PIRU Publications

No abstract provided.

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New Insecticides. What Is Their Effect On Bees When Applied To Flowering Alfalfa?, George F. Knowlton, William P. Nye, F. V. Lieberman, F. E. Todd, George E. Bohart Jan 1950

New Insecticides. What Is Their Effect On Bees When Applied To Flowering Alfalfa?, George F. Knowlton, William P. Nye, F. V. Lieberman, F. E. Todd, George E. Bohart

All PIRU Publications

No abstract provided.

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