The Shipley Collection of Scientific Papers, Volume 2381920 |
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Results 1-5 of 100
Page 9
... ( 1915 ) tested leafhoppers taken from wild plants on beet seedlings and could produce no curly - leaf . A part of these leafhoppers were placed on curly - leaf beets and 1 3 PLATE I Fig . 1. A mangel seriously THE BEET LEAFHOPPER 9.
... ( 1915 ) tested leafhoppers taken from wild plants on beet seedlings and could produce no curly - leaf . A part of these leafhoppers were placed on curly - leaf beets and 1 3 PLATE I Fig . 1. A mangel seriously THE BEET LEAFHOPPER 9.
Page 10
1 3 PLATE I Fig . 1. A mangel seriously injured by curly - leaf . showing warty veins and papillae . Fig . 3 . show warty veins and veinlets ( light spots leafhoppers ) . after from three to seven days they were placed on. Fig . 2. A ...
1 3 PLATE I Fig . 1. A mangel seriously injured by curly - leaf . showing warty veins and papillae . Fig . 3 . show warty veins and veinlets ( light spots leafhoppers ) . after from three to seven days they were placed on. Fig . 2. A ...
Page 13
... PLATE II Fig . 1. A typical healthy beet . Fig . 2. A beet that was slightly af- fected late in the season , showing disease only on inner leaves . Fig . 3. A beet seriously affected late in the season , showing typical curly leaves ...
... PLATE II Fig . 1. A typical healthy beet . Fig . 2. A beet that was slightly af- fected late in the season , showing disease only on inner leaves . Fig . 3. A beet seriously affected late in the season , showing typical curly leaves ...
Page 21
... PLATE III Fig . 1. Adult beet leafnopper , la , male genitalia , 1b , female genitalia . Fig . 2. Typical larvae . Figs . 3 , 4 and 5. Variation in color and pattern of larvae . Fig . 6. Stem of beet leaf with epidermis partly rolled ...
... PLATE III Fig . 1. Adult beet leafnopper , la , male genitalia , 1b , female genitalia . Fig . 2. Typical larvae . Figs . 3 , 4 and 5. Variation in color and pattern of larvae . Fig . 6. Stem of beet leaf with epidermis partly rolled ...
Page 25
... plate and roughly represent the Pascoe - Yakima area in Wash- ington , the Escalante Desert in Utah , and the Lake Tulare re- gion in California . There must , of course , be others and no doubt are many worse centers than these , but ...
... plate and roughly represent the Pascoe - Yakima area in Wash- ington , the Escalante Desert in Utah , and the Lake Tulare re- gion in California . There must , of course , be others and no doubt are many worse centers than these , but ...
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.