Report of the Entomological Department of the New Jersey Agricultural College Experiment Station: 1893, Volume 1893John L. Murphy Publishing Company, 1894 |
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Report of the Entomological Department of the New Jersey Agricultural ... Visualização completa - 1906 |
Report of the Entomological Department of the New Jersey Agricultural ... Visualização completa - 1897 |
Report of the Entomological Department of the New Jersey Agricultural ... Visualização completa - 1911 |
Termos e frases comuns
abdomen abundant antennæ ants appearance army-worm attack beak bees beetles beneficial insects blister-beetles body brood bugs caterpillars cocoons color corn creatures crop cultivated Cumberland county cutworms damage decaying destroyed early eggs are laid elm-leaf beetle elytra enlarged entire Entomologist farmer feed feeders female field flattened flea-beetles flies flowers forms frequently fruit full grown genus grass grasshoppers ground habits hatch head horse-fly Hunterdon county imago inch in length increase infested injurious jars kainit lady-bird large number larva larvæ lay their eggs leaves legs live louse maggots male mandibles matter midge moth mouth nests number of species nuts Ocean county orchard ovipositor parasitic pears pests plant lice pollen Port Monmouth potato-beetle potatoes predaceous pupa reports resemble Riley season side slender sometimes specimens Standard Nat thorax trees troublesome usually vegetable wasps webworms wheat wing covers wing-covers wireworms worms young larvæ
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Página 543 - This is effected by extending the prothorax so as to bring the prostcrnal spine to the anterior part of the mesosternal cavity, then suddenly relaxing the muscles so that the spine descends violently into the cavity; the force given by this sudden movement causes the base of the elytra to strike the supporting surface, and by their elasticity the whole body is...
Página 548 - The larva when hatched, first devours the grub of the bee in the cell in which it is born and then proceeds from cell to cell, preying upon the inhabitant of each until arrived at maturity. It is in this situation, also, that it undergoes its changes in a small cocoon, which it has previously constructed, making its escape from the nest in the beetle state, where the hardness of its covering sufficiently defends it from the stings of the bees.
Página 441 - No farther experiments seem to have since been carried on with this substance against the Cabbage Root Maggot. Last year Prof. Smith had some of his correspondents experiment with kainit on the Onion Maggot (An. Rept. for 1893. p. 441). He says: "The entire fields were gone over, row by row, and all plants that showed signs of infection were taken out bodily and afterwards destroyed. Then heavy dressings of kainit were applied, with the result that no further traces of these maggots were seen at...
Página 552 - Rove beetles, which are long, linear, black, with remarkably short elytra, the abdomen beyond having 7 to 8 visible rings. Though- sometimes an inch in length, they are more commonly minute, inhabiting wet places under stones, manure heaps, fungi, moss, under the surface of bark, or leaves of trees.
Página 463 - They are elongate pyriform in shape, smooth and shining, and of a light orange yellow color when first laid, becoming darker before hatching. A short stalk on the larger end attaches the egg to the bark, and a long thread-like process projects from the smaller end. The temperature conditions in the spring influence not only the time of o%nposition of the winter brood, but also the duration of the egg stage.
Página 581 - Pimpla conquiritor: a, larva; b. head of do. from front; e, pnpa; d, adult female (bair line indicating natural size); e, end of male abdomen from above . /, same from the side — all enlarged. (After Riley.) fonnd very abundantly in the Bags, bnt may be a secondary parasite.
Página 478 - ... oviposition varies for different latitudes. Generous fertilization will aid the plants in overcoming injury very considerably. Dr. JB Smith advises " the application of all the necessary potash in the form of kainit, put on as a top-dressing after the field is prepared for planting...
Página 579 - Cynipidas, are parasitic upon or within the bodies of other insects, using the words of Westwood, " are of vast importance in the economy of nature by preventing the too great increase of different species of insects, especially of the caterpillars and moths, of which they destroy a great number.
Página 553 - ... quite active. The jaws are small and inconspicuous. They are often quite gaily colored, and covered with scattered tubercles, spines, or tufts of hair. They attain their full growth in three to four weeks. When about to transform to pupae they attach themselves by the end of the body to a leaf or twig, and either throw off the old larva skin, which remains around the tail, or retain it around the pupa for protection.
Página 463 - ... formed just beneath the old one. At the last moulting of the skin, which occurs about one month after the nymph's emergence from the egg, the adult insect appears. Habits of the adult. — The adult insect has quite different habits from what it had when a nymph. The strong legs and wings of the adult enable it to spring up and fly away with surprising quickness upon the slightest unnatural jar or the near approach of the hand to its resting place. The hibernating forms, however, are quite sluggish...