The Shipley Collection of Scientific Papers, Volume 2381920 |
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Page 6
... later in this same field , so the average may be larger than sta- ted . During April , 1917 , Mr. Yeam's field was again visited and a ran- dom square yard marked out and counted . Two hundred and sixty - nine infested stubs were taken ...
... later in this same field , so the average may be larger than sta- ted . During April , 1917 , Mr. Yeam's field was again visited and a ran- dom square yard marked out and counted . Two hundred and sixty - nine infested stubs were taken ...
Page 7
... later in this paper . It may be stated , however , that the farmers are profiting by past experience and have used horserakes in stubble fields to such an extent that the percentage of actual loss of grain has been reduced to a small ...
... later in this paper . It may be stated , however , that the farmers are profiting by past experience and have used horserakes in stubble fields to such an extent that the percentage of actual loss of grain has been reduced to a small ...
Page 14
... later it was noticed that the silk tube had collapsed and the larva within was limp and apparently dying . The surplus moisture was removed quickly , whereupon the larva revived almost at once . If the same amount of moisture had ...
... later it was noticed that the silk tube had collapsed and the larva within was limp and apparently dying . The surplus moisture was removed quickly , whereupon the larva revived almost at once . If the same amount of moisture had ...
Page 15
... later a pupation cell . Within this chamber the larva lies with its head up and usually pressed against the barrier at the top , always on the alert to retreat down- ward at any sign of disturbance . It descends by alternately flexing ...
... later a pupation cell . Within this chamber the larva lies with its head up and usually pressed against the barrier at the top , always on the alert to retreat down- ward at any sign of disturbance . It descends by alternately flexing ...
Page 16
... later , 17 months from the time they were gathered , they were still alive . and feebly active . Infested stubs of the same grass taken during September , 1912 , and treated in the same manner , contained at least one living larva on ...
... later , 17 months from the time they were gathered , they were still alive . and feebly active . Infested stubs of the same grass taken during September , 1912 , and treated in the same manner , contained at least one living larva on ...
Common terms and phrases
abdominal segment abundant adults alfalfa weevil Allorhina nitida antennae appear apple Arzama Arzama obliqua attack August average bean beet borers burrow cage Calendra cat-tail cent Cephus Cephus cinctus climatic color Cotinis crop curly-leaf dark brown decora deposited disease dorsal early eggs elytra emerged entered soil Entomology experiments feeding female field fig moth figs flowers foliage food plants Galerucella grass ground grubs habits hatched head hibernation hopperburn inches infested injury insect instar Japanese beetle July July 25 killed large number larvæ leaf leafhopper leaves legs length Mesothoracic metathorax molted nymphs oblonga observed occur orchard oviposition parasites period pest Plate potato prepupae prothorax pupa pupal pupation rainfall region rhizome season seeds serghi setae showing Smyrna species specimens spiracles spray spring stage stem sterilized surface temperature third instar thorax trees tubercles Typha latifolia Utah ventral width wings winter writer yellow
Popular passages
Page 4 - If it consists in whole or in part of a filthy, decomposed, or putrid animal or vegetable substance, or any portion of an animal unfit for food, whether manufactured or not, or if it is the product of a diseased animal, or one that has died otherwise than by slaughter. Sec. 8. That the term
Page 9 - ... determine whether or not it is safe and profitable to add 20 per cent more of the lime-sulphur concentrate to a given amount of water, thus increasing the strength of the summer spray to that extent. In 1913 a proprietary spraying material in powder form, known under the trade name of "Soluble Sulphur," was used at the rate of 2 pounds to 50 gallons of water in combination with one pound of dry arsenate of lead. While this material appeared to be quite effective in scab control that season very...
Page 61 - In order that the ecological relationships of the insect fauna of the cat-tail plant may be better understood, the first part of this paper deals with the ecology of the cat-tail plant. In the second part, the life history and biology of the insect inhabitants of the plant are discussed. This part of the paper has been treated from a systematic point of view, considering the insects under their respective orders, rather than grouping them according to their life habits. In the resume", composing...
Page 16 - FH CHITTENDEN, in charge of truck crop and stored product insect investigations. AD HOPKINS, in charge of forest insect investigations. WD HUNTER, in charge of southern field crop insect investigations. FM WEBSTER, in charge of cereal and forage insect investigations. AL QUAINTANCE, in charge of deciduous fruit insect investigations. EF PHILLIPS, in charge nf bee culture.
Page 23 - Sc. D., In Charge of Truck Crop and Stored Product Insect Investigations.