Report of the United States Entomological Commission for the Years ...

Przednia okładka
U.S. Government Printing Office, 1883
Each vol. relates to different injurious insects (i.e., 2nd, Rocky Mountain locust, and the western cricket; 3rd, Rocky Mountain locust, the western cricket, the army worm, canker worms, and the Hessian fly).

Z wnętrza książki

Co mówią ludzie - Napisz recenzję

Nie znaleziono żadnych recenzji w standardowych lokalizacjach.

Inne wydania - Wyświetl wszystko

Kluczowe wyrazy i wyrażenia

Popularne fragmenty

Strona 106 - VI, fig. 3.] WHEN AND WHERE THE EGGS ARE LAID. — The favorite place to which the Army Worm moth consigns her eggs in wild or tame grass or in grain is along the inner base of the terminal blades where they are yet doubled, or between the stalk and its surrounding sheath. They are by no means strictly confined to these situations, as is shown by the fact that we have known the moths in breeding cages to oviposit in crevices on the side of sward which had been cut with a knife, or even between the...
Strona 244 - November, or from thirty to forty days after the wheat is sown, they assume the " flaxseed " state, and may, on removing the lower leaves, be found as little brown, oval, cylindrical, smooth bodies, a little smaller than grains of rice. They remain in the wheat until during warm weather ; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly emerging from the flaxseud case about the end of April.
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 66 - 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 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 95 - Rensselaer and eastern sections of Saratoga. Many meadows and pastures have been rendered by their depredations as barren as a heath. It appears to be the same species. of worm that has created so much alarm ill Worcester County, but we suspect it is.
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.
Strona 106 - ... roots. In our first observations, which were made in low blue grass, the eggs were almost invariably found in the fold at the base and junction of the terminal leaf with the stalk ; but later they were found thrust down between the sheath and the stalk, and occasionally in the natural curl of a green leaf or the unnatural curl at the sides of a withered leaf. The rankest tufts of grass, caused in pastures by the droppings of cattle...
Strona 216 - They also have elbowed antennae with from six to fourteen joints, and the wings are often deficient in veins. The abdomen is usually smaller, and composed ordinarily of seven rings in the male, and of six in the female, the latter often having a short but visible ovipositor, a horny tube consisting of three pairs of stout bristles closely united and forming a quite solid tube. Some species are wingless. There are 1,200 species of the family known in Europe, and there are, in afl probability, at least...
Strona 248 - No. 4. The Hessian Fly. Its Ravages, Habits, Enemies, and Means of preventing its Increase. By AS Packard, MD (1880.) [pp.

Informacje bibliograficzne