Transcript Russian Wheat Aphid

Diuraphis noxia
Name
 Kingdom: Animalia
 Phylum: Arthropoda
 Class: Insecta
 Binomial Nomenclature: Diuraphis noxia
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From Eurasia (central and western)
Came to U.S. in 1986
Brought to Texas accidentally from Mexico
Can now be found in many western states
(California, Colorado, Nevada, etc.)
Map Of Distribution
over all years
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Mostly eats Wheat and Barley
Main economic effect: Farmers lose money
by losing crops and by buying pesticides
What Effects Has it
Caused?
(Ecosystems)
• To save money by not buying
pesticides, types of flies have been
introduced to stop the aphids
Food Web
Wheat
Sun
Barley
Aphid
Flies
Ladybug
Reasons For Success
• Many predators such as lady beetles
are too large to enter the rolled leaves
•Reproduce
Asexually and all
are female
In The Future
Attempts to Stop the Menace
• Farmers can plant their crops early
– Trade off- unanticipated weather
• Making sure plants are not under water
stress
– Trade off- might over water plants
• Not planting wheat or barley
– Trade off- fewer wheat and barley for
us(consumers)
Infected Crops
• The Aphid injects a toxin into the plant
while feeding and causes damage
• The leaves then get white
longitudinal streaks
• The leaf then curls up
Different Types
 Winged (alate)- when the plant dies
several nymphs grow wings
 They seek a new host plant
 Dark green thorax
 Wingless (apterous)- produce many
children
 Normal green thorax
• http://www.invasivespeciesinfo.gov/animals/r
wa.shtml
• http://www.ipm.ucdavis.edu/PMG/r73030021
1.html
• http://www.ksre.ksu.edu/library/entml2/mf26
66.pdf
• http://ces.uwyo.edu/PUBS/B1013.07.pdf