Third Report of the United States Entomological Commission Relating to the Rocky Mountain Locust, the Western Cricket, the Army Worm, Canker Worms and the Hessian Fly ...U.S. Government Printing Office, 1883 - 451 |
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Strona 15
... length and between 1 and 2 in width . The young at first appeared quite lively , but soon became rather torpid , the effect of much rain and snow . Large numbers of them died , and about the time the remaining few reached the pupa stage ...
... length and between 1 and 2 in width . The young at first appeared quite lively , but soon became rather torpid , the effect of much rain and snow . Large numbers of them died , and about the time the remaining few reached the pupa stage ...
Strona 17
... length of time . It is true reports have come from several locali- ties that crops were partially destroyed by " grasshoppers , " but might they not be other species ? If they were of the migratory kind , I should think that we should ...
... length of time . It is true reports have come from several locali- ties that crops were partially destroyed by " grasshoppers , " but might they not be other species ? If they were of the migratory kind , I should think that we should ...
Strona 32
... length in various newspaper articles and other sketches of which this insect with its his- tory formed the subject . The reports , too , of the United States Ento- mological Commission are exhaustive on this portion of its natural ...
... length in various newspaper articles and other sketches of which this insect with its his- tory formed the subject . The reports , too , of the United States Ento- mological Commission are exhaustive on this portion of its natural ...
Strona 34
... length and frequently six inches in depth . These were both old and young . They hatched on the foot- hills and ate the grasses clean . He said that " while the greater portion of this Permanent Region offers favorable situations for ...
... length and frequently six inches in depth . These were both old and young . They hatched on the foot- hills and ate the grasses clean . He said that " while the greater portion of this Permanent Region offers favorable situations for ...
Strona 47
... length of time without showing the least signs of disease and of dwindling . This interior basin and western mountain region being at a greater elevation than the region lying to the east , to which has been given the name of the Sub ...
... length of time without showing the least signs of disease and of dwindling . This interior basin and western mountain region being at a greater elevation than the region lying to the east , to which has been given the name of the Sub ...
Kluczowe wyrazy i wyrażenia
2d joint 3-jointed abdomen abdominal segment antennæ appearance Army Worm body brood Caloptenus Canker Worm Cecidomyia cells cercopoda clypeus Corydalus County coxa coxæ crop damage deposited destroyed developed Dicerca dorsal edge eggs embryo Entomological Entomologist epicranium epimerum epis episternum Farmer female field Fitch flies Forficula front Gissler grain grass ground habits hatched head Hessian Fly hibernation hind Illinois injury insect labrum larva larvæ lateral legs Leucania unipuncta lobe locusts long as broad mandibles maxilla median membrane meso mesonotum mesopleurum mesosternum mesothorax metanotum metathorax Missouri moths mouth-parts Myrmeleon narrow nearly Neuroptera notum numbers observed Orthoptera pair palpi parasites PLATE Pleurum pometaria portion posterior præscutum pronotum prothorax Pseudoneuroptera pupa Raphidia ravages region Report Riley Rocky Mountain locust sclerite scutellum scutum season seen short side sowing species spiracles spretus spring stalk sternum sun-spots suture swarms tergites thorax transverse trees trochantine uromeres vernata wheat wings winter
Popularne fragmenty
Strona 66 - The part of the sun's disc not occupied by spots is far from uniformly bright Its ground is finely mottled with an appearance of minute, dark dots, or pores, which, when attentively watched, are found to be in a constant state of change. There is nothing which represents so faithfully this appearance as the slow subsidence of some flocculent chemical precipitates in a transparent fluid, when viewed perpendicularly from above...
Strona 93 - ... but they soon filled the ditch, and the millions that were in the rear went over on the backs of their fellows in the trench, and took possession of the interdicted food. The inhabitants then adopted another expedient to save those fields yet standing. They cut a trench as before ; then took round and smooth...
Strona 92 - ... were caterpillar years." 1666. "The Indian corn eaten by the worms." 1743. "Millions of devouring worms in armies, threatening to cut off every green thing.
Strona 131 - ROLLING; FENCING; ROPING. — Where the crop of a field has been completely destroyed by the worms, the plan of killing them by heavy rollers has been tried. This, however, is an expensive remedy and is not as satisfactory as might be supposed. Experiments on Long Island in 1880 proved that even where the ground was level the rollers soon became irregularly covered with mud composed of earth and of the juices of the crushed worms, so that the effect was much the same as if the ground had been uneven,...
Strona 92 - Millions of devouring worms in armies, threatening to cut off every green thing." 1762. " At last, when the corn was planted, millions of worms appeared to eat it up." 1770. "A very uncommon sort of a worm, called the Canker Worm, ate the corn and grass all as they went above ground, which cut short the crops in many places.
Strona 245 - ... field of winter wheat may thus be recuperated in the spring. 6. Pasturing with sheep, and consequent close cropping of the winter wheat in November and early December, may cause many of the eggs, larvae, and flaxseeds to be destroyed ; also, rolling the ground may have nearly the same effect. 7. Sowing hardy varieties. The Underbill Mediterranean wheat, and especially the Lancaster variety, which tillers vigorously, should be sown in preference to the slighter, less vigorous kinds in a region...
Strona 213 - Here it fastens, lengthwise, and head downwards, to the tender stalk, and lives upon the sap. It does not gnaw the stalk, nor does it enter the central cavity thereof; but, as the larva increases in size, it gradually becomes embedded in the Bubstance of the stalk.
Strona 230 - As previously stated, most probably nine-tenths of the young Hessian Flies are destroyed in the larva or pupa state by the parasites already described. For the most part these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to burn the stubble in the autumn or early spring is simply to destroy these useful parasites, the best friends of the farmer. We do not hesitate to urge that the straw be untouched. On the contrary, the parasites should be gathered and bred...
Strona 200 - And in the upper counties of Georgia it is said "the fly has committed such ravages upon the wheat as scarcely to leave enough seed for another year.