The Shipley Collection of Scientific Papers, Volume 2381920 |
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Page 3
LEAF DISEASE THAT IT TRANSMITS . By E. D. BALL INTRODUCTION The beet leafhopper ( Eutettix tenella Baker ) , is the most serious pest of the western sugar beet . It has through the dis- ease it transmits caused periodic losses to the ...
LEAF DISEASE THAT IT TRANSMITS . By E. D. BALL INTRODUCTION The beet leafhopper ( Eutettix tenella Baker ) , is the most serious pest of the western sugar beet . It has through the dis- ease it transmits caused periodic losses to the ...
Page 7
... leaf and an unhealthy condition called ' curly - leaf ' or ' blight . ' " Attention was called to the fact that hot ... leaves of pigweed to become " curly " and red and that the in- jury in both cases was entirely out of proportion to ...
... leaf and an unhealthy condition called ' curly - leaf ' or ' blight . ' " Attention was called to the fact that hot ... leaves of pigweed to become " curly " and red and that the in- jury in both cases was entirely out of proportion to ...
Page 8
... leaf . Cage experiments were carried on with E. strobi Fh . demonstrating the production of leaf curls and red discoloration . varying in seriousness of injury with the ... leaves , the first curly - leaf that had ever 8 BULLETIN NO . 155.
... leaf . Cage experiments were carried on with E. strobi Fh . demonstrating the production of leaf curls and red discoloration . varying in seriousness of injury with the ... leaves , the first curly - leaf that had ever 8 BULLETIN NO . 155.
Page 9
leaves , the first curly - leaf that had ever been produced in that laboratory . This paper contains many valuable records of early outbreaks and a long series of observations on the effect of dif ferent times of planting on the amount ...
leaves , the first curly - leaf that had ever been produced in that laboratory . This paper contains many valuable records of early outbreaks and a long series of observations on the effect of dif ferent times of planting on the amount ...
Page 11
... leaf beets . They were able to find this organism in the youngest and most minute vascular bundles of affected leaves . The same organism was found in lesions in a large number of curly - top conditions not caused by Eutettix tenella ...
... leaf beets . They were able to find this organism in the youngest and most minute vascular bundles of affected leaves . The same organism was found in lesions in a large number of curly - top conditions not caused by Eutettix tenella ...
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.