The Shipley Collection of Scientific Papers, Volume 2381920 |
From inside the book
Results 1-5 of 100
Page 5
... injury to wheat . It was believed locally that the Hessian fly was responsible for the damage that was being done . A very superficial examination of the injured fields proved beyond a doubt that the Cephus was present in large numbers ...
... injury to wheat . It was believed locally that the Hessian fly was responsible for the damage that was being done . A very superficial examination of the injured fields proved beyond a doubt that the Cephus was present in large numbers ...
Page 7
... injury during the year 1919 was greater than during any previous year since the study of this pest was begun . More fields had been seriously invaded and were injured to a larger extent than had before been observed . Even fields of ...
... injury during the year 1919 was greater than during any previous year since the study of this pest was begun . More fields had been seriously invaded and were injured to a larger extent than had before been observed . Even fields of ...
Page 8
... injury caused by these formerly harmless insects bids fair to increase steadily . In the past the numbers of grass - feeding insects such as the one considered in this paper have been governed mainly by the supply of food plants . A dry ...
... injury caused by these formerly harmless insects bids fair to increase steadily . In the past the numbers of grass - feeding insects such as the one considered in this paper have been governed mainly by the supply of food plants . A dry ...
Page 25
... injury to the larvæ from the fire . These facts would indicate the futility of burning the stubble as a control measure . Although it might seem possible to decrease the numbers of the fly by mowing roadside and fence - row grasses ...
... injury to the larvæ from the fire . These facts would indicate the futility of burning the stubble as a control measure . Although it might seem possible to decrease the numbers of the fly by mowing roadside and fence - row grasses ...
Page 8
... injury were figured , in- cluding the thickened or " warty " veins so characteristic of curly - leaf . Cage experiments were carried on with E. strobi Fh . demonstrating the production of leaf curls and red discoloration . varying in ...
... injury were figured , in- cluding the thickened or " warty " veins so characteristic of curly - leaf . Cage experiments were carried on with E. strobi Fh . demonstrating the production of leaf curls and red discoloration . varying in ...
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.