Comments on Organization in Agricultural College Extension Work in Economic EntomologyCooley, R. A.
doi: 10.1093/jee/8.5.442pmid: N/A
Abstract Certain factors, recently new, tend greatly to stimulate interest in extension work in economic entomology. The same factors have given a new impetus as well to the extension efforts in other departments of agricultural knowledge but to those branches of the agricultural college often spoken of as the science departments, and including entomology, which are concerned in the more specialized branches of agricultural knowledge and require particularly the service of specialists, the new movement comes bringing particular interest, new responsibilities and, above all, a great opportunity. In the opinion of the writer, official economic entomologists, in particular, are called upon to make a special effort in order that a right beginning may be made and that the fullest measure of good may result eventually from the present rapidly changing conditions. I refer in particular to the Smith-Lever Act which became a law on May 8, 1914, and to certain items in the appropriations to the United States Department of Agriculture which authorizes extension work, but which are being expended largely in cooperation with, and under the direction of, the agricultural colleges in the several states. This content is only available as a PDF. © 1915 Entomological Society of America
Some Results of the Introduction of Beneficial Insects in the Hawaiian IslandsSwezey, Otto H.
doi: 10.1093/jee/8.5.450apmid: N/A
Abstract Only a very few of the native insects of the Hawaiian Islands have become injurious to cultivated crops or plants. The insect pests occurring there are in most cases foreign insects that have arrived through the channels of commerce. The promiscuous importation of fruits, seeds, trees, plants, etc., from all parts of the world has been the chief way by which the numerous insect pests have gained access to these islands. One has but to observe the profusion and variety of trees, shrubs, and plants in the public parks and private grounds of Honolulu to realize to what extent this has been carried on, for in all of this there is only an occasional native tree or plant to be seen. This content is only available as a PDF. © 1915 Entomological Society of America
Spraying Notes on the Control of the Fruit Tree Leaf-Roller in the Hood River ValleyChilds, Leroy
doi: 10.1093/jee/8.5.457pmid: N/A
Abstract In the face of the already valuable information that is available on the life-history and the control of the leaf-roller, this paper and the work that it represents might appear to some as superfluous. In citing the literature, however, I find little or no published experimental work dealing with the control of this serious and numerically increasing apple pest on the Pacific Coast. A still more important point which made experimentation, at least with the oils, imperative was to determine if possible what influence spring applications of oils have on the adhesive properties of fall applications of Bordeaux mixture. In the Northwest we have a very serious apple disease known as apple tree anthracnose, for control of which Bordeaux is applied before the early rains in the fall. It has been suggested, and seems, indeed, quite possible, that there may exist some such condition, information relative to which is desired before the general use of oil can be recommended. The anthracnose spray has not been applied with the result that a report on this point is impossible at this time. The leaf-roller, however, has passed through its period of activity for this season and the data gathered relative to its control is complete. This content is only available as a PDF. © 1915 Entomological Society of America
A Preliminary Statement Regarding Wool Maggots of Sheep in the United StatesBishopp, F. C.; Laake, E. W.
doi: 10.1093/jee/8.5.466pmid: N/A
Abstract The wool maggots, although pests of importance to sheep raisers, have received practically no attention from investigators in the United States. In Europe, especially in the British Isles, the wool maggot is one of the most serious insect pests of sheep. In Scotland, in particular, every shepherd is familiar with this type of injury, and the watching of the flocks for infested animals and the destruction of the maggots are a part of their routine work. The common green-bottle fly, Lucilia sericata, is responsible for the trouble in Great Britain, and also in parts of continental Europe. Only those animals which have the wool considerably soiled with blood, fæces or urine are attacked. This species of fly is abundant in the United States, and, in fact, is almost world-wide in distribution. This content is only available as a PDF. Author notes 1 Published by permission of the Chief of the Bureau of Entomology © 1915 Entomological Society of America
Varying Susceptibility of the San Jose Scale to SpraysMelander, A. L.
doi: 10.1093/jee/8.5.475bpmid: N/A
Abstract There seems to be no doubt but that sulphur-lime has ordinarily been a most efficient scalecide. In the arid region at Wawawai, Washington, Piper twelve years ago was able to announce complete destruction of the San José scale in one to two weeks after the application. Similar quick results have been observed in recent years with scales from Wenatchee. On the other hand, this insect is becoming increasingly prevalent in some of the older fruit sections of Washington, notably at Clarkston, and a critical investigation shows that not only are the scales slow to succumb to the effects of sulphur-lime but that there is a pronounced and great individual difference, many scales manifesting even a complete immunity to this insecticide. This content is only available as a PDF. Author notes 1 Contribution from the Zoölogical Laboratory of the State College of Washington © 1915 Entomological Society of America
The Toxic values of the Arsenates of LeadTartar, H. V.; Wilson, H. F.
doi: 10.1093/jee/8.5.481pmid: N/A
Abstract For several years investigations have been carried on at the Oregon Agricultural Experiment Station to determine the relative insecticidal values of the different insecticides in common use. The problems taken up have involved both chemical and entomological work and the data obtained show some very interesting results. Among other things the work done has shown that there are two different arsenates of lead present in the commercial material and that they are quite variable in their action and efficiency. We designate these compounds as lead hydrogen arsenate (acid) and basic lead arsenate (neutral) and experiments made, using both substances in a pure state, show that the first is quicker acting than the second and apparently more efficient in strengths containing equal amounts of arsenic. The data presented in this paper deal with experiments conducted to determine the comparative toxic value of these compounds. This content is only available as a PDF. © 1915 Entomological Society of America