The Shipley Collection of Scientific Papers, Volume 2381920 |
From inside the book
Results 1-5 of 63
Page 11
... instar , with a series of stout bristles at the base of its cylindrical and squarely truncate extremity . The larva is footless , the position of the legs being marked by minute , rounded tubercles terminating in a few short bristles ...
... instar , with a series of stout bristles at the base of its cylindrical and squarely truncate extremity . The larva is footless , the position of the legs being marked by minute , rounded tubercles terminating in a few short bristles ...
Page 12
... instars is difficult to determine , owing to the larval practice , just referred to , of passing all the frass several times through the digestive apparatus . Nearly all the cast skins disappear com- pletely under this treatment , only ...
... instars is difficult to determine , owing to the larval practice , just referred to , of passing all the frass several times through the digestive apparatus . Nearly all the cast skins disappear com- pletely under this treatment , only ...
Page 13
... instars in the larval life of this species . The length of the larval period is probably about 60 days , varying more or less with the warmth of the summer and the state of maturity of the host stems . The acceleration or retardation of ...
... instars in the larval life of this species . The length of the larval period is probably about 60 days , varying more or less with the warmth of the summer and the state of maturity of the host stems . The acceleration or retardation of ...
Page 11
... instars . DEVELOPMENT AND FEEDING HABITS OF THE LARVA . The behavior of the larva varies as affected by individual char- acteristics , difference in size , vigor , and species of host trees , and dif- ference in localities , so that no ...
... instars . DEVELOPMENT AND FEEDING HABITS OF THE LARVA . The behavior of the larva varies as affected by individual char- acteristics , difference in size , vigor , and species of host trees , and dif- ference in localities , so that no ...
Page 9
... Instar . First larval stage period .. Second larval stage period . Third larval stage period .. Number of days . Instar . Number of days . 8 3 Fourth larval stage period .. P'upal period ... 6 7 Total . 33 The beetles which developed ...
... Instar . First larval stage period .. Second larval stage period . Third larval stage period .. Number of days . Instar . Number of days . 8 3 Fourth larval stage period .. P'upal period ... 6 7 Total . 33 The beetles which developed ...
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.