Expression of garlic leaf lectin under the control of the phloem-specific promoterAsus1 fromArabidopsis thaliana protects tobacco plants against the tobacco aphid (Myzus nicotianae)

2007 ◽  
Vol 63 (12) ◽  
pp. 1215-1223 ◽  
Author(s):  
Amin Sadeghi ◽  
Sylvia Broeders ◽  
Henri De Greve ◽  
Jean-Pierre Hernalsteens ◽  
Willy J Peumans ◽  
...  
Keyword(s):  
Tobacco Plants ◽  
Myzus Nicotianae ◽  
Tobacco Aphid

SEASONAL ABUNDANCE OF RED AND GREEN MORPHS OF THE TOBACCO APHID (HOMOPTERA: APHIDIDAE) ON FLUE-CURED TOBACCO IN GEORGIA

1989 ◽  
Vol 24 (4) ◽  
pp. 531-538 ◽  
Author(s):  
Robert M. McPherson
Keyword(s):  
High Temperatures ◽  
Field Experiments ◽  
Aphid Population ◽  
Seasonal Abundance ◽  
Population Increase ◽  
Population Densities ◽  
Early Season ◽  
Myzus Nicotianae ◽  
Aphid Populations ◽  
Tobacco Aphid

The seasonal abundance of red and green morphs of the tobacco aphid, Myzus nicotianae Blackman, was investigated on flue-cured tobacco in Georgia during 1987–1988. The effect of tobacco transplantation date also was examined in 1988. Aphid populations peaked on tobacco in mid-June 1987, then rapidly declined following the removal of the terminal floral branch (topping). Early season samples contained both green and red morphs; however, by early June, and throughout the remainder of the season, the aphid population was almost exclusively comprised of the red morph. Similar results were obtained in 1988, although population densities were higher and peaked earlier in the early transplanting (30 March) compared to the 14 April and 28 April transplantings. Regardless of transplanting date, the red morphs began a rapid population increase about 45 days after transplantation, and this increase continued until plants were topped. Daily high temperatures exceeding 35°C did not appear detrimental to the red morphs in these field experiments.

Performance of the Tobacco Aphid (Homoptera: Aphididae) on Various Host Plants

1998 ◽  
Vol 33 (2) ◽  
pp. 180-195 ◽  
Author(s):  
Paul J. Semtner ◽  
William M. Tilson ◽  
Surendra K. Dara
Keyword(s):  
Host Plants ◽  
Green Peach Aphid ◽  
The United States ◽  
Weed Species ◽  
Nicotiana Tabacum L ◽  
Myzus Nicotianae ◽  
Solanum Americanum ◽  
Major Pest ◽  
Plant Families ◽  
Tobacco Aphid

The tobacco aphid, Myzus nicotianae Blackman, is a major pest of tobacco in the United States. It was separated from the green peach aphid, M. persicae (Sulzer), and described as a new species in 1987. Information on its host range is limited because the two species are so similar. Therefore, the performance of the tobacco aphid was studied on 28 potential host plants in six families. Numbers of offspring, age at first reproduction, longevity, weight, and percentage reproducing were compared. Tests were conducted on excised leaves or leaf disks maintained in Petri dishes in an environmentally-controlled chamber. Myzus nicotianae reproduced on hosts in the families Asteraceae, Convolvulaceae, Cruciferae, Malvaceae, and Solanaceae, but not on Spinacia in Chenopodiaceae. Myzus nicotianae generally reproduced most quickly, was heaviest, and produced the most nymphs on tobacco, Nicotiana tabacum L., and American black nightshade, Solanum americanum (Solanaceae). Performance also was good on Capsicum and S. dulcamara L. (Solanaceae). Aphids exhibited fair-to-good performance on three species of Ipomoea (Convolvulaceae), Datura, and Physalis (Solanaceae); Raphanus and two species of Brassica (Cruciferae); and Abelmmoschus (Malvaceae). Performance was fair on two species of Ipomoea, three species of Solanum, Lactuca (Asteraceae), and several Brassica. Longevity was short, and very few offspring were produced on Gossypium (Malvaceae) and Lycopersicon (Solanaceae). This study indicates that M. nicotianae does well on several species in five plant families that contain important crop and weed species.

Diagnostic esterases and insecticide resistance in the tobacco aphid, Myzus nicotianae Blackman (Homoptera: Aphididae)

1992 ◽  
Vol 43 (2) ◽  
pp. 123-133 ◽  
Author(s):  
Yehia A.I. Abdel-Aal ◽  
Emmett P. Lampert ◽  
Richard M. Roe ◽  
Paul J. Semtner
Keyword(s):  
Insecticide Resistance ◽  
Myzus Nicotianae ◽  
Tobacco Aphid

Influence of Temperature on Population Development of Two Color Morphs of the Tobacco Aphid (Homoptera: Aphididae) on Flue-Cured Tobacco

1991 ◽  
Vol 26 (1) ◽  
pp. 33-38 ◽  
Author(s):  
T. David Reed ◽  
Paul J. Semtner
Keyword(s):  
Growth Parameters ◽  
Reproductive Age ◽  
Population Development ◽  
Influence Of Temperature ◽  
Temperature Regimes ◽  
Color Morphs ◽  
Myzus Nicotianae ◽  
Influence Of Temperature On ◽  
Population Growth Parameters ◽  
Tobacco Aphid

Tests were conducted at seven constant temperature regimes in controlled environmental chambers to compare population growth parameters of red and green morphs of the tobacco aphid, Myzus nicotianae Blackman. The optimal temperature for population development of both color morphs was 25°C. At 25°C and above, the red morph had three advantages over the green; most striking was the ability to survive to reproductive age. The red morph also developed faster and was more fecund than the green. Although neither morph reproduced at 32°C, longevity of the red morph was 120% greater. Results of this study may help to explain the disproportionate development of populations of the red morph in the field.

The peach-potato aphid Myzus persicae and the tobacco aphid Myzus nicotianae have the same esterase-based mechanisms of insecticide resistance

1994 ◽  
Vol 3 (3) ◽  
pp. 143-148 ◽  
Author(s):  
L. M. Field ◽  
N. Javed ◽  
M. F. Stribley ◽  
A. L. Devonshire
Keyword(s):  
Insecticide Resistance ◽  
Myzus Persicae ◽  
Potato Aphid ◽  
Myzus Nicotianae ◽  
Peach Potato Aphid ◽  
Tobacco Aphid

Toxicity of Synthetic Sucrose Esters Against the Tobacco Aphid (Homoptera: Aphididae)

1998 ◽  
Vol 33 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Yulu Xia ◽  
Albert W. Johnson ◽  
O. T. Chortyk
Keyword(s):  
Insecticidal Activity ◽  
Field Tests ◽  
Sucrose Esters ◽  
Aphid Control ◽  
Laboratory Results ◽  
Myzus Nicotianae ◽  
Dry Conditions ◽  
G 31 ◽  
Tobacco Aphid ◽  
High Clearance

Four synthetic sucrose esters were evaluated in the laboratory and field to determine their insecticidal activity on the tobacco aphid, Myzus nicotianae Blackman. Synthetic sucrose esters provided moderate to good insecticidal activity against tobacco aphids in laboratory evaluations. Octanoyl sucrose esters were most toxic, and decanoyl sucrose esters were least toxic to aphids. Only the octanoyl sucrose esters at a 2 mg/ml rate were as toxic to aphids as the natural sugar esters from Nicotiana gossei Domin. They were also the most effective synthetic sucrose esters against aphids when a CO2 hand-held sprayer was used. All of the synthetic sucrose esters demonstrated significantly higher aphid mortality at a rate of 2 mg/ml than at 1 mg/ml. Heptanoyl and octanoyl sucrose esters provided significantly higher aphid control under wet conditions than under dry conditions in the laboratory. Results from field tests were inconsistent. Field evaluations conducted in 1995 showed that the four synthetic sucrose esters were moderately toxic at a rate of 4 mg/ml using a CO2 hand-held sprayer and low to moderately toxic using a high clearance sprayer. The addition of a surfactant (Volpo G-31, Silwet L-77 or Volpo G-31 plus Silwet L-77) significantly improved the efficacy of octanoyl sucrose esters when a CO2 hand-held sprayer was used. Relatively low aphid control was obtained with octanoyl sucrose esters in the field even though two surfactants were added when a high clearance sprayer was used at rates of 840 L/ha and 1400 L/ha.

The effects of auxin and antiauxin in an in vitro bioassay of flower regulatory activity in leaf exudate from tobacco plants

1991 ◽  
Vol 81 (1) ◽  
pp. 1-6
Author(s):  
M. Hatori ◽  
Y. Sakagami ◽  
S. Marumo
Keyword(s):  
Regulatory Activity ◽  
In Vitro Bioassay ◽  
Tobacco Plants ◽  
Leaf Exudate

Rod-shaped particles found in tobacco plants infected with tobacco stunt agent.

1981 ◽  
Vol 47 (2) ◽  
pp. 264-268 ◽  
Author(s):  
Shigeru KUWATA ◽  
Susumu KUBO
Keyword(s):  
Tobacco Plants
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